ML023220312

Attachment 3, Model 956-201 Failure History Summary

ML023220312
Person / Time
Site:	Ginna
Issue date:	11/04/2002
From:	Lasko A Syncor Radiation Management
To:	Swill P Office of Nuclear Reactor Regulation, Rochester Gas & Electric Corp
References
94095603WP, 956A-201
Download: ML023220312 (233)

Text

Attachment 3 Model 956A-201 Failure History Summary

• !,e!RADIATION SYNCOR

'. MANAGEMENT November 4, 2002 Rochester Gas and Electric Corporation Ginna Station 1503 Lake Rd.

Ontario, N.Y. 14519 Attention: Mr. Paul Swift, Project Engineer 6045 Cochran Road Cleveland

Reference:

Rochester Gas and Electric Corp. P.O. No.: 4500008671 Ohio 44139 USA Ginna Station, phone 440 248.9300 Syncor Radiation Management Sales Order No. 157033 fo*. 440 349.Z307 srI.syricor.com

Subject:

Model 956A-201 Failure History Summary

Dear Paul:

As requested during our recent NRC visit, the following is a summary of the Model 958A-201 failure history:

Model 956A-201 Failure History:

The overall reliability of the UIDR family is supported by our repair history data base, which has been in operation since 1988. On a total return basis, which includes returns for periodic re-calibrations for our 946 and 956 area monitor units, the UDR product line has exhibited an overall return rate of approximately 6% on a sales base of approximately 2,000 units. The vast majority of the units returned for repair are due to a failed dc power supply.

The total 956A installed base also exhibits a total return rate of approximately 6%. When the returns are adjusted for re-calibrations, a much lower return percentage would be realized. The 956A-201 model supplied to RG&E, which was first sold in 1995, currently exhibits a gross return rate of approximately 3%. This reduced return rate may be attributed to the power supplies not yet reaching maturity. The 956A returns are distributed as follows:

The Model 956 Digital Ratemeter UDR)T-s-one of three microprocessor based digital ratemeters designed by Victoreen (now Syncor) in 1985 for the nuclear industry. The Model 956 is used with a Geiger-Mueller tube detector for Area Monitoring. The Model 942 is used with scintillation detectors for process monitoring, and the Model 946 is used with an eight decade ion chamber detector, also for Area Monitoring. Each of these UDR's share a common mother board that contains the microprocessor (and 8-bit Motorola 6802 and associated electronics) and differ in the specific functions configured into the operating firmware. The active electronic components are high reliability, 54LS logic Miu-Spec components. Over the installed life of the unit, the 54LS logic has proved to be a reliable device, with a low failure rate.

SYNCOR 956A-200 Total Returnis:

Re-calibrations: 15 RADIATION 1 Corrosion damage MANAGEMENT Repair:

1 Broken AC power switch 2 Sales Demo Other 956A-201 Total Returns:

Re-calibrations: I Repair: 1 Random failure, D/A converter replaced 6045 Cochran Road Other: 1 Shipping damage Cleveland 1 Customer loan Ohio 44139 USA of the highest phone 440.248.9300 SyncorNictoreen has always been dedicated to the supply customers, and to

.fax 440.3,19.2307 quality products to our Nuclear Power and Medical May, 1998, we expanded srin syncor.com continually improving the quality of our products. In and implemented a formal, database our existing 10CFR21 reporting system Complaint our QSP-14-01, based, customer complaint tracking system, requires This procedure tracks customer complaints, and Handling. required to customers are not management review and monitoring. Although personnel and customer service input into the system, our internal engineering complaints into the are charged with the responsibility of entering customer logged to the entire system. To date, there have been a total of 3 complaints Model 9XX UDR family.

2002, involved units The first-two complaints, issued in Feb, 2000 and April, these complaints have that were modified for a specific customer. Both of issued in 2002, and been satisfactorily closed. The third complaint was also of the complaint, and action taken involved testing documentation. A summary follows:

for use with a roll up Feb, 2000: On a 946B Ion Chamber readout modified is not the configuration or ribbon cable rear panel connector interface, which by the customer to interface supplied for RG&E, the display value was found was not reproducible, sporadically change. When tested by Syncor, anomaly After considerable in and is not critical for the alarming function of the unit.

to the client. The house testing, a revised PROM was supplied from Syncor the complaint was customer was satisfied with the PROM provided, and be opened if the closed, with the understanding that a new complaint would anomaly re-occurred.

in a simulator, with an Apr, 2002: On a 946A Ion Chamber readout used from the detector, the analog input used to simulate the radiation input signal higher than the High customer advised it was possible to set the Warn alarm unit, where the firmware alarm. This was contrary to the operation of the actual higher than the High alarm set point.

does not accept a Warn alarm set point were then notified of the problem, All other customers using the same PROM of the unit charge. Since the ability and were offered an upgrade at a nominal None of the no safety concern.

to alarm was not compromised, there was the problem was closed.

user's elected to pursue the firmware change, and

K..

'*_ ° -

SYNCOR Oct, 2002: It was identified that EMI testing performed did not encompass the RADIATION specific levels of ERRI TR-102323-RI. The customer was advised, and a MANAGEMENT program to re-test the equipment to the specific limits of the EPRI specification was initiated.

Concerning IOCFR21 Notices, there has been only one 10CFR21 Notification issued. It was issued, 1999, and dealt with a BNC connector provided by as an equivalent to an another connector, and was found, by Syncor, to not have the same cable retention properties as the original. All of the incorrect connectors 6045 Cochran Road were subsequently replaced.

Cleveland Ohio 44139 USA We believe the clean operating history of the unit, the environmental and seismic qualification tests performed, and the V&V program performed for phonr 440.248 9300 RG&E, will ensure reliable operation of the Model 956A-201 UDR for their fcu 440.349 2307 safety related application.

srm.syncor.com Sýinely Yours cdre Lask Project Manager Phone: 440-542-3611 Fax: 440-542-3661 E-Mail: alasko(.inovision.com

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-SOFTWARE VERIFICATION AND VALIDATION PLAN FOR F PROM PIN 94095603 GM- AREA MONITOR I

REV. LEVEL ECN # DESCRIPTIONIPAGES AFFECTED DATE - O--

ENGINEERING DATE ./.Dý MANUFACTURING QUALITY ASSURANCE DATE

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Table of Contents Section Description Page 1 Purpose ..................................................................................... 3 2 Referenced Documents ..................................................... 3 3 Definitions ................................................................................ 4 3.1 Definitions .................................................................................. 4 3.2 Abbreviations ......................................................................... 5 3.3 Acronyms & Notations .......................................................... 6 3.4 Documentation Names .......................................................... 6 4 Verification and Validation Overview .................................. 7 4.1 Organization .......................................................................... 7 4.2 Master Schedule ................................................................... 9 4.3 Resources Summary ............................................................. 11 4.4 Responsibilities ..................................................................... 11 4.5 Tools, Techniques, and Methodologies ................................ 12 5 Life-cycle Verification and Validation ................................ 13 5.1 Management of V & V .......................................................... 13 5.2 Acquisition Phase of V&V .................................................... 15 5.3 Planning Phase of V&V ........................................................ 15 5.4 Development Phase of V&V ................................................. 15 5.4.1 Concept Phase of V&V ........................................................ 15 5.4.2 Requirements Phase of V & V ............................................. 16 5.4.3 Design Phase of V & V ........................................................ 17 5.4.4 Implementation Phase of V & V ........................................... 18 5.4.5 Test Phase of V &V ............................................................ 19 5.4.6 Installation and Checkout Phase of V & V ............................. 20 5.5 Operation Phase of V & V ................................................... 21 5.6 Maintenance Phase of V & V............................................... 22 6 Software Verification and Validation Reporting ............... 23 6.1 Task Reporting ..................................................................... 23 6.2 V&V Phase Summary Report ............................................... 23 6.3 Anomaly Report .................................................................. 23 6.4 Final Software Verification & Validation Report .................... 23 7 Verification and Validation Administrative Procedures ....... 25 7.1 Anomaly Reporting and Resolution ...................................... 25 7.2 Task Iteration Policy ............................................................ 25 7.3 Deviation Policy ................................................................... 25 7.4 Control Procedures .............................................................. 25 7.5 Standards, Practices, and Conventions ................................ 26 APPENDIX A: List of all documents to be generated under this SVVP .............. 27 ADDENDUM 1: Firmware Flow Chart ..................................................................... 1-3 SYNCOR RADIATION M AGEM' 9 2TITLE SOFTWARE VERIFICATION AND ME 9/11/02 VALIDATION PLAN, 94095603 ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE REV 1 3044 PRODUCTION 2 of 27 90603VVP J

PURPOSE The purpose of this Verification and Validation plan is to develop a series of activities, and their associated inputs and outputs, that will demonstrate that the firmware in the P/N 94095603 EPROM, used in the Victoreen Model 956A Digital G-M Area Monitor Readout, manufactured by Syncor Radiation Measurements meets the monitor's design requirements and exhibits a high degree of reliability.

Note that although the base firmware was developed in the early 1980s, prior to the availability of the current industry software development standards, this V&V plan is intended to demonstrate that the existing firmware is suitable for use in safety related applications.

1 REFERENCE DOCUMENTS The reference standards used for guiding the preparation of this document and for SV&V implementation are listed below:

1.1 IEEE Std 7-4.3.2-1993, Standard Criteria for Digital Computers in Safety Systems of Nuclear Power Generating Stations 1.2 IEEE Std 610.12-1990, Glossary of Software Engineering Terminology 1.3 IEEE Std 729-1983, Standard Glossary of Software Engineering Terminology 1.4 IEEE Std 829-1991, Standards for Software Test Documentation 1.5 IEEE Std 830-1993, Recommended Practice for Software Requirements Specifications 1.6 IEEE Std 1012-1996, Standard for Software Verification and Validation Plans 1.7 IEEE Std 1016-1987, Recommended Practice for Software Design Descriptions 1.8 IEEE Std 1074-1991, Standard for Developing Software Life Cycle Processes 1.9 EPRI Std TR-103291-CD Handbook for Verification and Validation of Digital Systems (12/1998) 1.10 EPRI Std TR-102348, Rev. 1, Guidelines on Licensing Digital Upgrade 1.11 Syncor Radiation Management Quality Assurance Manual, QSP-1 00, Version 004, Rev.

1/2/02, Implemented 3/14/02 1.12 Syncor Radiation Management Quality Procedure QSP-205, Document Control 1.13 Syncor Radiation Management Quality Procedure QSP-05-05, Engineering Change Notice i .... TITLE SYNCOR RADIATION MANAGEMENT 9 T11/02 SOFTWARE VERIFICATION AND I VALIDATION PLAN, 94095603 DOC CTRL SHEET NO. SIZE REV ECN NO. RELEASED FOR 1 3044 PRODUCTION 3 of 27

2.11 10CFR50, Appendix B, Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants, Jan. 20, 1975 2.12 ANSI/ASME NQA1-1994, Quality Assurance Program Requirements for Nuclear Facility Applications 2 DEFINITIONS 2.1 Definitions 2.1.1 Acceptance testing - Formal testing conducted to determine whether or not the system satisfies its acceptance criteria and to enable the customer to determine whether or not to accept the system.

2.1.2 Anomaly - Anything observed in operation of the UDR that deviates from expectations based on previously verified software/firmware products or reference documents.

2.1.3 Development team - Team of qualified engineers in charge of applying software "development life cycle.

2.1.4 Developer - Member of the development team.

2.1.5 Firmware - The combination of software and data that reside in read-only memory 2.1.6 Firmware component - Assembly language module (set of functions).

2.1.7 Hardware - Physical equipment used to process, store, or transmit computer programs and data.

2.1.8 Life-cycle phase - Any period of time during software development or operation that may be characterized by a primary type of activity (such as design or testing) that is being conducted. These phases may overlap one another; for V&V purpose, no phase is concluded until its development products are fully verified.

2.1.9 Safety related firmware - Firmware for the RMS safety related equipment.

2.1.10 Software - Computer programs and data pertaining to the operation of a computer system.

- 2.1.11 -Software/firmware testing - The process of testing an integrated hardware and software/firmware system to verify that the system meets its specified requirements.

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2.1.12 Software tools - A computer program used in the development, testing, analysis, or maintenance of a program or it's documentation. Examples include CASE software, decompiler, driver, editor, flow charter, Mionitor, test case generator, or timing analyzer.

2.1.13 Software verification and validation plan - A plan for the conduct of software verification and validation.

2.1.14 SSC - Systems, Structure and Components 2.1.15 Test procedure - Documentation that is part of the test report, specifying a sequence of actions for the execution of a test 2.1.16 Traceability - The degree to which a relationship is established between two or more products of the development process, especially product having a predecessor-successor or master-subordinate relationship to one another; for example the degree to which the requirements and design of a given software component match.

2.1.17 Validation - The process of evaluating software/firmware at the end of the software development process to ensure compliance with software requirements.

2.1.18 Validator- Member of the SV&V team who carries out validation.

2.1.19 Verification - The process of determining whether or not the products of a given phase of the software/firmware development cycle fulfill the requirements established during the previous phase.

2.1.20 Verifier - Member of the project team who carries out verification.

2.2 Abbreviations ANSI- American National Standards Institute ASCII - American Standard Code for Information Interchange DOS - Disk Operating System ECN - Engineering Change Notice EPROM - Erasable Programmable- Read Only Memory IEEE - Institute of Electrical and Electronics Engineers PC - Personal Computer QA - Quality Assurance RMS - Radiation Monitoring System SRM - Syncor Radiation Management

. . RAITO

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SV&V - Software Verification and Validation UDR - Universal Digital Ratemeter VVTP - Verification and Validation Test Plan VVTR - Verification and Validation Test Report V&V - Verification and Validation 2.3 Acronyms & Notations PE - Project Engineer PM - Project Manager QE - Quality Engineer QM - Quality Management PM - Project Manager PE - Project Engineer RE - Reliability Engineer SE - Software Engineer SM - Syncor Management SRM - Syncor Radiation Management TT - Test Technician 2.4 Documentation Names SRS - Software Requirements Specification SDD - Software Design Description SVVP - Software V&V Plan VVTP - Verification and Validation Test Plan VVTR - Verification and Validation Test Report SYNCOR RADIATION MRNATOIET 9/11/02-- TITLE SOFTWARE PLAN, 94095603AND VALIDATION VERIFICATION REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 1 3044 PRODUCTION 6 of 27

3 Verification & Validation Overview The overall objective of the V&V Plan for the 94095603 firmware is to assure the program promotes a quality and highly reliable product through an independent process of technical review and evaluation. Note the firmware does not contain an operating system, and performs specific functions on a cyclic basis. A flow chart of the firmware operation is provided in Addendum 1.

The embedded and operating system software and associated tools are predeveloped, or commonly known-as legacy software. Like other predeveloped software, it is important to examine the development history to understand how the software has matured with time into the quality product it is today. When the Prom P/N 94095603 firmware was conceived, there was very little guidance in the way of industry standards to base the software development and design on. Good programming practices were used based on the objective of producing a highly reliable safety system.

As expressed in SRP 0800, Appendix 7.OA, the use of digital I&C systems presents the concern that minor errors in design and implementation can cause them to exhibit unexpected behavior. To minimize this potential problem, the design qualification of digital systems needs to focus on a high quality development process that incorporated disciplined specification and implementation of design requirements. Potential common mode failures caused by software errors are also a concern. One of the protection means against - common-mode software failures is also accomplished by an emphasis on the quality process.

The Prom P/N software was initially developed approximately 15 years ago, evolving into the present day configuration. Within this time frame the product that matured to incorporate enhancements and facility improved hardware design. The evolutionary process will be evaluated to ensure that the pre-developed (Legacy) software is sufficiently reliable for use in nuclear safety related applications.

3.1 Organization In order to ensure the program supports high quality and reliability, a process of independent technical reviews and evaluations will be performed. The project will be functionally organized under a Project Engineering Manager. The Project Manager will co-ordinate the V&V activities, schedule formal reviews, and document the results of the V&V reviews. The Project Engineering manager may also serve as a member of the V&V review team. A Quality Assurance Engineer will also participate in design reviews to ensure the overall quality of the project is maintained.

The software testing process was strengthened by designating the responsibility for the validation testing to an independent V&V engineer and technician.

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An overall project organizational chart is provided below:

Management Qualification

-Organization -Quality Assurance

-Resources -Quality Control

-Follow-up -V&V Proiect Team Development

-Concept Phase

-Design Phase

-Manufacturing Phase The project organization is described below:

Syncor Management (SM) -------------------------------------- ---Quality Management (QM)

I I---Project Manager (PM)

I I---Project Engineer (PE)

-I I -------- Independent SV&V Engineer (V&V)

I I--------- V&V Test Support Technician (V&V)

I I--- Quality Engineer (V&V)

The staff members that will participate in the V&V effort are:

Name: Function Team Resource J. Hale Systems Business Manager SM SM Zis Giatis QA Manager QM QM Judy Ellis Software Engineer V&V SE Andy Lasko Project Manager PM PM

--Dave Warner_ Reliability Engineer '_ V&V RE Dave Smith Quality Engineer V&V QE George Buck Test Technician V&V TT The Project Manager will participate in the V&V reviews, and has the authority to resolve issues raised during the V&V.

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3.2 Master Schedule The V&V project is presently planned for completion on an expedited basis, over a 3 month period. At the end of the process, a formal SV&V report will be issued. Progress will be reported on a periodic basis, typically monthly.

The SVV overview shown below summarizes the life-cycle model used for the project. It is based on the sample model defined in IEEE 1012, except as follows:

-For this project, the design phase has been previously completed, but has not been formally documented. This plan is designed to document the firmware that has been designed. The product is presently in the Maintenance phase.

-Installation, checkout, and operation are performed by the user Major schedule milestones are listed below:

Complete SRS Sep. 30,2002 Complete SDD Oct. 15, 2002 Complete VVTP Oct. 30, 2002 Complete VVTR Nov. 1,2002

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3.3 Resources Summary Resources available for this project will include:

3.3.1 Project Manager 3.3.2 Project Engineer 3.3.3 Software/Firmware Engineer 3.3.4 Test Technician 3.3.5 Quality Assurance Engineer In addition to the above, the following equipment will be required:

3.3.6 1, 956A-201 UDR 3.3.7 1, Signal Generator 3.3.8 1, Digital Voltmeter 3.3.9 1, 94095603 EPROM 3.4 Responsibilities 3.4.1 The SRM Project Manager/Project Engineer is responsible for the implementation of this plan, identifying requirements, resolving problems, and ensuring compliance to the requirements identified by SRM personnel and any subcontractors employed.

3.4.2 The Software Engineer is responsible for reviewing the code, and providing the documents identified in the SV&V Plan. The Software Engineer is also responsible for implementing the V&V tests.

3.4.3 The Test Technician is responsible for assisting the Software Engineer with the V&V tests.

3.4.4 The Quality Assurance Engineer is responsible for reviewing the documents, and ensuring the quality requirements of the SV&V Plan are maintained.

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3.5 Tools, Techniques, and Methodologies The methods used in the V&V process will include review by cognizant engineering personnel, independent verification, and formal reviews.

The tools that will be used for the V&V process are as foiiows:

Document Preparation:

-Networked PC, Microsoft Word for Windows

-The documentation provided shall be written on a PC using a word processor program; e.g., Microsoft Word or a flat ASCII text editor, or similar. Each page of the document shall have a page header. The page header shall include the document name, part number, revision level and page number.

Target Hardware

-Model 956A-201 UDR with 94095603 EPROM Test Signal Generator Software Testing

-American Arium Assembler/Linker

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4 Life-Cycle Verification and Validation Outputs from phase tasks are used to develop corresponding V&V phase summary reports and are ongoing inputs to the SVVR. Outputs of V&V tasks become inputs to subsequent life-cycle V&V tasks.

5.1 Management of V&V 4.1.1 V&V Tasks, Inputs/Outputs, Resources and Responsibilities V & V Tasks Required Inputs Required Outputs Resources Responsibilities Software Verification and SVVP (previous update) SVVP and Updates PM Validation Plan (SVVP) Contract Generation. Generate an SVVP for all life cycle processes. The SVVP may require updating throughout the life cycle. Outputs of other activities are inputs to the SVVP.

Baseline Change Assessment. SVVP Updated SVVP Task PM Evaluate proposed software Proposed Changes Report(s) changes (e.g., anomaly Risks identified by V & V Baseline Change connections and requirement Tasks Assessment changes) for effects on Anomaly Report(s) previously completed V & V tasks. Plan iteration of affected tasks or initiate new tasks to address software baseline changes or iterative development processes. Verify and validate that the change is consistent with system requirements and does not adversely affect requirements directly or indirectly. An adverse effect is a change that could create new system hazards and risks or impact previously resolved hazards and risks Management Review of V & SVVP and Updates Updated SVVP PM, SM, QE V. Review and summarize the Task Report(s)

V & V effort to define changes Recommendations to V & V tasks or to redirect V & V Activity Summary the V & V effort. Recommend Reports whether to proceed to the next Recommendations to the set of V & V and development V&V Final Report life cycle activities, and provide task reports, anomaly reports, and V&V Activity Summary Reports to the organizations identified in the SVVP. Verify that all V & V tasks comply with task requirements defined in the SVVP.

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4.1.2 Risks The risks identified to date are:

4.1.2.1 V&V personnel requires capabilities and attitudes that differ from those encountered during software development.

Impact: A reduction in the motivation of the verifier/validator may have a negative effect on the quality of the product.

Action: Periodically, (each week), a meeting is held between the members of the V&V team and project manager. This meeting promotes teamwork:

- Each member of the V&V team to report work progress, to express any technical and personal communication problems encountered.

-Anticipation of events before they occur thus avoiding technical and motivational problems.

4.1.2.2 The projection of the workload involved in the V&V tasks may be incorrect (over- or underestimated, workload not well distributed).

Impact: adverse effect on schedule Action: The periodic monitoring (monthly) perceives these shortcomings and defines corrective actions.

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4.2 Acquisition Support (Acquisition Process) - Not Required; Customer inputs are specified in purchase documents, and customer review/approval of SVVP, SRS, and SDD will be obtained.

4.3 Planning (Supply Process) - Not Required; See 5.2 above 4.4 Development Process 4.4.1 Concept Phase of V&V 4.4.1.1 V&V tasks, Inputs/Outputs, Resources and Responsibilities V & V Tasks Required Inputs Required Outputs Resources Responsibilities Concept Documentation Concept Documentation Task Report- PM, QE, SM, SE Evaluation. Verify that the User Needs Concept concept documentation Acquisition Needs Documentation satisfies user needs and is Evaluation consistent with acquisition Anomaly Report(s) needs. Identify major constraints of interfacing systems and constraints or limitations of proposed approach. Assess criticality of each software item.

4.4.1.2 Risks 4.4.1.2.1 Product performance may not fully envelope customer requirements.

Impact: Be aware that initial performances may fall short of meeting all customer expectations.

Action: Anomalies will be identified and reviewed with the customer for ultimate disposition.

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4.4.2 Requirements Phase of V&V 4.4.2.1 V&V tasks, Inputs/Outputs, Resources and Responsibilities V & V Tasks Required Inputs Required Outputs Resources Responsibilities Traceability Analysis. Trace the Concept Documentation Task Report- PM, QE, SM, SE software requirements (SRS) to SRS Traceability Analysis system requirements (Concept Anomaly Report(s)

Documentation) and system requirements. Analyze identified relationships for correctness, consistency, completeness, and accuracy.

Software Requirements Concept Documentation Task Report(s)-Software PM, QE, SM, SE Evaluation. Evaluate the SRS Requirements requirements (e.g., functional, Evaluation capability, interface, Anomaly Report(s) qualification, safety, security, human factors, data definitions, user documentation, installation and acceptance, user operation, and user maintenance) of the SRS for correctness, consistency, completeness, accuracy, readability, and testability.

Interface Analysis. Venfy and Concept Documentation Task Report(s) - PM, QE, SM, SE validate that the requirements for SRS Interface software interfaces with Analysis Anomaly hardware, user, operator, and Report(s) other systems are connected, consistent, complete, accurate, and testable Criticality Analysis. Review and Task Report(s ) - Task Report(s ) - PM, QE, SM, SE update any existing criticality Criticality Criticality analysis results from the prior SRS SRS Criticality Task Report using the SRS.

System V & V Test Plan Concept Documentation Anomaly Report(s) PM, QE, SM, SE Generation and Verification. (For (System requirements) System V&V Test Plan Software Integrity Levels I and 2) SRS Verify that developer's System Test User Documentation Plans conform to Project defined test System Test Plan document purpose, format, and content (eg., see IEEE Std 829 1991). Validate that the System Test Plan satisfies the following criteria:

1) test coverage of system requirements; 2) appropriateness of test methods and standards used; 3) conformance to expected results; 4) feasibility of system qualification testing; and 5) capability to be operated and maintained.

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4.4.3 Design Phase of V&V 4.4.3.1 V&V tasks, Inputs/Outputs, Resources and Responsibilities V & V Tasks Required Inputs Required Outputs Resources Responsibilities Traceability Analysis. Trace SRS Task Report(s)- PM, QE, SM, SE design elements (SDD), to SDD Traceability Analysis requirements (SRS), and Anomaly Report(s) requirements to design elements. Analyze relationships for correctness, consistency, and completeness..

Software Design Evaluation. SRS Task Report(s)- PM, QE, SM, SE Evaluate the design elements SDD Software Design (SDD) for correctness, consistency, Design Standards (e.g., Evaluation completeness, accuracy, readability, standards, practices, Anomaly Report(s) and testability, and conventions)

Interface Analysis. Verify and Concept Documentation Task Report(s) - PM, QE, SM, SE validate that the software design (System requirements) Interface Analysis interfaces with hardware, user, SRS Anomaly Report(s) operator, software, and other SDD systems for correctness, consistency, completeness, accuracy, and testability.

V & V Test Design Generation SDD System V&V Test PM, QE, SM, SE and Verification. 1) system User Documentation Design(s) Acceptance testing; and 2) acceptance testing. Test Plans V&V Test Design(s)

Continue tracing required by the V Test Designs Anomaly Report(s)

& V Test Plan. Verify that the V&V Test Designs comply with Project defined test document purpose, format, and content (e.g.,

see IEEE Std 829-1991). Validate that the V & V Test Designs satisfy the criteria in V&V tasks.

4.4.3.2 Risks Not applicable SYNCOR RADIATION MANAGEMENT 9/11/02 VALIDATION PLAN, 94095603 REV EN NO. RELEASED FORIDOC 94095603VVP 11 3044 1PRODUCTION 17 of 27 4963V

4.4.4 Implementation Phase of V & V 4.4.4.1 V&V tasks, Inputs/Outputs, Resources and Responsibilities The code will be reviewed for conventional indenting formatting. File headers, which includes the file name, the author, a description/purpose, definition of variables, sub-routines called, and the modification history, will be used for module modifications.

V & V Tasks Required Inputs Required Outputs Resources Responsibilities Traceability Analysis. Trace the SDD Task Report(s) - PM, QE, SM, SE source code components to Source Code Traceability Analysis corresponding design Anomaly Reports specifications(s), and design specification(s) to source code components. Analyze identified relationships for correctness, consistency, and completeness Source Code and Source Code Source Code Task Report(s) - PM, QE, SM, SE Documentation Evaluation. SDD Source Code and Evaluate the source code Coding Standards Source Code components (Source documentation) User Documentation Documentation for correctness, consistency, Evaluation completeness, accuracy, readability, Anomaly Report(s) and testability.

Interface Analysis. Verify and Concept Documentation Task Report(s) - Interface PM, QE, SM, SE validate that the software source SDD Analysis code interfaces with hardware, user, Source Code Anomaly Report(s) operator, software, and other User Documentation systems for correctness, consistency, completeness, accuracy, and testability.

V&V Test Case Generation and SRS System V&V Test Cases PM, QE, SM, SE Verification. Verify that the SDD Acceptance V&V Test developer's Test Cases conform to User Documentation Cases Project defined test document Test Design Anomaly Report(s) purpose, format, and content. Test Cases Validate that the developer's Test Cases satisfy the criteria for system and acceptance testing.

V&V Test Procedure Generation SRS System V&V Test PM, QE, SM, SE and Verification. Verify that the SDD Procedures developer's Test Procedures User Documentation Anomaly Report(s) conform to Project defined test Test Cases document purpose, format, and Test Procedures content. Validate that the developer's Test Procedures satisfy the criteria in V&V tasks for system and acceptance testing.

Hazard Analysis. Verify that the Source Code Task Report(s) - Hazard PM, QE, SM, SE implementation and associated data SDD Analysis elements correctly implement the Hazard Analysis Report Anomaly Report(s) critical requirements and introduces no new hazards. Update the hazard analysis.

Risk Analysis. Review and update Source Code Task Report(s) - Risk PM, QE, SM, SE risk analysis using prior reports. Hazard Analysis Report Analysis Provide recommendations to V&V task results Anomaly Report(s) eliminate, reduce or mitigate the risks.

4.4.4.2 Risks Not Applicable 911..1 .. -TITLE SYNCOR RADIATION N-GEM --- TIE2 SOFTWARE VERIFICATION AND I VALIDATION PLAN, 94095603 ECN NO. RELEASED FOR DO I 94095603VVP SIZ REV 11 3044 1PRODUCTION 118 of 27 1

4.4.5 Test Phase of V & V 4.4.5.1 V&V tasks, Inputs/Outputs, Resources and Responsibilities V & V Tasks Required Inputs Required Outputs Resources Responsibilities Traceability Analysis. Analyze V&V Test Plans Task Report(s) - PM, QE, SM, SE relationships in the V&V Test Plans, V&V Test Designs Traceability Analysis Designs, Cases, and Procedures for V&V Test Procedures correctness and completeness. For Anomaly Report(s) correctness, verify that there is a valid relationship between the V&V Test Plans, Designs, Cases, and Procedures. For completeness, verify that all V&V Test Procedures are traceable to the V&V Test Plans.

Acceptance V&V Test Procedure SDD Acceptance V&V Test PM, QE, SM, SE, Generation and Verification. Source Code Procedures RE Verify that the developer's User Documentation Anomaly Report(s)

Acceptance Test Procedures Acceptance Test Plan conform to Project defined test Acceptance Test document purpose, format, and Procedures content.

System V&V Test Execution and Source Code Test Report(s) - Test PM, QE, SM;-SE, Verification. Use the developer's Executable Code Results RE, "IT system test results to verify that the User Documentation software satisfies the test acceptance Acceptance Test Plan Anomaly Report(s) criteria. Acceptance Test Procedures Acceptance Test Results Hazard Analysis. Venfy that the Source Code Task Report(s) - Hazard PM, QE, SM. SE test instrumentation does not Executable Code Analysis introduce new hazards. Update the Test Results hazard analysis Hazard Analysis Report Anomaly Report(s)

Rick Analysis. Review and update Hazard Analysis Report Task Report(s) - Risk PM, QE, SM, SE risk analysis using prior task reports. V&V task results Analysis Provide recommendations to eliminate, reduce, or mitigate the Anomaly Report(s) risks.

4.4.5.2 Risks Not Applicable

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4.4.6 Installation and Checkout Phase of V & V 4.4.6.1 V&V tasks, Inputs/Outputs, Resources and Responsibilities V & V Tasks Required Inputs Required Outputs Resources Responsibilities Installation Configuration Audit. Installation Package (e.g.. Task Report(s) - PM, QE, SM, SE Verify that all software products Source Code, Executable Installation required to correctly install and Code, User Configuration Audit operate the software are present in Documentation, SDD, Anomaly Report(s) the installation package. Validate SRS, Concept that all site-dependent parameters or Documentation, conditions to verify supplied values Installation Procedures, are correct. site-specific parameters, Installation Tests, and Configuration Management Data)

Installation Checkout. Conduct User Documentation Task Report(s) - PM, QE, SM, SE analyses or tests to verify that the Installation Package Installation installed software corresponds to the Checkout software subjected to V & V. Verify Anomaly Report(s) that the software code and databases initialize, execute, and terminate as specified. In the transition from one version of software to the next, the V & V effort shall validate that the software can be removed from the system without affecting the functionality of the remaining system components. The V & V effort shall verify the requirements for continuous operation and service during transition, including user notification.

Hazard Analysis. Verify that the Installation Package Task Report(s) - PM, QE, SM, SE installation procedures and Hazard Analysis Report Hazard Analysis installation environment does not Anomaly Report(s) introduce new hazards Update the hazard analysis Risk Analysis. Review and update Installation Package Task Report(s) - Risk PM, QE, SM, SE risk analysis using prior task reports. Supplier Development Analysis Anomaly Plans and Schedules Report(s)

V&V Task Results V & V Final Report Generation. V & V Activity Summary V&V Final Report PM, QE, SM, SE Summarize in the V & V final report Report(s) the V&V activities, tasks and results, including Report (s) status and disposition of anomalies..

4.4.6.2 Risks Not Applicable

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4.5 Operation Phase of V & V 4.5.1 V&V tasks, Inputs/Outputs, Resources and Responsibilities V & V Tasks Required Inputs Required Outputs Resources Responsibilities Evaluation of New Constraints. SVVP Task Report(s) - PM, QE, SM, SE Evaluate new constraints (e.g., New constraints Evaluation of New operational requirements, platform Constraints characteristics, operating environment) on the system or software requirements to verify the applicability of the SVVP. Software changes are maintenance activities (see 5.6 1).

Proposed Change Assessment. Proposed Changes Task Report(s)- PM, QE, SM, SE Assess proposed changes (e.g., Installation Package Proposed Change modifications, enhancements, or Assessment additions) to determine the effect of the changes on the system.

Determine the extent to which V &

V tasks would be iterated.

Operating Procedures Evaluation. Operating Procedures Task Report(s) - PM, QE, SM, SE Verify that the operating procedures User Documentation Operating Procedures are consistent with the user Concept Documentation Evaluation documentation and conform to the Anomaly Report(s) system requirements Hazard Analysis. Verify that the Operating Procedures Task Report(s) - Hazard PM, QE, SM, SE operating procedures and Hazard Analysis Report Analysis operational environment does not Anomaly Report(s) introduce new hazards. Update the hazard analysis.

Risk Analysis. Review and update Installation Package Task Report(s) - Risk PM, QE,.SM, SE risk analysis using prior task Proposed Changes Analysis Anomaly reports. Provide recommendations Hazard Analysis Report Report(s) to eliminate, reduce, or mitigate the Supplier Development risks. Plans and Schedules Operation problem reports V&V task results Installation and Operation. These Installation Package, Anomaly Report PM, QE, SM, SE,,

tasks are assigned to Syncor Concept Documentation, QM Radiation Management. SRS, Source Code Listings, Executable Code, User Documentation, SVVP, SVVR 4.5.1.1 Risks Not Applicable

...... .... .TITLE I SOFTWARE VERIFICATION AND REV SYNCOR RADIATION MANAGEMENT ECN NO. RELEASED FOR DOG CTRL I I 9/11/02 7SHEET NO6I VAIAINPA,9050 VALIDATIONEPLANA94095603 1 3044 PRODUCTION 21 of 27 4563V

I 4.6 Maintenance Phase of V & V 4.6.1 V&V tasks, Inputs/Outputs, Resources and Responsibilities V & V Tasks Required Inputs Required Outputs Resources Responsibilities SVVP Revision. Revise the SVVP SVVP Updated SVVP PM, QE, SM, SE to comply with approved changes. Approved Changes Installation Package Proposed Change Assessment. Proposed Changes Task Report(s)- PM, QE, SM, SE Assess proposed changes (e.g., Installation Package Proposed Change modifications, enhancements, or Assessment additions) to determine the effect of the changes on the system.

Determine the extent to which V &

V tasks would be iterated.

Anomaly Evaluation. Evaluate the Anomaly Report(s) Task Report(s) - PM, QE, SM, SE effect of software operation Anomaly Reports anomalies.

Retirement Assessment For Installation Package Task Report(s) - PM, QE, SM, SE software retirement, assess whether Approved Changes Retirement Assessment the installation package addresses:

software support, impact on existing Anomaly Report(s) systems, software archiving, transition to a new software product, and user notification Hazard Analysis. Venfy that Proposed Changes Task Report(s) - Hazard PM, QE, SM, SE software modifications correctly Installation Package Analysis implement the critical requirements Hazard Analysis Report and introduce no new hazards Anomaly Report Update the hazard analysis.

Risk Analysis. Review and update Installation Package Task Report(s) - Risk PM, QE, SM, SE risk analysis using prior task Proposed Changes Analysis Anomaly reports. Provide recommendations Hazard Analysis Report Report(s) to eliminate, reduce, or mitigate the Supplier Development risks. Plans and Schedules Operation problem reports V&V task results 4.6.1.1 During the maintenance phase, the developers may be assigned to other projects and may not be readily available to assist.

Impact: Lack of resources for immediate response to problems.

Action: Plan that resources familiar with the development be available to complete the maintenance phase work.

-' .... - TITLE SOFTWARE VERIFICATION AND SYNCOR RADIATION MANAGEMENT 9/11/02 VALIDATION PLAN, 94095603 REV ECN NO. RELEASED FOR 000 CTRL ISHEET NO.949563VP IZE 1 1-3044 1PRODUCTION 122 of 27 V 1~O3

5 Software Verification and Validation Reporting This section describes how the results of implementing the Plan will be documented.

5.1 Task Reporting A report of each of the Tasks/Sub-tasks performed in the SVVP shall be developed and issued as they are completed. Listed below are the different reports to be generated.

Management Progress reporting and internal notes Documentation Evaluation Documentation checking forms with review reports Software/Firmware Testing Software test report Acceptance Testing Acceptance Test Report Others Meeting reports or internal notes 5.2 V&V Phase Summary Report A phase Summary Report shall summarize the results of V&V tasks performed in each of the following life-cycle phases: Requirements, Design, Implementation and Test.

Each V&V Phase Summary report shall contain the following:

5.2.1 Description of SV&V tasks performed 5.2.2 Summary of test results 5.2.3 Summary of anomalies and resolutions 5.2.4 Recommendations 5.3 Anomaly Report An anomaly report shall document each anomaly detected in the SV&V. The report content and administrative controls are provided in 7.1 5.4 Final Software Verification and Validation Report The final report shall include a summary of the V&V activities and results. Deviation from the SV&V plan will be noted. Both positive and negative findings will be reported.

Based on the results of the V&V, a conclusion and recommendations for further actions will be provided.

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The format of the final report will be as follows:

Summary of each phase, to include:

5.4.1 Task results 5.4.2 Anomalies 5.4.3 Anomaly Resolution 5.4.4 Overall Quality Assessment 5.4.5 Conclusions 5.4.6 Recommendations SYNCOR RADIATION MNGE-M-ENTT 9/11/02 SOFTWARE VERIFICATION AND I VALIDATION PLAN, 94095603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 1 3044 PRODUCTION 24 of 27 949603VVP

6 Verification and Validation Administrative Procedures 6.1 Anomaly Reporting and Resolution As identified, anomalies will be written, and forwarded to the PM for logging. Each anomaly will be sequentially numbered by the PM.

Each anomaly will be presented to the review team for discussion and resolution. If mutual agreement cannot be reached, the PM will resolve the anomaly, and the process completed. Based on the severity of the anomaly, the originator may stop work, and request an immediate review meeting. Otherwise, the anomaly will be reviewed at the completion of the current V&V task, or phase.

6.2 Task Iteration Policy A change request regarding a version results in the following processing with respect to the SV&V life cycle:

6.2.1 Analysis of the impact of the change (identification of items involved and the degree of the modification) 6.2.2 Repetition of the V&V cycle on items which change in order to check that the modifications have been taken into account in version n+1 6.3 Deviation Policy When a deviation to the SVVP is identified, generation of an ECN, as described in QSP 05-08 will be required.

6.4 Control Procedures All documents produced under the V&V program will be controlled and stored as any other engineering document, as described in QSP-05-08.

SRM classifies firmware as a drawing and therefore, follows SRM QSP-205 and QSP 05-08, Engineering/Document Change Notice Procedure, for its control. To this extent, the problem is documented using the Engineering Change Notice (ECN) procedure and sent to the Project Manager. Upon evaluation, the ECN will: 1) Be approved and implemented; 2) Be forwarded to the appropriate department for further action or; 3)

Be returned with an explanation. Upon resolving the problem, the applicable documentation will be revised, and the corrected firmware will be released using the Engineering Change Notice (ECN).

Problems relating to monitor operation must be formally directed to the cognizant project engineer or Project Manager in the form of a field problem report. The format of the field problem report is not critical; however sufficient information (i.e., tag number, description of problem, operating mode, results observed, etc.) must be provided to permit the problem to be reproduced. The project engineer, or manager, will be responsible for resolving the problem report and, if required, initiate an internal EON (per QSP 08) to revise the applicable firmware and documentation as required in this SVVP. Testing of revised firmware will be performed on hardware similar to that originally tested on.

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Repetition of the affected portion of the V&V program will be required for and change affecting software that has been formally subjected to a V&V program.

6.5 Standards, Practices, and Conventions Refer to Section 4.0 i . ... TITLE SYNCOR RADIATION MANAGE MENT 9111/02 SOFTWARE VERIFICATION AND A 9VALIDATION PLAN, 94095603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 94095603VVP SIZE 1 3044 PRODUCTION 26 of 27

APPENDIX A: List of all documents to be generated under this SVVP Document Number:

Description:

94095603SDD Software Design Description 94095603SRS Software Requirements Specification 94095603VVTP Verification and Validation Test Procedure 94095603VVTR Verification and Validation Test Report

--I - TITLE SYNCOR RADIATION MANAGEMENT 9/11/02 SOFTWARE VERIFICATION AND I VALIDATION PLAN, 94095603 RELEASED FOR DOC CTRL SHEET NO. SIZE REV ECN NO.

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ADDENDUM I - Firmware Flowchart, Page 1 of 3 pages

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uierv S.aa k cuuao o Incteruts 2comdateiceciod aataenmr SeSeriie dache crrettons 6 Gt S.EtaC alibrate etruie o nalogedta 8 Oulx*

iee values 4 Daclt isplay 10 Process Checksource button request

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TITLE SOFTWARE VERIFICATION AND VALIDATION PLAN, 94095603 NO.

94095603VVP-

44S4S1SZ7 10/28/02 OS:S6pm P. 002 INDYISION INOVISION 4403491927 SOFTWARE REQUIREMENTS SPECIFICATION FOR PROM PIN 94095603 GM- AREA MONITOR I

REV. LEVEL ECO # DESCRIPTIONIPAGES AFFECTED 2 3076 Add backlight description, 3.1.1.1.2; Add optional to 3.1.3.1 and 3.1.4.1; Add clock Aux interrupts to 3.1.3.2; Change range to 1.OE-2 to 1.0E+3, 3.2.1.2.1.11; Correct Delete relay operation, de-energize to trip, 3.2.1.3.2.1.2.4.4 and 3.2.1.3.2.1.2.5.2; E0002 and E000B. 3.6.3 1 3052 Initial Release ENGINEERING DATE fn-35--oZ-DATE /O-2--$- OZ_

MANUFACTURING

.. DATE I QUALITY ASSURANCE SYNCOR Radiation Management 10/23/02 TITLE SOFTWARE REQUIREMENTS SPECIFICATION 94095603 SHEET NO. SIZE REV ECO NO. RELEASED FOR DOC CTRL a-Y4't, 1 of 10 PLN 2 3076 PRODUCTION

Table of Contents Section:

Description:

Page:

1. Introduction ............................................................................ 3 1.1. Purpose ................................................................................. 3 1.2. Scope ..................................................................................... 3 1.3. Definitions, acronyms, and abbreviations ....................................... 3 1.4. Reference ............................................................................... 4 1.5. Overview ................................................................................. 4

2. Overall Description .................................................................. 5 2.1. Product perspective ................................................................... 5 2.2. Product functions ..................................................................... 5 2.3. User characteristics ................................................................... 5 2.4. Constraints ............................................................................. 5 2.5. Assumptions and dependencies ................................................... 5 2.6. General Constraints ................................................................... 5

3. Specific functional requirements ....................................................... 6 3.1. External interface requirements ................................................... 6 3.1.1. User interfaces ......................................................................... 6 3.1.2. Hardware interfaces ................................................................. 6 3.1.3. Software interfaces ................................................................... 6 3.1.4. Communications interfaces ......................................................... 6 3.2. System features ....................................................................... 7 3.3. Performance requirements ......................................................... 9 3.4. Design constraints ..................................................................... 9 3.5. Software system attributes ......................................................... 10 3.6. Other requirements ..................................................................... 10 DATE TITLE SOFTWARE REQUIREMENTS SYNCOR Radiation Management 10/23/02 SPECIFICATION, 94095603 REV ECO NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 6a 2 of 10 94095603SRS PLN

1. Introduction for This Software Requirements Specification is being developed to capture the firmware requirements PROM PIN 94095603, used in the Model 956A G-M Digital Area Monitor Readout and to provide a benchmark to which designs will be validated.

1.1 Purpose of this document The purpose of this document is to specify the functional and performance requirements for the Victoreen Model 956A Universal Digital Ratemeter (UDR), in accordance with Reference 1.4.2.

1.2 Scope of this document The requirements were derived from the Installation, Operation, and Maintenance Instruction Manual for the Area Monitoring System Model 955A, published 5/96 by Victoreen, Inc, in accordance with Reference 1.4.2 and 1.4.4.

1.3 Definitions, acronyms, and abbreviations 1.3.1 Definitions 1.3.1.1 Checksource - radioactive source used to check detector and UDR operation 1.3.1.2 Contract - A legally binding document agreed upon by the customer and supplier.

This includes the technical and organizational requirements, cost and schedule for a product. A contract may also contain informal but useful information such as the commitments or expectations of the parties involved.

1.3.1.3 Customer - The person, or persons, who pay for the product and usually (but not necessarily) decide the requirements. In the context of this recommended practice the customer and the supplier may be members of the same organization.

1.3.1.4 Detector-A plant mounted device that measures gamma radiation and converts it into an electrical signal 1.3.1.5 Fail safe - A condition for a relay where in normal operation the relay is energized 1.3.1.6 G-M - Geiger-Mueller tube radiation detector 1.3.1.7 Remote display device - An electronic device that displays information in a central location from a sensor, or detector, located within the plant 1.3.1.8 Set point - configuration parameter 1.3.1.9 Supplier - The person, or persons, who produce a product for a customer. In the context of this document, the customer and the supplier may be members of the same organization.

1.3.1.10 User-The person, or persons, who operate or interact directly with the product.

The user(s) and the customer(s) are often not the same person(s).

1.3.1.11 VICO loop - Proprietary communication protocol 1.3.1.12 Watchdog Timer - A timer that must be reset on a repetitive basis, or it will time out and take a prescribed action.

1.3.2 Acronyms 1.3.2.1 DPDT - Double Pole Double Throw 1.3.2.2 EPRI - Electric Power Research Institute 1.3.2.3 IEEE - Institute of Electrical and Electronics Engineers 1.3.2.4 PROM - Programmable Read Only Memory 1.3.2.5 QAM - Quality Assurance Manual 1.3.2.6 RAM - Dynamic Random Access Memory 1.3.2.7 SPDT - Single Pole Double Throw 1.3.2.8 UDR - Universal Digital Ratemeter, Model 956A DATE T ITLE SOTAERQIMNS

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t 1.3.3 Abbreviations 1.3.3.1 PIN - Part Number 1.3.3.2 V&V - Verification and Validation 1.4 References 1.4.1 IEEE Std 610.12-1990, Glossary of Software Engineering Terminology 1.4.2 IEEE Std 830-1993, Recommended Practice for Software Requirements Specifications 1.4.3 IEEE Std 1074-1991, Standard for Developing Software Life Cycle Processes 1.4.4 EPRI TR-103291 Handbook for Verification and Validation of Digital Systems (12/1998) 1.4.5 Software Verification and Validation Plan for Prom PIN 94095603, P/N 94095603WP 1.4.6 SYNCOR QAM P/N QSP-100 Version 4.

1.5 Overview The firmware described in this specification is specifically intended for use in the Model 956A UDR for the detection and measurement of ionizing radiation. When used with a Model 897A series G-M detector, the system monitors gamma radiation over a 5-decade range and provides indication when the radiation level increases above a high alarm set point, a warn alarm set point, an over range set point, or drops below a fail set point. Analog outputs are available for trend display on a strip chart recorder or a computer. The UDR also provides display, control, and annunciation functions. When equipped with the Model 942-200-80 Communications Loop Option circuit board, serial communications with a CRT terminal for status information, set point edit, and historical data retrieval is available.

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2. Overall Description This section describes the general factors that affect the firmware and its requirements.

2.1 Product Perspective The Victoreen Model 956A UDR is a remote display device.

2.2 Product Functions The Victoreen Model 956A UDR continuously displays radiation levels, indicates alarm status, updates analog outputs, and provides control and annunciation functions based on signals it receives from a specific detector. The UDR also provides a detector calibration and test function.

2.3 User Characteristics The Victoreen Model 956A UDR should be used only by persons who have been trained in the proper interpretation of its readings and the appropriate safety procedures to be followed in the presence of radiation.

2.4 Constraints The user needs to have the radiation levels continuously displayed, indication when alarm conditions exist, and be able to verify that the UDR is functioning correctly.

2.5 Assumptions and Dependencies This firmware is specifically intended for use in the Model 956A UDR for the detection and measurement of ionizing gamma radiation. The system monitors gamma radiation over a 5-decade range and provides indication when the radiation level increases above a high alarm set point, a warn alarm set point, an over range set point, or decreases below a fail set point. The UDR must provide display, analog output, control, and annunciation functions.

2.6 General Constraints All software source modules are written in Motorola 6802 assembly code using an ASCII text editor on a DOS based PC DATE TITLE SOFTWARE REQUIREMENTS SYNCOR Radiation Management 10/23/02 -SPECIFICATION, 94095603 REV ECO NO. RELEASED FOR DOC CTRL SHEET NO. S.ZE 2 3076 PRODUCTION 6?(%f 5 of 10 94095603SRS PLN

3. Specific Functional Requirements This section contains all the software requirements for the firmware.

3.1 External interface requirements 3.1.1 User interfaces 3.1.1.1 Front panel consisting of:

3.1.1.1.1 Seven segment, 3 digit display 3.1.1.1.2 3, Backlights, mR/h, R/h, and kR/h 3.1.1.1.3 5, Status indicators 3.1.1.1.4 24 segment Bargraph 3.1.1.1.5 4, Pushbuttons 3.1.1.1.5.1 Check Source 3.1.1.1.5.2 Alarm Acknowledge 3.1.1.1.5.3 HIGH alarm set point display 3.1.1.1.5.4 WARN alarm set point display 3.1.1.2 16, Position Function select switch 3.1.1.3 3, Data entry pushbuttons 3.1.1.3.1 Digit 3.1.1.3.2 Value 3.1.1.3.3 Enter 3.1.1.4 Calibration mode is entered manually by turning rotary set point switch to position 8 and pressing ENTER button 3.1.1.5 When is calibration mode, another calibration can be executed by pressing the ENTER key 3.1.1.5.1.1 System will again display calibration time for editing 3.1.1.6 Calibration in process can be stopped by pressing the ENTER key 3.1.1.7 Calibration can be stopped by moving the rotary switch to a position other than 8 3.1.2 Hardware interfaces 3.1.2.1 Power on/off button 3.1.2.2 Provide I analog output of 0 - 10 Vdc 3.1.2.3 Provide 2 analog outputs of 4 - 20 mA 3.1.2.4 Monitor shall have one failsafe SPDT high alarm output 3.1.2.5 Monitor shall have one failsafe DPDT warning output 3.1.2.6 Monitor shall have one failsafe DPDT fail output 3.1.3 Software interfaces 3.1.3.1 Message queues (optional) 3.1.3.2 Interrupts (clock interrupts) 3.1.4 Communications interfaces 3.1.4.1 RS-232 (optional) 3.1.4.2 VICO loop (optional) 3.1.4.3 RS-485 (optional)

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2" ,.

3.2 System features 3.2.1 Continuously monitor radiation 3.2.1.1 To inform the user as to the presence and level of radiation within the monitored equipment or area.

3.2.1.2 Normal operation 3.2.1.2.1 Associated functional requirements 3.2.1.2.1.1 The radiation value is displayed as a three digit number 3.2.1.2.1.2 Backlit insert will display engineering units in mRPH, R/h, or kR/h.

3.2.1.2.1.3 The bargraph will display the value on the fixed mR/h scale 3.2.1.2.1.4 Any indicator lights that are on will be green 3.2.1.2.1.5 Analog outputs will track the displayed value.

3.2.1.2.1.6 Alarm outputs will be active.

3.2.1.2.1.7 The Warn relay will operate in Fail Safe Mode.

3.2.1.2.1.8 The High relay will operate in Fail Safe Mode.

3.2.1.2.1.9 The Fail relay will operate in Fail Safe Mode.

3.2.1.2.1.10 The serial port (optional) 3.2.1.2.1.11 Operates over a range of 1.OOE-2 to 1.00E+3 mRPh 3.2.1.3 Inform when a predetermined limit is exceeded 3.2.1.3.1 Radiation value is below minimum.

3.2.1.3.1.1 Associated functional requirements 3.2.1.3.1.1.1 Fail outputs will be activated upon following conditions 3.2.1.3.1.1.1.1 No counts 3.2.1.3.1.1.1.2 Loss of power 3.2.1.3.1.1.1.3 MPU failure (Watch dog timer) 3.2.1.3.1.1.1.4 Detector anti-Jam occurs 3.2.1.3.2 Radiation value exceeds predetermined set point 3.2.1.3.2.1 Associated functional requirements 3.2.1.3.2.1.1 WARN condition:

3.2.1.3.2.1.1.1 Warn alarm condition is true when the display dose rate is greater than or equal to the WARN alarm set point.

3.2.1.3.2.1.1.2 WARN alarm logic is fail-safe 3.2.1.3.2.1.1.3 WARN alarm is manual reset 3.2.1.3.2.1.1.4 When WARN alarm is tripped:

3.2.1.3.2.1.1.4.1 Amber WARN alarm indicator begins flashing 3.2.1.3.2.1.1.4.2 Bagraph goes to amber 3.2.1.3.2.1.1.4.3 WARN alarm relay coil de-energizes 3.2.1.3.2.1.1.5 When WARN alarm is acknowledged:

3.2.1.3.2.1.1.5.1 WARN alarm indicator will be on steady 3.2.1.3.2.1.1.5.2 WARN relay will change state when the radiation value drops below the WARN alarm set point 3.2.1.3.2.1.1.6 The WARN alarm is normally inhibited in Check Source Mode 3.2.1.3.2.1.2 HIGH ALARM condition 3.2.1.3.2.1.2.1 HIGH alarm condition is true when the display dose rate is greater than or equal to the HIGH alarm set poinL 3.2.1.3.2.1.2.2 HIGH alarm logic is fail safe 3.2.1.3.2.1.2.3 HIGH alarm is manual reset 3.2.1.3.2.1.2.4 When HIGH alarm is tripped:

3.2.1.3.2.1.2.4.1 Red HIGH alarm indicator begins flashing 3.2.1.3.2.1.2.4.2 Bargraph goes to red 3.2.1.3.2.1.2.4.3 HIGH relay coil de-energizes 3.2.1.3.2.1.2.4.4 The Auxiliary relay coil de-energizes DATE TITLE SOFTWARE REQUIREMENTS SYNCOR Radiation Management 10/23/02 SPECIFICATION. 94095603 REV ECO NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION .Q_, 7 of 10 94095603SRS PLN

I . 1:

3.2.1.3.2.1.2.5 When HIGH alarm is acknowledged:

3.2.1.3.2.1.2.5.1 HIGH alarm indicator will be steady on 3.2.1.3.2.1.2.5.2 The Auxiliary relay will change state when the radiation value drops below the HIGH alarm set point.

3.2.1.3.2.1.2.5.3 HIGH alarm relay will change state when the radiation value drops below the HIGH alarm set point.

3.2.1.3.2.1.2.6 The HIGH alarm is normally inhibited in Check Source Mode 3.2.1.3.2.1.3 Range Alarm condition 3.2.1.3.2.1.3.1 When measured radiation field is below under range set point:

3.2.1.3.2.1.3.1.1 Front panel display will indicate 0.00 mR/h 3.2.1.3.2.1.3.1.2 Bargraph will indicate the actual radiation value 3.2.1.3.2.1.3.1.3 RANGE alarm indicator will illuminate in red.

3.2.1.3.2.1.3.1.4 The analog outputs are set to 0.00 3.2.1.3.2.1.3.2 When measured radiation field increases into the range of the detector.

3.2.1.3.2.1.3.2.1 RANGE alarm indicator will extinguish 3.2.1.3.2.1.3.2.2 Normal operation will begin 3.2.1.3.2.1.3.3 When measured radiation field is above over range set point:

3.2.1.3.2.1.3.3.1 WARN alarm is true 3.2.1.3.2.1.3.3.2 HIGH alarm is true 3.2.1.3.2.1.3.3.3 Red RANGE indicator is illuminated 3.2.1.3.2.1.3.3.4 Bargraph illuminates in red 3.2.1.3.2.1.3.3.5 Analog output reads full scale 3.2.1.3.2.1.3.3.6 Front panel display reads EEEEE 3.2.1.3.2.1.3.3.7 Over range alarm is reset by pressing acknowledge pushbutton 3.2.1.3.2.1.3.3.8 Over range alarm does not reset automatically 3.2.1.3.2.1.3.3.9 When detector output is above the electronic anti jam circuit threshold the anti-jam circuit will be activated 3.2.1.4 Check Source Mode 3.2.1.4.1 Check source pushbuttons are provided to verify detector operation 3.2.1.4.1.1 When CHECK SOURCE pushbutton is held down:

3.2.1.4.1.1.1 Check source relay is energized 3.2.1.4.1.1.2 Check source indicator will illuminate (green) 3.2.1.4.1.1.3 Radiation value will be displayed on the front panel 3.2.1.4.1.1.4 Front panel High and Warn alarms status indicators are disabled 3.2.1.4.1.1.5 Analog outputs are set to zero 3.2.1.4.1.2 When CHECK SOURCE pushbutton is released:

3.2.1.4.1.2.1 Check source indicator will be extinguished 3.2.1.4.1.2.2 Normal UDR operation will resume 3.2.1.5 Calibration Mode 3.2.1.5.1 Current calibration time is displayed in seconds 3.2.1.5.2 First digit flashing to indicate the edit mode 3.2.1.5.3 Bargraph will turn off 3.2.1.5.4 High condition will clear 3.2.1.5.5 Warn condition will clear 3.2.1.5.6 Radiation units backlight will turn off 3.2.1.5.7 Calibration set point may be edited T DATE TITLE SOFTWARE REQUIREMENTS SYNCOR Radiation Management I10/23/02 SPECIFICATION, 94095603 RELEASED FOR DOG CTRL SHEET NO. SIZE REV ECO NO.

2 3076 PRODUCTION__[ 8 of 10 94095603SRS PLN

3.2.1.5.8 The ENTER pushbutton will start the Calibrate timer 3.2.1.5.9 Whenever calibration is restarted the system will display calibration time for editing.

3.2.1.5.10 When the calibrate time expires, the backlight will be steady on 3.2.1.5.11 Once calibration mode is exited 3.2.1.5.11.1 UDR will reset 3.2.1.5.11.2 UDR will continue normal operation 3.2.1.5.12 Calibration mode can be entered with UDR in CHECK SOURCE mode 3.2.1.6 Data Entry Mode 3.2.1.6.1 Selected by pressing ENTER pushbutton while the rotary FUNCTION switch is in a valid set point position.

3.2.1.6.1.1 Selected set point is displayed in exponential format (e.g. 1.00E2) 3.2.1.6.1.2 Left most digit is flashing 3.2.1.6.1.3 Set point values are entered in exponential format (e.g. X..XXEN), where X is the mantissa and N is the exponent 3.2.1.6.1.4 X value may be any integer value between 0 and 9 3.2.1.6.1.5 Exponent may be positive or negative 3.2.1.6.1.6 Exponent may be any integer between 0 and 9 3.2.1.6.2 Function switch not on a valid set point has no effect.

3.2.1.6.3 Bargraph remains active 3.2.1.6.4 Analog outputs remain active 3.3 Performance requirements 3.3.1 Contact output logic shall be fail safe 3.3.2 Response time of the system for a change in radiation value is 60 seconds.

3.3.3 Display is updated once per second 3.3.4 Alarm is initiated within one second after the current one minute average exceeds the alarm setpoint.

3.3.5 After approximately 60 seconds the displayed value will indicate ambient radiation 3.3.6 Calibration mode will be reset to 60 seconds whenever unit is turned off 3.3.7 Calibration mode reset to 60 seconds when functional switch is moved from position 8 3.3.8 When checksource button is held down the check source relay will change state causing the mechanism in the detector to expose the check source 3.3.9 When checksource button is released, the check source relay will return to its normal state and the source capsule in the detector will be returned to its shielded position 3.4 Design constraints 3.4.1 Radiation rate range is 1.0E-2 to 1.0E+5 mR/hr 3.4.2 Operating temperature is 32 degrees F to 122 degrees F (0 degrees C to +50 degrees C) 3.4.3 Relative humidity is 0 to 99% non-condensing 3.4.4 Heat loading is approximately 96 BTU/hr 3.4.5 120Vac power requirement is approximately 28 watts 3.4.6 MC6802 Microprocessor 3.4.7 1MHz processor operation 3.4.8 8 bit word size 3.4.9 Interrupt capability 3.4.10 Software compatible with MC6800 3.4.11 32Kx8 UV erasable EPROM memory 3.4.12 8Kx8 RAM (E )

3.4.13 64bytes, Electrically erasable memory DATE TITLE SOFTWARE REQUIREMENTS SYNCOR Radiation Management 10/23/02 SPECIFICATION, 94095603 REV ECO NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION QYfi 9 of 10 94095603SRS PLN

3.5 Software system attributes 3.5.1 Reliability The firmware will be designed/tested/controlled/maintained in accordance with the Verification and Validation Plan for PROM P/N 94095603.

3.5.2 Availability Initialization will take place every time the system is pbwered up or reset.

3.5.3 Security The operating program for the UDR resides on a PROM. It cannot be accidentally modified by the user.

3.5.4 Maintainability The firmware will be written in assembly language. It will be modular by design. This is a simple system that does a limited set of functions.

3.6 Other requirements 3.6.1 There'are to be nine user specified set points, switch selectable 3.6.1.1 HIGH alarm 3.6.1.2 WARN alarm 3.6.1.3 Resolving time detector dead time 3.6.1.4 Analog full scale limit 3.6.1.5 Over range limit 3.6.1.6 Conversion constant 3.6.1.7 Analog low scale 3.6.1.8 Calibrate mode 3.6.1.9 Under range value 3.6.2 UDR contains a series of eleven hardware jumpers for configuration purposes 3.6.2.1 JP1, Microprocessor reset 3.6.2.2 JP2, PROM type 3.6.2.3 JP3 JP3-2, statistical Accuracy 3.6.2.4 JP3-3, Alarm acknowledge logic 3.6.2.5 JP3-4, Fail alarm 3.6.2.6 JP3-5, Check Source alarm 3.6.2.7 JP4 through JP7, Hardware options 3.6.3 Error codes are to be displayed 3.6.3.1 E0001 - Display value is negative 3.6.3.2 E0007 - Specific function is not implemented 3.6.4 Error codes are cleared automatically when initiating event is corrected.

DATE TITLE SOFTWARE REQUIREMENTS SYNCOR Radiation Management 10/23/02 SPFICATIONQ94095603 I SPECIFICATION, 94095603 REV ECO NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,71" 10 of 10 94095603SRS PLN

SOFTWARE DESIGN DESCRIPTION FOR PROM P/N 94095603 G-M AREA MONITOR REV. LEVEL ECN # DESCRIPTIONIPAGES AFFECTED 2 3076 Add 24 bar graph segments and correlation to 4.2.13; Add Overrange frequencies 2__3076_ and text to end of 4.2.31; Add SPDF30 used in 94095603 PROM, p. 106 1 3074 Initial Release ENGINEERING - DATE /po- 2,, MANUFACTURING , DATE Vo-Z9-/JZ QUALITY ASSURANCE )V Al DATE /o..

DATE TOLE SOFTWARE DESIGN DESCRIPTION SYNCOR-RADIATION MANAGEMENT I 94095603 REV ECN NO. RELEASED FOR DOG CTRL SHEET NO. SIZE 2 3076 PRODUCTION 1lof 189PL 2 34RUI3SDD ¶N

Table of Contents Section Description Page

1. Introduction .................................................................. 5 1.1. Purpose ................................................................. 5 1.2. Scope ................................................................... .... 5 1.3. Definitions, Acronyms and Abbreviations ........................ 5

2. References ...................................................................... 9

3. Decomposition Description ........................................... 10 3.1. Module Decomposition .............................................. 10 3.2. Concurrent Process Description .................................... 15 3.3. Data Decompostion ................................................... 15

4. Dependency Description .. ............................................ 17 4.1. Intermodule Dependencies .......................................... 17 4.2. Interprocess Dependencies .......................................... 41 4.3. Data Dependencies .................................................... 49

5. Interface Description ...................................................... 50 5.1. Module Interface .......................................................... 50 5.1.1. Include files .......................................................... 50 5.1.2. Source Modules .................................................... 51 5.1.2.1. Alrsvc.s ............................................................ 51 5.1.2.2. Anaout.s ............................................................ 51 5.1.2.3. Calc.s .............................................................. 51 5.1.2.4. Calsvc.s ........................................................... 51 5.1.2.5. Chksvc.s ......................................................... 51 5.1.2.6. Clock.s ................................................................. 51 5.1.2.7. Cntsvc.s ........................................................... 51 5.1.2.8. Com232.s .............................................................. 51 5.1.2.9. Com485.s .............................................................. 51 5.1.2.10. Dbasub.s ........................................................... 51 5.1.2.11. Dspsvc.s ........................................................... 51 5.1.2.12. Eesvc.s ............................................................ 51 5.1.2.13. Setedt.s ........................................................... 51 5.1.2.14. Host485.s ......................................................... 51 5.1.2.15. Idspsvc.s ........................................................... 52 5.1.2.16. Inthnd.s ........................................................... 52 5.1.3. Support Modules .................................................... 52 5.1.3.1 Common.s ............................................................ 52 5.1.3.2 Comsum.s ............................................................ 52 5.1.3.3 Conf.s ............................................................... 52 5.1.3.4 Error.s ............................................................... 52 5.1.3.5 Libra.s ............................................................... 52 5.1.3.6 Nmi8.s ............................................................... 52 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o 32 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 1- 3076 PRODUCTION ,***l 2 of 189 9409O203SDD PLN

5.1.3.7 Setedt.s ................................................................ 52 5.1.3.8 Swisvc.s .................................. 52 5.2. Process Interface .............................................................. 52 5.3. Process Description ........................................................ 53

6. Detailed Design ................................................................. 53 6.1. Module Detailed Design .................................................... 53 6.1.1. Include Modules ........................................................ 53 6.1.1.1. Acia.s ................................................................... 53 6.1.1.2. Alrsvci.s ............................................................... 53 6.1.1.3. Calsvcis ................................................................. 53 6.1.1.4. Com2232i.s ........................................................... 53 6.1.1.5. Com485i.s ............................................................. 53 6.1.1.6. Combuf.s ............................................................. 53 6.1.1.7. Commoni.s ........................................................... 53 6.1.1.8. Comsubi.s ............................................................ 53 6.1.1.9. Confi.s ............................................. ................. 53 6.1.1.10. Dspsvci.s ............................................................... 54 6.1.1.11. Errori.s ................................................................. 54 6.1.1.12. Inc equ.s ................................................................ 54 6.1.1.13. Inthndi.s ................................................................. 54 6.1.1.14. Macrolib.s ............................................................. 54 6.1.1.15. Nmi8i.s .................................................................. 55 6.1.1.16. Pcb.s ..................................................................... 55 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 101312 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 94095603SDD 1 PIN 2 3076 PRODUCTION *?.*f 3 of 189

6.2 Source files ......................................................... 55...

6.2.1 Alrsvc.s ............................................................... 55.

6.2.2 Anaouts ............................................................. 61 6.2.3 Calc.s ............................................................... 65 6.2.4 Calsvc.s ........................................................... 67 6.2.5 Chksvc.s ........................................................... 69 6.2.6 Clock.s ............................................................. 70 6.2.7 Cntsvc.s ............................................................. 75 6.2.8 Com232.s ............................................................ 76 6.2.9 Com485.s ........................................................... .82 6.2.10 Common.s ............................................................ 89 6.2.11 Comsub.s ............................................................ 90 6.2.12 Conf.s ................................................................... 105 6.2.13 Dbasub.s ................................................................ 108 6.2.14 Dspsvc.s ................................................................. 109 6.2.15 Eesvc.s .................................................................... 116 6.2.16 Entsvc.s .................................................................... 120 6.2.17 Error.s ...................................................................... 124 6.2.18 Host485.s ................................................................... 125 6.2.19 Idspsvc.s ................................................................... 130 6.2.20 Inthnd.s ...................................................................... 132 6.2.21 Libra.s ...................................................................... 133 6.2.22 Nmi8.s ....................................................................... 143 6.2.23 Setedt.s ..................................................................... 144 6.2.24 Swisvc.s ..................................................................... 149 Appendix A Firmware Flowchart ................................................... 182 Appendix B Microprocessor Circuit Diagram ................................. 185 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT /o 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 9SIZE 2 3076 PRODUCTION 9'%'W 4 of 189 PLN

1. Introduction This software design description document provides information on the architecture and coding of the UDR firmware PROM P/N 94095603, used in the Model 956A G-M AREA MONITOR. This document has been prepared in accordance with the requirements of ANSI/IEEE Std. 1016-1987.

1.1. Purpose This document defines how the requirements specified in the SRS could be achieved using the software architecture defined in this document in accordance with Reference 2.2 and 2.6.

1.2. Scope The system will be divided into modules, relationship between them and functionalities will be defined in accordance with Reference 2.2 and 2.6.

1.3. Definitions, acronyms, and abbreviations 1.3.1. Definitions 1.3.1.1. Architecture -The organizational structure of the system.

1.3.1.2. Commercial Grade Item Dedication -An acceptance process undertaken to provide reasonable assurance that a commercial grade item to be used as basic component will perform its intended safety functions and, in this respect, is deemed equivalent to an item designed and manufactured under a 1 OCFR Part 50, Appendix B, quality assurance program.

1.3.1.3. Component - A distinct part of a subsystem. A component may be decomposed into other components and computer software units.

1.3.1.4. Computer Program - A combination of computer instructions and data definitions that enable computer hardware to perform computational or control functions.

1.3.1.5. Critical Characteristics - Those important design, material, and performance characteristics of a commercial grade item that, once verified, will provide reasonable assurance that the item will perform its intended safety function.

1.3.1.6. Data - A representation of facts, concepts, or instructions in a manner suitable for communication, interpretation, or processing by humans or by automatic means.

1.3.1.7. Data Flow-The sequence in which data transfer, use, and transformation are performed during the execution of a computer program.

1.3.1.8. Deadtime - tau value, function of the detector and supplied with detector calibration sheet.

1.3.1.9. Dedicator- Refers to the dedicating entity: the organization that performs the dedication process.

1.3.1.10. Dependability-A broad concept incorporating various characteristics of digital equipment, including reliability, safety, availability, maintainability, and others.

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1.3.1.11. Design Description - A document that describes the design of a system or comp6nent.

1.3.1.12. Design Entity-An element (component) of a design that is structurally and functionally distinct from other elements and that is separately named and referenced.

1.3.1.13. Design Method- A definition of a set of essential entities.

1.3.1.14. Design Methodology-A guideline identifying how to design software.

1.3.1.15. Design View- A subset of design entity attribute information that is specifically suited to the needs of a software project.

1.3.1.16. Digital Equipment- Equipment containing one or more computers.

1.3.1.17. Entity Attribute - A named characteristic or property of a design entity that provides a systematic procedure for the statement of fact about the entity.

1.3.1.18. Firmware - Software that resides in read-only memory.

1.3.1.19. Fail Safe -A condition for a relay where in normal operation the relay is energized.

1.3.1.20. G-M - Geiger-Mueller tube gamma radiation detector 1.3.1.21. Goto - Is to be coded as a jump or branch depending on conditions 1.3.1.22. Hardware - The physical equipment used to process, store, or transmit computer programs.

1.3.1.23. Include Module - A program file containing variable declarations and definitions that is included in one or more source files, to guarantee that all the source files will be supplied with the same definitions and declarations.

1.3.1.24. Microprocessor- See "Computer" 1.3.1.25. Model - A representation of one or more aspects of a system.

1.3.1.26. Module - A program unit that is discrete and identifiable with respect to assembling/compiling with other units and loading.

1.3.1.27. Notation - A set of symbols used to represent design entities and entity attributes.

1.3.1.28. Nuclear grade equipment - Basic components designed and manufactured under a quality assurance program complying with 10CFR50 Appendix B.

1.3.1.29. Regression Testing - Selective retesting of a system or component to verify that modifications have not caused unintended effects and that the system or component still complies with its specified requirements.

1.3.1.30. Requirements - The statement of needs by a user that triggers the development of a program, system, or project.

1.3.1.31. Robustness - The ability of the digital equipment to function correctly in the presence of invalid inputs or stressful environmental conditions.

1.3.1.32. Routine - A defined objective or characteristic action of a system or component software module that performs a specific action, is invoked by the appearance of its name in an expression, may receive input values and return a value.

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. S93E PLN 2 3076 PRODUCTION &?'/W 6 of 189

1.3.1.33. Safety Systems - Those systems that ai'e relied upon to remain functional during and following design basis events to ensure (i) the integrity of the reactor coolant pressure boundary, (ii) the capability to shut down the reactor and maintain it in a safe shutdown condition, or (iii) the capability to prevent or mitigate the consequences of accidents that could result in potential offsite exposures comparable to the 10CFR Part 100 guidelines.

1.3.1.34. Software - Computer programs, procedures, and data pertaining to the operation of a computer system. This includes software that is implement ed in firmware.

1.3.1.35. Software Design Description -A representation of a software system created to facilitate analysis, planning, implementation, and decision making.

1.3.1.36. Software Design Document- The output of design process in a presentable format.

1.3.1.37. Software Design Process - Organized tasks and activities of design, having appropriate specifications.

1.3.1.38. Software Design Process Specification - Know-how, technology of design, that specify operationally how to use methodology of design (standardized itself) together with standards for evaluating design, tools to support design automation, and documentation required to represent design information.

1.3.1.39. Software Tool - A computer program used in the development, testing, analysis, or maintenance of a program or its documentation.

1.3.1.40. Source Module - A program file that contains the code that is used to generate the program.

1.3.1.41. System Integration - The process of combining software components, hardware components, or both into an overall system.

1.3.1.42. System Testing - Testing conducted on a complete, integrated system to S----evaluate the system's compliance with its specified requirements.

1.3.1.43. Thermister- Solid state sensor which changes voltage output with temperature; very reliable, more expensive than thermostats, rapidly becoming the industry standard 1.3.1.44. Traceability- (1) The degree to which a relationship can be established between two or more products of the development process, especially products having a predecessor-successor or master-subordinate relationship to one another. (2) The degree to which each element in a software development product establishes its reason for existing.

1.3.1.45. Traceability Matrix - A matrix that records the relationship between two or more products of the development process.

1.3.1.46. Unit- (1) A separately testable element specified in the design of a computer software component. (2) A logically separable part of a computer program. (3) A software component that is not subdivided into other components. Note: The terms "module", "component", and "unit" are used interchangeably.

1.3.1.47. -Unit-Testing - Testing of-individual hardware of-software units or groups of related units.

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10/3/02 =9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SE 2 3076 PRODUCTION 0?1/( 7 of 189 PLN

1.3.1.48. Varistor ;variable resistor: a two-element semiconductor with nonlinear resistance in which the resistance drops as the applied voltage increases.

Varistors are often used as a safety device to short circuit transient high voltages in electronic circuits 1.3.1.49. Vendor- The organization that holds information on one or more of the following: the design, design development process, testing, operating history, error reporting, and original equipment manufacturer.

1.3.1.50. Verification and Validation (V&V) - The process of determining whether the requirements for a system or component are complete and correct, the products of each development phase fulfill the requirements or conditions imposed by the previous phase, and the final system or component complies with specified requirements. The activities involved in verification and validation are equivalent, for digital systems, of activities that have traditionally been performed for design verification and acceptance testing of other types of equipment used in nuclear safety related applications.

1.3.1.51. VICO loop - proprietary communication protocol used by Syncor to communicate with a dumb terminal, or other another digital system.

1.3.1.52. Watchdog Timer - A timer that must be reset on a repetitive basis, or it will time out and take a prescribed action.

1.3.2. Acronyms 1.3.2.1. AC - Alternating Current 1.3.2.2. ACIA - Asynchronous Communications Interface Adapter 1.3.2.3. ANSI - American National Standard 1.3.2.4. ASCII - American Standard Code for Information Interchange 1.3.2.5. BCD - Binary-Coded Decimal 1.3.2.6. CCR - Condition Code Register 1.3.2.7. CPM - counts per minute 1.3.2.8. CS - Clear to Send 1.3.2.9. CSA - Canadian Standards Association 1.3.2.10. DIA - Digital to Analog 1.3.2.11. DC- Direct Current 1.3.2.12. EEPROM - Electrically Erasable Programmable Read-Only Memory 1.3.2.13. EMI - ElectroMagnetic Interference 1.3.2.14. EPRI - Electric Power Research Institute 1.3.2.15. ETX- End of Transmission Text 1.3.2.16. FCC - Federal Communications Commission 1.3.2.17. IEEE- Institute of Electrical and Electronics Engineers, Inc 1.3.2.18. IRQ- Interrupt Request 1.3.2.19. LPC - Linear Predictive Coding 1.3.2.20. LSB - Least Significant Byte 1.3.2.21. MID- Middle Byte 1.3.2.22. MPU - MicroProcessor Unit 1.3.2.23. MSB - Most Significant Byte 1.3.2.24. PCB - Printed Circuit Board DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o 3/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SE 2 3076 PRODUCTION 8 of 189 PLN

1.3.2.25. PROM - Programmable Read Only Memory 1.3.2.26. PTC - Positive Temperature Coefficient 1.3.2.27. QAM - Quality Assurance Manual 1.3.2.28. RAM - Random Access Memory 1.3.2.29. ROM - Read-Only Memory 1.3.2.30. SDD - Software Design Descriptions 1.3.2.31. SRS - Software Requirement Specification 1.3.2.32. STX- Start of Text 1.3.2.33. TTL- Transistor- Transistor Logic 1.3.2.34. UDR - Universal Digital Ratemeter 1.3.2.35. SWP - Software V & V Plan 1.3.2.36. UL - Underwriters Laboratories, Inc 1.3.2.37. V&V - Verification and Validation 1.3.2.38. Vac - Voltage Alternating Current 1.3.2.39. VDE - Verband Deutscher Elektrotechniker 1.3.2.40. WR - Write 1.3.3. Abbreviations 1.3.3.1. HEX- hexadecimal number 1.3.3.2. Hz- Hertz 1.3.3.3. kR/h - kiloRoentgens per hour 1.3.3.4. mR/h - milliRoentgens per hour 1.3.3.5. MONSTAT - monitor status 1.3.3.6. msec - milliseconds 1.3.3.7. ns - nanosecond 1.3.3.8. opcode - operation code 1.3.3.9. OPTBRD - option board 1.3.3.10. P/N - part number 1.3.3.11. -R/h - Roentgens per hour 1.3.3.12. RIW- Read Write 1.3.3.13. uC/cc -micro-Curies per cubic centimeter 1.3.3.14. UV - Ultra Violet

2. References 2.1 IEEE Std 610.12-1990, Glossary of Software Engineering Terminology 2.2 ANSI/IEEE Std 1016-1987, Recommended Practice for Software Design Descriptions 2.3 IEEE Std 1016.1-1993, Guide to Software Design Descriptions 2.4 IEEE Std 1074-1991, Standard for Developing Software Life Cycle Processes 2.5 IEEE Std 1219-1992, Standard for Software Maintenance 2.6 EPRI TR-103291-CD, Handbook for Verification and Validation of Digital Systems 2.7 EPRI TR-106439, Guideline on Evaluation and Acceptance of Commercial Grade Digital -Equipment for NuclearSafety-Applications-_

2.8 Software Requirement Specification for PROM P/N 94095603, PIN 94085603SRS 2.9 Software Verification and Validation Plan for Prom P/N 94095603, PIN 94095603WP DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNcoR RADIATION MANAGEMENT 1 31o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,9,,:f 9 of 189 PLN

2.10 SYNCOR QAM PIN QSP-100 Version 4.

3. Decomposition Description The section describes the major functions of each module that is used in the 956A UDR firmware.

3.1. Module Decomposition 3.1.1. Continuously monitor radiation 3.1.1.1. Main module 3.1.1.1.1. Handles initialization on power up and when reset line is signaled 3.1.1.1.1.1. HIGH alarm light off 3.1.1.1.1.2. WARN alarm light off 3.1.1.1.1.3. Fail light off 3.1.1.1.1.4. Check Source light off 3.1.1.1.1.5. Bar graph green 3.1.1.1.2. Clear all RAM memory 3.1.1.1.3. Copy floating numbers from ROM to RAM 3.1.1.1.4. Energize the high and warn alarm relays if fail safe 3.1.1.1.5. Main loop Check communication option 3.1.1.1.5.2. Service interrupts 3.1.1.1.5.3. Service data entry buttons 3.1 .1.1.5.4. Check for calibration mode 3.1.1.1.5.5. Every second 3.1.1.1.5.5.1. Clear number of counts in accumulator 3.1.1.1.5.5.3. Update seconds 3.1.1.1.5.5.2.

3.1.1.1.5.5.4. Get calibration status Display values in selected units 3.1.1.1.5.5.5. Service alarms 3.1.1.1.5.5.6. Get deadtime correction 3.1.1.1.5.5.7. Estimate true CPM rate 3.1.1.1.5.5.8. Output to chart recorder 3.1.1.1.5.5.9. Process check source button 3.1.1.1.5.5.10. Reset watchdog timer 3.1.1.1.5.5.11. Clear switch latch 3.1.1.1.5.5.12. Wait for interrupt 3.1.1.1.5.6. Every minute 3.1.1.1.5.6.1. Update minutes 3.1.1.1.5.7. Every hour 3.1.1.1.5.7.1. Update hours 3.1.1.1.5.8. Every day 3.1.1.1.5.8.1. Update days DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT IQ'23/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 9,*?Wf 1 10 of 189 PLN

3.1.2. Inform userwhen predetermined limit has been exceeded or not met 3.1.2.1. If no coint 3.1.2.1.1. de-energize fail relay 3.1.2.1.2. illuminate fail light 3.1.2.2. If loss of power 3.1.2.2.1. de-energize fail, WARN and HIGH relays 3.1.2.3. If hardware failure (i.e. watch dog timer time out) 3.1.2.3.1. de-energize fail relay 3.1.2.3.2. illuminate fail light 3.1.2.4. If detector anti-Jam 3.1.2.4.1. de-energize fail relay 3.1.2.4.2. illuminate fail light 3.1.2.5. WARN condition 3.1.2.5.1. If in Check Source Mode, block WARN alarm 3.1.2.5.2. If display dose rate is greater than or equal to WARN alarm set point 3.1.2.5.2.1. Flash amber WARN alarm indicator 3.1.2.5.2.2. Set bar graph color to amber 3.1.2.5.2.3. De-energize WARN alarm relay coil 3.1.2.5.3. WARN alarm is acknowledged 3.1.2.5.3.1. Set WARN alarm indicator to steady on 3.1.2.5.3.2. When radiation value drops below WARN set point 3.1.2.5.3.2.1. Change state of WARN alarm relay 3.1.2.5.3.2.2. Turn off WARN alarm indicator light 3.1.2.5.3.2.3. Set bar graph to normal color 3.1.2.6. HIGH alarm condition 3.1.2.6.1. If in Check Source Mode, block HIGH alarm 3.1.2.6.2. If display dose rate is greater than or equal to HIGH alarm set point 3.1.2.6.2.1. Flash red HIGH alarm indicator 3.1-2.6.2.2 - Set bar graph to red 3.1.2.6.2.3. HIGH alarm relay coil is de-energized 3.1.2.6.2.4. Set auxiliary output high (option) 3.1.2.6.3. HIGH alarm is acknowledged 3.1 .2.6.3.1. Set HIGH Wlarm indicator to steady on 3.1.2.6.3.2. Set auxiliary output low (option) 3.1.2.6.4. When radiation value drops below HIGH set point 3.1.2.6.4.1. Change state of HIGH alarm relay 3.1.2.6.4.2. Change bar graph color to amber 3.1.2.6.4.3. Turn off HIGH alarm light DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 103/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION .041(U 11 of 189 PLN

3.1.2.7. Range alarm condition 3.1.2.7.1. Mea~ured radiation is below Under Range set point then 3.1.2.7.1.1. Display value of 0.00 mR/h 3.1.2.7.1.2. Display actual value on bar graph with fixed mR/h scale 3.1.2.7.1.3. Illuminate RANGE alarm indicator in red 3.1.2.7.1.3.1. When radiation value increases into the range of the detector, 3.1.2.7.1.3.2. Turn off RANGE alarm indicator 3.1.2.7.2. Measured radiation is above the Over Range set point, 3.1.2.7.2.1. Set WARN alarm status to true 3.1.2.7.2.2. Set HIGH alarm status to true 3.1.2.7.2.3. Illuminate red RANGE alarm indicator 3.1.2.7.2.4. Set bar graph color to red 3.1.2.7.2.5. Set analog output to full scale 3.1.2.7.2.6. Display 'EEEEE' for radiation value on front panel 3.1.2.7.2.7. When acknowledged and the reading is below the set point 3.1.2.7.2.7.1. Reset Alarm Over Range 3.1.2.7.2.8. When detector output is above the electronic anti-jam circuit threshold, the hardware Anti-Jam circuit is activated 3.1.3. Check Source Mode 3.1.3.1. While button is depressed 3.1.3.1.1. Energize check source relay to expose the source capsule 3.1.3.1.2. Illuminate check source indicator 3.1.3.1.3. Display radiation value on front panel 3.1.3.1.4. Disable HIGH and WARN status indicators 3.1.3.1.5. Set analog outputs to zero 3.1.3.2. When check source button is released 3.1.3.2.1. Disable check source 3.1.3.2.2. Clear averaging buffer 3.1.3.2.3. Turn off check source indicator DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT lO'231o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO SIZE 2 3076 PRODUCTION , 1 12 of 189 PILN

3.1.4. Calibration mode 3.1.4.1. Set the select switch to position 8, and press the ENTER button to start the calibration mode 3.1.4.2. Display current calibration time in seconds on front panel 3.1.4.3. Flash first digit to indicate edit mode 3.1.4.3.1 Permit editing of the calibrate time 3.1.4.4. Turn off bar graph 3.1.4.5. The Analog output is set to the last displayed value 3.1.4.6. Clear HIGH alarm condition 3.1.4.7. Clear WARN alarm condition 3.1.4.8. Turn off radiation backlight 3.1.4.9. Start the calibrate timer by pressing the ENTER button 3.1.4.9.1. Set display to zero 3.1.4.9.2. Flash the backlight units 3.1.4.9.3. Update the counts each second 3.1.4.10. Stop calibration in process 3.1.4.10.1. When calibrate time has expired 3.1.4.10.2. When ENTER button is pressed 3.1.4.10.3. When rotary switch is moved out of position 8 3.1.4.10.4. Display the total counts received 3.1.4.10.5. Set backlights to steady on 3.1.4.11. If ENTER key is pressed when calibration is done 3.1.4.11.1. Display calibration time in seconds on front panel 3.1.4.11.2. Enable editing of calibration time 3.1.4.11.3. Wait for ENTER button to be pressed to start timer 3.1.4.12. Exit calibration mode when rotary switch is moved out of position 8 3.1.4.13. Reset UDR to normal operation when calibration mode is exited 3.1.4.14. Start Calibrate mode in check source 3.1.4.14.1 When the rotary switch is in position 8 3.1.4.14.2 When the check source button is pressed and held down and 3.1.4.14.3 When the ENTER button is pressed 3.1.4.14.4 The check source indicator will illuminate 3.1.4.14.5 When the check source button is then released 3.1.4.14.1 The check source will be locked on 3.1.4.14.2 The check source indicator will remain lit 3.1.4.14.6 Press the ENTER button to start the calibrate timer 3.1.4.14.7 Exit calibration mode when rotary switch is moved out of position 8 3.1.4.14.8 Clear check source condition 3.1.5. Data Entry Mode 3.1.5.1. If select switch is set to valid set point number and ENTER is pressed 3.1.5.1.1. Display selected set point in exponential format 3.1.5.1.2. Flash left most digit for editing 3.1.5.1.3. Read set point values in exponential format (X.XXEN) 3.1.5.1.3.1. X is the mantissa 3.1.5.1.3.2. X can be any integer value between 0 and 9 3.1.5.1.3.3. N is the exponent 3.1.5.1.3.4. Exponent can be positive or negative DATE TITLE SOFTWARE DESIGN DESCRIPTION,

-SYNORRRADIATION MANAGEMENT o 3O2 -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SE 2 3076 PRODUCTION £-'1- 1 13 of 189 PLN

3.1.5.1.3.5. Exponent is any integer between 0 and 9 3.1.5.1.4. Switch position on invalid set point r~port error E0007 3.1.5.1.5. Display radiation values on bar graph in fixed mR/h scale 3.1.5.1.6. Set analog outputs to monitored radiation values 3.1.5.1.7. Push ENTER button to enter the value into memory 3.1.6. Set Points 3.1.6.1. Set Point 0 - HIGH alarm 3.1.6.2. Set Point 1 - WARN alarm 3.1.6.3. Set Point 2 - Resolving Time (Dead Time) 3.1.6.4. Set Point 3 - Analog Full Scale 3.1.6.5. Set Point 4 - Overrange 3.1.6.6. Set Point 5 - Conversion Constant 3.1.6.7. Set Point 6 - Not Used 3.1.6.8. Set Point 7 - Analog Low Scale 3.1.6.9. Set Point 8 - Calibrate Mode 3.1.6.10. Set Point 9- Underrange 3.1.6.11. Set Points A through F - Not Used 3.1.6.12. ErrorCode 3.1.6.12.1. E0001 - Negative display data 3.1.6.12.2. E0002 - Invalid set point value 3.1.6.12.3. E0007 - Invalid function 3.1.6.12.4. E0008 - Invalid analog scale value 3.1.6.12.5. EEEEE - Overrange condition 3.1.6.12.6. Error codes are cleared automatically when initiating event is corrected.

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o 31o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION a,'?f'Z 14 of 189 PLN

3.2. Concurrent Process Description The UDR software/firmware is a simple system. On power up, initialization takes place.

Then the system goes into a sleep state until the timing interrupt occurs. Then all of its selected functions are performed. The Main Loop timing cycle is I second.

3.3. Data Decomposition Operating parameters (i.e. User set points) are stored in EEPROM. Data is passed between functions via accumulator A, accumulator B, index register X, calling parameter or public variable.

3.3.1. Conversion Constant Set Point The conversion constant converts the detector pulse rate into an mR/h value, using the following equation:

D = (CPM x K) - BKG Where: D = the calculated value in mR/h (used for alarm set point limit checks)

CPM = the current, true, count rate in CPM (the sum of the 60 most recent I seconds values, corrected for Tau).

K = the conversion constant in mR/h/CPM BKG = 0 (not used)

The value of K is supplied on the detector calibration data sheet.

3.3.2. Resolving Time (Dead Time)

This constant is a correction for the resolving time of the detector. As the radiation field that the detector is viewing increases, the detector cannot count every pulse, because some are in coincidence or are so close together that two pulses may look like one. To correct for this nonlinearity, the resolving time is corrected by the following equation:

CPM = Ro/(1-(Ro x Dead Time))

Where: CPM = the true count rate Ro = the observed count rate ( the sum of the 60 most recent 1 second values)

Dead Time = the resolving time in minutes/count The value of Dead Time is supplied with the detector and is found on the detector calibration data sheet. This value is identified as TAU on the data sheet.

3.3.3 Analog Output The analog output is a logarithmic function of the displayed value. An 8 bit DAC is used to convert the displayed value to an 4-20 mA and a 0-1 OVdc analog output.

The analog output full scale and low scale set points are used to scale the output to the range of the detector.-Thejollowing equation is used to calculate the analog output voltage or current:

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o 3Io2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 15of 189 PLN

P = log ( R / LSV) / [ log (FSV) - log (LSV)]

And V = P (Vmax - Vmin) + Vmin or I = P (Imax - Imn) + Imin Where:

Percent of scale, expressed as a decimal number R= Current reading LSV= Low scale value FSV= Full scale value V= Voltage output I=

Current output Vmax= Maximum voltage available (usually 1OVdc)

Vmin= Minimum voltage available (usually 0 Vdc)

Imax= Maximum current available (usually 20 mA)

Imln=

Minimum current available (usually 4 mA)

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 123/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 9411W I 16 of 189 I PLN

4. Dependency Description This is a simple system. It performs a finite set of functions every second. This section shows the dependency between modules.

4.1. Intermodule Dependencies All modules above the reference module are either modules that are included in the reference module or make calls to the routines within the reference module. All modules below the reference module either have routines that are called by the reference module or contain data that is used or modified by the reference module.

4.1.1. Alrsvc.s alrsvcis clock-s inc-equ s macrolib.s coImm0n S conEs libra.s swisvc.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1c-o2 9405603 REV ECN NO.I RELEASED FOR DOC CTRL SHEET NO.94IE 2 3076 PRODUCTION ,94%/,kf 17 of 189 PLN

4.1.2. Anaout.s I I I n .0*-s con~s htbra.s swisvc.s co0 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,**./' 18 of 189PL 94095603SDD 1

4.1.3. Calc.s clocks mnc_equ.s niacrolib. s

-7 common. s confs hIbra.s swisvc.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT Io'3/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION i*,4f 19 of 189 PLN

4.1.4. Calsvc.s cornmorLs confs libra s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 103/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION I .1f( 20 of 189 PLN

4.1.5. Chksvc.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 102o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 9SIZE 2 3076 PRODUCTION 6.-., 21 of 189 PLN

4.1.6. Clock.s n Is r*8.s airsvc.s I DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o13102 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION &Wif 22 of 189 PLN

4.1.7. Cntsvc.s clock~s inc-equ s macrohlb. s commnoris hbra.s swisvc.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SZE 2 3076 PRODUCTION 94Y 23 of 189 PLN

4.1.8. Com232.s I I I I I commorls coms'ub s corfs hb"oa s swisvc.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT ¶o3Io2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION oa?/w 24 of 189 94095603SDD PLN

4.1.9. Com485.s acia s clock.s combuf s comi485i s pcb.s I

inthd.s cornmoas conf's swisvc. s DATE T[TLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o/3/02 -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 263076 PRODUCTION 1 25 of 189 PLN

4.1.10. Common.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o,3102 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION £"W4 26 of 189 9496DD P PLN

4.1.11. Comsub.s clock-s comsubi s inc-equ s macrollb s comons confs error.s libra s swisvc.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1oY31 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,Ob4' 27 of 189 PLN

4.1.12. Conf.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR-RADIATION MANAGEMENT 1232 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION -I/fM 28 of 189 PLN

4.1.13. Dbasub.s comsub.s entsvc.s host485.s inc-equ s macrolib.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10/23/02 9405603 RELEASED FOR DOC CTRL SHEET NO SIZE REV ECN NO.

2 3076 PRODUCTION I YtyW(l& 29 of 189 PLN

4.1.14. Dspsvc.s clocks dspsvci.s erron s icne qu. s macrohb.s dspsvc.s commons confs error.s libras swisvc s SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV 2

ECN NO.

3076 O94095603SDD ILN I

4.1.15. Eesvc.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATIONMANAGEMENT 10/23/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 9?,Y.*' 1 31 of 189 1 PLN

4.1.16. Entsvc.s clock. s inc_equ.s macrolib.s dspsvc.s dbasub.s libra.s swisvc.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o23Io2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION IYu(t 32 of 189 940 PLN

4.1.17. Error.s dspsvc.s erroti s comsub.s macrohb.s I I F common s conEs swisvc.s DATE T[TLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT IQo23102 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SE 2 3076 PRODUCTION 941,"'X 33 of 189 PLN

4.1.18. Host485.s combufs confi.s incequ.s macrolib.s pcb.s com485.s commons confs ia.mhd s libra s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1013/ 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO SIZE 2 3076 PRODUCTION I Orf*l 1 34 of 189 94095603SDD PLN

4.1.19. Idspsvc.s I I EIbraL C onnr i~~

s1. conf s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 123/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 3076 PRODUCTION *?*/,Y( 35 of 189 94095603SDD7 PIN 2

4.1.20. Inthnd.s confE,s com485.s host485.s inth :dis DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 9SIZE 2 3076 PRODUCTION ,*,z*. 36 of 189PL 940 95603SDD 1

4.1.21. Libra.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1 0/312 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 3076 PRODUCTION ,*?¥*d 37 of 189 9429PC N3SDD PLN 2

4.1.22. Nmi8.s clock.s inc-equ s nmiai.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10-23102 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET No. SIZE 2 3076 PRODUCTION .9I4y, 38 of 189 94095603SDD PLN

4.1.23. Setedt.s conmmoa~s libra.s swisvc.s DATE 1 TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603

-o13/o2 REV ECN NO. RELEASED FOR IDOC 3 9 - 94095603SDD SIE 2 13076 PRODUCTION ~Y( 39 of 1891 L

4.1.24. Swisvc.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT -o-/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ý9?I1# 40 of 189 PLN

I 4.2. Interprocess Dependencies See Appendix A for drawings.

4.2.1. Reset Circuitry The reset circuit generates a 650 ms wide low pulse to the MPU reset input and various external registers. The RI/C1 network generates a delayed trigger pulse to the U10 multivibrator. Upon power up, C1 charges through R1. When approximately 1.4 volts is reached, U11-8 goes low, triggering UIO. U10-4 returns high and UI0-13 returns low. The low to high transition on UI0-4 signals the MPU to begin a reset sequence.

4.2.2. Clocks The system clock is generated by the MPU using a 4 MHz crystal, CR1. The system clock, from which others are derived, is an output on the MPU pin 37 and operates at 1MHz.

4.2.3. NMI Clock The NMI clock is generated by U30, U31, and U32 , which are dual decade counters.

The 1 MHz system clock is applied to the U30-1 input. U30 is a divide by 100 counter, while U31 is a divide by 50 counter, with respect to the input frequency.

U30-9's output is 10kHz and U31-9's output is 200 Hz. U32 is connected for operation as a divide by 25 counter, which produces an 8 Hz output on U32-9.

4.2.4. Write Cycle Clock The Write Cycle Clock is generated by U19. The 1 MHz system clock is applied to the U19-2 input, which is adjusted via VRI3 for a-225 ns delay from the falling clock edge. The second stage of U19 produces a 225 ns output pulse width.

4.2.5. Address Drivers Line drivers U12 (low order addresses and U13 (high order addresses) provide signal buffering and capability to drive 15 TTL's unit loads for the address bus. The output drives are all internal devices utilizing address signals on the main circuit board as well as the J3 option interface bus connector for additional circuit boards.

PROM 8000 directly drives the enable pins on the PROM. RAM 0000, RAM 2000, and RAM Read are logic OR'd with Clock from U17. RAM Read drives the RAM output. Enable pins RAM 0000 and RAM 2000 act as chip enables for the appropriate RAM. RAM Write is logic OR'd with Write 02 U17, which is connected to the write enable pins on the rams. The 5000 Block output signal is applied to driver U74 and connect to J3, the optional connector.

4.2.6. PROM This is typically a 27256 which is a UV erasable 32Kx 8 bit PROM. U23, which responds to address 8000-FFFF, is always present. U23 contains the operating program for the UDR (firmware).

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 123102 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 9SIE 2 3076 PRODUCTION *;IY'1, 41 of 189 94095603SDD0 PIN

4.2.7. RAM U21 is utilized for temporary data storage. U21, which responds to address 0000 1FFF (8Kx 8 bit), is always present. Data stored in the RAM is lost on power down.

4.2.8. EEPROM Sixteen (16) monitor specific, operator entered set points are stored in 64 bytes of non-volatile electrically erasable memory. U33 provides storage for the set points (256 bytes max.). U35 is an 8-bit control register.

4.2.9. Data Transceivers Data Transceiver U16 is an octal tn-state bi-directional transceiver which provides drive capability to the data bus.

Data transceiver U73 provides buffer and drive capability to the extemal data bus interface, available for optional circuit boards on J3.

4.2.10. Control Signal Buffer Line driver U18 provides a signal drive forboard. all system control signals and clocks utilized by circuitry within the main circuit Line driver U74 provides the drive for control lines and clock signals for external circuitry utilizing the J3 option interface connector.

4.2.11. Address Decoding The master decoder (U14) is an open-collector 32 x 8 bit bipolar PROM. Address lines A15, A14, A13, and A12 as well as read/write are used to decode memory and I/O addresses in 4K hex blocks.

4.2.12. Relay Control Register (Write Only)

The Relay Control Register (U44) is an 8 bit register with clear, and responds to address 400C. Upon initial power-up, the system reset signal sets all outputs low.

Data written into U44 remains at the outputs until a reset occurs or new data is written. With the exception of the fail bit (DO), all outputs are applied to U48, which is an inverting open collector driver. The outputs of U48, including fail, drive (via the J2 connector) mechanical relays located on the relay board. The fail bit is used as an input to U47-3, which, when set high-low-high once per second, causes output U47-6 to remain low. Should this high-low-high sequence fail to occur (under MPU control),

U47 will time out and set U47-6 high, causing the fail indicator on the panel and fail relay to de-activate. U48 also drives the remote indicator (when used) on the front panel.

4.2.13. Bar graph (Write Only)

The bar graph addresses are decoded by U5, which is a 1 of 8 decoder. Control line inputs to U5 are RIW, Write 02, and Bar graph. The bar graph contains 24 segments, with 3 segments allotted to each decade. Each of the three segments illuminates at approximately 25, 50, and 75% of each decade.

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4.2.14. Read-Write Cycles A read cycle is performed by sequencing RAM 0000 and RAM Read, while RAM Write is held high (inactive). The address (A0 - Al 2) are latched by the falling edge of RAM 0000. Data becomes valid approximately 250 ns later.

A write cycle is performed by sequencing RAM 000 and RAM Write, while holding RAM Read high (inactive). Identical to the read cycle, the address (AO- A12) are latched by the falling edge of RAM 000. Data is strobed into RAM on falling edge of RAM Write.

4.2.15. Write Register Decoding Decoding for write registers within the main circuit board is performed by U2, which is a 1 of 8 decoder. Control signals for U2 are Reg. Select, R/W (active high), Write 02 as well as addresses Al, A2, and A3. U2 decodes two addresses per output, starting at 4000, and ending with 400E. These outputs are active low.

4.2.16. Counter Control (Write Only)

The counter control register (U43) is an 8 bit register with clear, and responds to address 400A. Upon initial power-up, the system resets all outputs low. Data written into U43 remains at the outputs until a reset occurs or new data is written.

4.2.17. Display Control (Write Only)

Registers U71 and U72 are used to control and display data on the front panel 7 segment displays. Five digits are used along with two spare digit drive signals. The display control register (U71) is an 8-bit register, utilizing four data bits (DO-D3). The display data register (U72) is also an 8-bit register utilizing five data bits (DO-D4).

Both U71 and U72 outputs are reset (low) upon initial power-up.

U71 is used to select the digit to be written as well as to set the WRITE bit input to

-U75 -the display controller.- U72 is used to enter the data to be written and a decimal point for the selected digit.

U75 is a universal eight digit 7-segment LED driver controller used with common anode devices. Address inputs (AO-A2), supplied by U71, are used to select the digit.

Data inputs DO-D3 and the decimal point, supplied by U72, are used to enter data in the selected digit.

The display controller contains all necessary circuitry including address decoding, static RAM, and multiplex oscillator for interdigit blanking.

4.2.18. Status Indicators (Write Only)

The status register (U60) is an 8-bit register with clear, and responds to address S4000. Data written into U60 remains at the outputs until a reset occurs or new data is written. Upon initial power-up, the system reset signal sets all outputs low.

U60 outputs, when high, control U61 inverter/driver to activate the appropriate front panel status indicators. U60 outputs, when low, control U61 to deactivate the appropriate front panel status indicators.

4.2.19. Data Entry (Read Only)

Octal buffer U36 functions as an interface to supply the status of the switches for data entry to the internal data bus address (4002).

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4.2.20. Gross Counter (Read Only)

The gross counter register. Octal buffer/drivers U40 (4004) and U41 (4006) interface the low and high counter bytes to the data bus from U45 an U46 respectively. Dual module 16 counters (U45, U46) accumulate counts from the signal processing circuitry over a program controlled sample period and make this data available to the MPU. A high level on U45 pins 2 and 12, and U46 pins 2 and 12 cause the counters to clear in anticipation of a sample being initiated. A low level activates the counters to accept pulses from the signal processing circuitry. Maximum count for a sample period is 32,768. When this count is achieved, U46 pin 8 goes high which causes the pulse counting to stop. This condition is recognized by the MPU as an indication of counter overflow.

4.2.21. Digital to Analog - Converter and Output Circuitry (Write Only)

The D/A converter (U82) is an 8-bit buffered multiplying device which responds to address 4004. Data is written and latched by U82 when CS and WR are active (low). The converter is configured for unipolar operation with a voltage reference of

+ IOVDC.

U81 operation amplifier I buffers the converter output to drive the three analog output circuits. This voltage is also provided to J4, analog option connector. J4 is provided with the necessary supply voltages to configure a custom analog output range for special applications. U81 operational amplifier 3 provides the user with a 0

- 10 volt analog output. VR1 is the zero adjustment and VR2 is the gain adjustment for the 0- 10 volts output.

The circuitry comprised of U80 operational amplifiers 1 and 2, as well as U81 operational amplifier 2, provides a 4 - 20 mA reading on the output. U81 operational amplifier 2 and Q1 are configured as a constant current source controlled by the output of U80 operational amplifier 1. The positive feedback circuitry, comprised of

--R41 and R43, ensures that the output current will remain constant regardless of the output load impedance. The maximum load impedance is 500 ohms.

The circuitry comprised of U80 operational amplifiers 3 and 4 as well as U81 operational amplifier 4 provides a second 4 -20 mA user output.

VR6 is adjusted to obtain a 4 mA reading at the output and VR5 is adjusted to obtain a 20 mA reading at the output.

4.2.22. Read Register Decoding Decoding for READ registers within the main circuit board is performed by U34, which is a I of 8 decoder. Control signals for U34 are REG SELECT, and R/W (active high) as well as address Al, A2, and A3. U34 decodes address per output, starting with 4000 and ending 400E. These outputs are active low.

4.2.23. Option Board Bus The option board bus is available on connector J3. All address, data and control

-signals are provided to-allow-various digital/analog circuit boards to directly interface

-to the main circuit board. Decoded signals for asynchronous communications interface adapter option, and the general purpose interface bus option are available on the option board interface connector.

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4.2.24. Signal Input Cirduitry Detector input pulse circuitry consists of an input buffer, high/low discriminators, signal detection, anti-jam and signal multiplexer circuits.

4.2.25. Buffer Amplifier The detector input is connected to J6. The input impedance is 50 ohms to match the signal cable and the detector's output impedance. Jumpers JP4 and JP5 are used to select the proper pulse polarity.

The detector input signal (with appropriate polarity jumpers installed) is applied to unity gain buffer amplifier U90. VR8 is used to fine adjust for unity gain. Regardless of input signal polarity, U90-6 outputs positive going pulses. VR9 is a zero offset adjust for U90. The buffer amplifier output is provided to the J7 connector (for use by analyzer option circuitry) as well as the high and low discriminators. TP-Pulse is available as a test.

4.2.26. Discriminators The low level discriminator is comprised of comparator U91 device 2 and associated circuitry. VRI I is used to set the trip threshold. The adjustment range is 50 mV to 1 volt, which can be measured at the low discriminator test jack. As the positive pulse, applied to the input, passes through the trip threshold, the output (U91-6) is forced low. When the pulse returns through the trip threshold, the output U91-6 returns high and ready to accept another input pulse. Pulses below the trip threshold do not trigger the output.

The high discriminator is comprised of comparator U91 device I and associated circuitry. VRIO is used to set the trip point. The adjustment range is 3.5 to 7.5 volts, which can be measured at the high discriminator test jack. As the positive pulse, applied to the input, passes through the trip threshold, the output (U91 device 1) is

-forced low. -When the pulse retums through the trip threshold,- the output (U91 device 1) return high and is ready to accept another input pulse. Pulses below the trip threshold do not trigger the output.

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4.2.27. Option Jumper Select (Read Only)

Octal buffer U42 fuhctions as an interface to provide the status of the option jumpers for sensitivity selection, alarm reset operation, alarm operation in check source, fail operation, anti-jam bit data, and serial data from EEPROM to the internal data bus and MPU. U42 responds to address 4008. The sensitivity read functions are in the table below.

Data Bit Function DO Serial data from EEPROM DI Anti-Jam D2 (not used)

D3 JP3-5 (IN) Inhibit alarms during check source operation (factory setting)

(OUT) Alarms active during check source operation D4 JP3-4 (IN) Fails in five minutes with no count (factory setting)

(OUT) Does not fail D5 JP3-3 (IN) Manual reset of alarms (factory setting)

(OUT) Auto alarm acknowledge, after counts return to normal JP3 jumper IN - MPU reads a low (0)

JP3 jumper OUT - MPU reads a high (1) 4.2.28. Switch Inputs Octal inverting buffer U62 functions as an interface to provide the status of the front panel control switches to the internal data bus and MPU. U62 responds to address 4000.

When a switch is pressed, the appropriate input to U62 is pulled low. When U62 is read by the MPU, a high-(1) is available on the data bus. When no switches have been pressed, all output (U62) will be low when read. U63 is a latch which latches switch data from the check source and alarm acknowledge switches. The MPU controls the clear switch latch signal to reset U63. The circuit comprised by SI, D1, and R1 1 is a remote alarm acknowledge. R11 is selected to allow a 20 mA signal to flow through the S1 infrared diode when a given voltage is present on the J9 remote acknowledge input. When this voltage is present, the S1 infrared diode is forward biased, causing the S1 phototransistor to conduct. This effectively forces a low (0) to U63-10, setting the alarm acknowledge bit.

4.2.29. Signal Detection The circuitry comprised of flip-flop U93 and inverters U1 I and U94, utilizes the low discriminator and high discriminator outputs to ensure that only input signals which peak between the discriminators are made available to the gross counters.

When U93-2 counter enable is brought high, under software control to initiate a

--- sample periodand the-low discriminator threshold is exceeded, a positive going

--edge on U93-3 clocks a high into flip-flop U93-5. -Assuming the high discriminator has not bee exceeded, when the input pulse returns through the low discriminator DATE 12 TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10 3/02 9405603 REV ECN NO. RELEASED FOR I DOC CR SE I 46 S 89 94095603SDD 2 13076 PRODUCTION 0"M 46 of 189 1PIN

threshold, a positive going edge on U93-11 clocks the high on U93-12 to the output U93-9.

A delayed positive pulse produced by the R/C network (R80/C35) on U93-13 allows the flip-flop U93-9 to remain high until the delayed pulse onU93-13 returns low, which resets the output U93-9 low. U93-9 is connected to the signal multiplexer circuitry.

When an input pulse exceeds both the high and low discriminators , the high (U93-5) clocked by the transition through the low discriminator is reset by the low (U91-1) resulting from the transition through the high discriminator. This action causes no pulse to be generated at U93-9.

4.2.30. Signal Multiplexer The signal multiplexer comprised of UI01, U102, and U94 allows the MPU to select wither the radiation pulse or the frequency output representing the high voltage to be input to the gross counters. When counter enable is active (high), the signal detection circuit output (representing radiation) is routed to the gross counters.

When HV select is active (high), the HV frequency is routed to the gross counters.

The outputs connected to pull-up resistor R81, are open collectors allowing the most significant bit of the counters to force this node low, effectively terminating the pulse input to the counters and indicating an overflow condition.

4.2.31. Anti-Jam Circuitry The anti-jam circuitry allows for the detection of rapid increase in pulses (due to a rapid increase in radiation at the detector) and provides a bit to the sensitivity select register. A detector will reach a point, in a very high radiation field, when it will no longer provide pulses, but conducts continuously. The absence of pulses would normally indicate a low radiation field, when in actuality this is not the case. The purpose of the anti-jam circuit is to detect that this situation is about to occur, and to indicate it to the MPU. The MPU will then shut down the high voltage.

-The input to the anti-jam circuit is provided by the low discriminator output (U91-6).

JP-7 selects detector type, 1-2 for scintillation detectors and 2-3 for GM type. Q3 turns ON/OFF with input pulses, which allows C39 to charge to an average DC level.

VR12 (adjustment range 0 to 1.6 volts) is used to adjust the trip threshold on comparator U92-2. When the repetition rate of the input pulse causes C39 to charge and the DC level to exceed the threshold, comparator output U92-1 (low in normal operation) is forced high. When this occurs, U96-2 goes high (U96-1 is high after power-up) U93-3 goes low and U96-4 goes high. Diode D9 effectively latches this circuit in the jam mode. That is, if C39 discharges (due to absence of input pulses) and U92-1 goes low, D9 becomes forward biased which holds U92-2 high.

The high, now on U96-4 causes Q4 to turn on driving Q5 on, forcing U96-8 & 9 node to ground. In normal operation, JP6 is in position 1-2 allowing high current flow through F1 (1/20 Amp fuse) causing it to blow. R82 will now hold U96-8 & 9 node to ground, causing U96-1 0 (anti-jam bit) to be active (high). At this point, normal operation can only be achieved by replacing fuse Fl. Jumper JP6 - position 2-3 is for test purposes only and allows fuse F1 to be removed from the circuit and R79 provides pull-up to + 5 volts. In this mode, cycling of power resets the anti-jam circuit. R93/C41 on U96-1 provides a delay from power up to inhibit false tripping of the anti-jam circuit. The anti-jam set point is based on the maximum counting range of the detector, and is set at approximately 40,000Hz.

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In the event the monitored radiation increases above the calibrated range of the detector, but below the anti-jam threshold, provisions are included in the firmware to indicate an OVERRANGE condition by displaying EEEEE on the display.

The OVERRANGE set point is based on the specific type og Geiger-Mueller tube detector used for each range. The G-M detector used for each range exhibit different response characteristics, in terms of the pulses, or counts, provided per mR/h. The OVERRANGE set point is equal to the maximum calibrated range for each type of detector. The set points for each range are as follows:

Range, Typical Equivalent (Max range is Conversion Trip equal to OVERRANGE Constant, Frequency, set point), mR/h: mR/h/CPM: Hz:

1.00E-2 to 1.OOE+3 1.00E-3 16,667 1.00E-1 to 1.00E+4 1.OOE-2 16,667 1.00E0 to 1.OOE+5 1.OOE-1 16,667 1

4.2.32. High Voltage Supply The high voltage is utilized by a GM detector (typical range 500 volts to 650 volts).

The adjustment range of the HV supply is 300 Vdc to 1800 Vdc. The HV output is short circuit proof in that it will current limit the oscillator section within ten seconds of the output being shorted.

R5 and associated circuitry provide the DC voltage adjustment to U1 device 3. The output U1-8 will vary under control of R5.

Short circuit protection is provided by the PTC thermister. The PTC resistance in normal operation is nominally 5 ohms. When the high voltage output is shorted, the control circuitry U1 device 1 attempts to maintain regulation by increasing the base drive for transistor Q1. Excessive current flows through the PTC, causing the internal temperature to increase. As the temperature increases, the PTC resistance also increases dramatically. The effect is that the control voltage to the oscillator is decreased to a minimum level. The response of the PTC is approximately ten seconds. Removal of the short circuit condition results in restoration of the high voltage to the preset level.

4.2.33. Relay Circuit Board The relay circuit board contains five independently controlled mechanical relays.

Each relay provides two Form C sets of contacts with the exception of the check source and High alarm relays, which provide a single Form C set of contacts for

--customer use. Interconnectionis from J2 on-the relay board to J2 on the main circuit board.-The control signals-(active low) and +_15 volts common are provided. The relays perform the following functions: Spare, Check Source, Fail, Warn, and High Alam. The relay contacts are provided to the user via rear panel connector P1.

Varistors (V1-V16) provide transient protection across the contacts.

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4.2.34. Front Panel Circuit Board The front panel circuit board consists of the 7 segment display, backlights for engineering units, status indicators, switches, and bargraph assembly. The front panel interfaces to the main circuit board via interconnecting row 100, 200, and 300.

The main power switch also mounts to the front panel circuit board.

4.2.35. Power Supply The UDR power supply is rated at +5 volts @ 3 amps, +15 volts @2.0 amps, and

-15 volts @ 0.5 amps. The input is user selectable at 115 Vac (92 to 132 Vac) or 230 Vac (180 to 264 Vac). The power supply is designed to meet safety requirements UL/CSANDE. EMI emissions comply with FCC/Class B requirements.

The AC input to the power supply may range from 90 to 204 Vdc @ 50.60 Hz. The 956A must be configured for use at 125 Vac, 50/60 Hz as a factory option.

The power supply provides all internal UDR voltages as well as detector supply voltages. All outputs are protected with automatic recovery upon removal or short circuit condition.

4.2.36. Optional Circuit Boards Option circuit boards are installed into the 50 pin J3 connector available on the main circuit board. As many as three option boards may be stacked into the J3 bus. The analog input, RS232 communications, and Single channel analyzer option boards must be configured into the code prior to assembly. The 94095603 PROM does not support the analog input and Single channel analyzer option boards.

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4.2.37. Option Jumpers -.

Jumper Function Position Operation JP1 Microprocessor Reset Out Normal Operation (Factory setting)

In Not Applicable JP2 PROM Type 1-2 PROM 27128 2-3 PROM 27256 (Factory setting)

JP3-1 / Statistical Accuracy Out/Out 2% Accuracy (9604 counts)

JP3-2 Out/in 5% Accuracy (1537 counts)

In/Out 10% Accuracy (384 counts)

In/In Fixed one second display update (Factory setting)

JP-3-3 Alarm Acknowledge In Manual Acknowledge (Factory setting)

Out Automatic JP3-4 Fail Alarm In Enable no counts fail alarm (Factory setting)

Out Inhibit no counts fail alarm JP3-5 Check Source Alarm In Alarm Inhibited (factory setting)

Out Alarm Enabled JP4 Input Pulse Selection 1-2 Negative input pulse 2-3 Positive input pulse - GM Detectors (Factory setting)

JP5 Shield Polarity Selection 1-2 Shield for negative pulse 2-3 Shield for positive pulse (GM)

(Factory setting)

JP6 Anti-Jam Fuse Selection 1-2 Enable for normal operation (Factory setting) 2-3 Anti-Jam circuit fuse bypassed (testing)

JP7 Detector Type for Anti-Jam 1-2 Scintillation circuit timing 2-3 GM Tube (Factory setting)

Out Anti-Jam circuit disabled (testing) 4.3. Data Dependencies Data is entered via pushbuttons on front panel, a rotary function switch and data entry pushbuttons. It is then converted to the appropriate format.

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5. Interface Description This section describes the interface that each architectural component provides.

5.1. Module Interface 5.1.1. Include modules:

These modules define variables or constants that are used in more than one source module or throughout a source module.

5.1.1.1. Acia.s - included in:

5.1.1.1.1. Com485.s 5.1.1.2. Alrsvci.s - Included in:

5.1.1.2.1. Alrsvc.s 5.1.1.3. Calsvci.s - Included in:

5.1.1.3.1. Calsvc.s 5.1.1.4. Com232i.s- Included in:

5.1.1.4.1. Com232.s 5.1.1.4.2. Conf.s 5.1.1.5. Com485i.s - included in:

5.1.1.5.1. Com485.s 5.1.1.6. Combuf.s - Included in:

5.1.1.6.1. Com485.s 5.1.1.6.2. Host485.s 5.1.1.7. Commoni.s - Included in:

5.1.1.7.1. Common.s 5.1.1.8. Comsubi.s - Included in:

5.1.1.8.1. Comsub.s 5.1.1.9. Confi.s - Included in:

5.1.1.9.1. Clock.s 5.1.1.9.2. Conf.s 5.1.1.9.3. Host485.s 5.1.1.9.4. Inthnd.s 5.1.1.10. Dspsvci.s- Included in:

5.1.1.10.1. Dspsvc.s 5.1.1.11. Errori.s-Included in:

5.1.1.11.1. Dspsvc.s 5.1.1.11.2. Error.s 5.1.1.12. Incequ.s-included in:

5.1.1.12.1. Alrsvc.s 5.1.1.12.2. Anaout.s 5.1.1.12.3. Calc.s 5.1.1.12.4. Calsvc.s 5.1.1.12.5. Chksvc.s 5.1.1.12.6. Clock.s 5.1.1.12.7. Cntsvc.s 5.1.1.12.8. Comsub.s 5.1.1.12.9. Dbasub.s 5.1.1.12.10. Dspsvc.s 5.1.1.12.11. Eesvc.s 5.1.1.12.12. Entsvc.s DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCORRADIATION MANAGEMENT ¶-3Io2 -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 9DSi 2 3076 PRODUCTION . 51 of 189 PLN

5.1.1.12.13. Host485.s 5.1.1.12.14. Nmi8.s 5.1.1.13. Inthndi.s - Included in:

5.1.1.13.1. Inthnd.s 5.1.1.14. Macrolib.s-lncluded in:

5.1.1.14.1. Alrsvc.s 5.1.1.14.2. Anaout.s 5.1.1.14.3. Calc.s 5.1.1.14.4. Calsvc.s 5.1.1.14.5. Clock.c 5.1.1.14.6. Cntsvc.s 5.1.1.14.7. Com232.s 5.1.1.14.8. Comsub.s 5.1.1.14.9. Dbasub.s 5.1.1.14.10. Dspsvc.s 5.1.1.14.11. Eesvc.s 5.1.1.14.12. Entsvc.s 5.1.1.14.13. Error.s 5.1.1.14.14. Host485.s 5.1.1.14.15. ldspsvc.s 5.1.1.14.16. Libra.s 5.1.1.14.17. Setedt.s 5.1.1.14.18. Swisvc.s 5.1.1.15. Nmi8i.s- Included in:

5.1.1.15.1. Nmi8.s 5.1.1.16. Pcb.s- Included in:

5.1.1.16.1. Com485.s 5.1.1.16.2. Host485.s 5.1.2. Source Modules:

Modules made up of assemble code that enables the UDR to perform all the required functions.

5.1.2.1. Alrsv.s, Alarm Service - called in main loop 5.1.2.2. Anaout.s, Analog output- called in main loop 5.1.2.3. Calc.s, Display Calculation - called in main loop 5.1.2.4. Calsvc.s, Calibration Services - called in main loop 5.1.2.5. Chksvc.s, Checksource Services - called in main loop 5.1.2.6., Clock.s, Scheduling services - this is the main loop 5.1.2.7. Cntsvc.s, Deadtime Correction - called in main loop 5.1.2.8. Com232.s, RS232 Communication - called in main loop 5.1.2.9. Com485.s, RS485 Communication - called in main loop 5.1.2.10. Dbasub.s, Setpoint services- called in main loop 5.1.2.11. Dspsvc.s, Display Services-called in main loop 5.1.2.12. Eesvc.s, EEPROM Services- called in main loop 5.1.2.13. Entsvc.s, Service data entry buttons - called in main loop 5.1.2.14. Host485.s, Host Message Replay Services - called by the interrupt service routine DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1 3/o2 -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,? %(

1 52 of 189 PLN

5.1.2.15. Intdsp.s; Display Conversion - called in main loop 5.1.2.16. Inthnd.s, Interrupt Handler- called in main loop 5.1.3 Support Modules 5.1.3.1 Common.s -This modules contains any variable or table that is either used by more than one module or is dependent on the monitor's configuration.

5.1.3.2 Comsub.s - The ACIA buffer is queued in the COM232 module and pulled in here to execute the command and store the response in the ACIA buffer.

5.1.3.3 Conf.s - The UDR MONSTAT option equates.

5.1.3.4 Error.s 5.1.3.5 Libra.s - Subroutine library used by several functions.

5.1.3.6 Nmi8.s - 8 Hz interrupt service routine that is connected to a clock which ticks 4 times per second.

5.1.3.7 Setedt.s - Counts routines used with data entry button services.

5.1.3.8 Swisvc.s - Supervisory services - contains routine that do basic functions for several routines.

5.2. Process Interface The Victoreen Model 956A UDR receives signals from a specific detector. The UDR also receives input from the user via the pushbuttons on the front panel and the data entry rotary switch and pushbuttons. Analog output is also generated for specific events.

5.3. Process description The Victoreen Model 956A UDR continuously displays radiation levels, indicates alarms, and provides display, control and annunciation functions. The UDR also provides channel calibration and test functionality in combination with the detector.

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6. Detailed Design This section contains the details needed by a programmer prior to implementation.

6.1. Module Detailed Design 6.1.1. Include Modules:

6.1.1.1. Acia.s 6.1.1.1.1. Defines offsets for Data, Status, Command and Control Registers.

6.1.1.1.2. Defines status equates 6.1.1.1.3. Defines command equates 6.1.1.2. Alrsvci.s - alarm serve equates 6.1.1.2.1. Defines alarm service equates for 5 min. no counts timer and fail bit 6.1.1.3. Calsvci.s - calibrate service equates 6.1.1.3.1. Offset into RAM 6.1.1.3.2. Lights mask onloff 6.1.1.3.3. Alarm high relay 6.1.1.3.4. Warn lights 6.1.1.3.5. Fail relay 6.1.1.4. Com232i.s - RS232 communication equates 6.1.1.4.1. Offsets for ACIA registers 6.1.1.4.2. ACIA status equates 6.1.1.4.3. ACIA command equates 6.1.1.4.4. ACIA buffer equates 6.1.1.4.5. Dumb terminal equates 6.1.1.5. Com485i.s - RS485 Interrupt service equates 6.1.1.5.1. Number of bytes in message types 6.1.1.5.2. Equates for states 6.1.1.5.3. Message error codes 6.1.1.6. Combuf.s - Communication buffer structure 6.1.1.6.1. Equates for offset into communication buffer 6.1.1.7. Commoni.s - Common equates 6.1.1.7.1. Line feed 6.1.1.7.2. RAM upper bound 6.1.1.7.3. End of text 6.1.1.8. Comsubi.s - RS232 Communication commands equates 6.1.1.8.1. Offsets of ACIA register 6.1.1.8.2. ACIA status equates 6.1.1.8.3. ACIA command equates 6.1.1.8.4. ACIA buffer equates 6.1.1.9. Confi.s - 956A UDR configuration equates 6.1.1.9.1. Monitor display 6.1.1.9.2. Conversion constant 6.1.1.9.3. Background subtract 6.1.1.9.4. Anti-Jam___

6.1.1.9.5. -Fail safe --. . .

6.1.1.9.6. Detector type 6.1.1.9.7. Analog option board DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNcOR RADIATION MANAGEMENT 1o13/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SE 2 3076 PRODUCTION *rfZeff 54 of 189 94095603SDD PLN

6.1.1.9.8. RS-232 communication option 6.1.1.9.9. UDR type 6.1.1.9.10. ACIA1 6.1.1.9.11. ACIA2 6.1.1.9.12. SCAN RAD option 6.1.1.10. Dspsvci.s- Display services equates 6.1.1.10.1. Defines High byte and Low byte 6.1.1.10.2. Defines Green registers 6.1.1.10.3. Defines Red registers 6.1.1.11. Errori.s - Setpoint Validity Check equates 6.1.1.11.1. Defines error codes 6.1.1.12. Incequ.s-Common equates 6.1.1.12.1. Defines JAM and OVERRANGE bits 6.1.1.12.2. Defines Scalar Module Addresses 6.1.1.12.3. Defines Status bits 6.1.1.12.4. Defines Relay control bits 6.1.1.12.5. Defines Counter Control bits 6.1.1.12.6. Defines Switch Input bits 6.1.1.12.7. Defines Setpoint EEPROM Address 6.1.1.12.8. Defines Configuration file equates 6.1.1.12.9. Defines display data equates 6.1.1.12.10. Defines sensitivity select/status 6.1.1.12.11. Defines status word bits 6.1.1.13. Inthndi.s - Interrupt handling equates 6.1.1.13.1. Defines IRQ status bit for polling 6.1.1.14. Macrolib.s - 6800 MACRO library 6.1.1.14.1. Store using x 6.1.1.14.2. Test argument to trigger logic analyzer 6-.11:14-3. Task-name . .. .

6.1.1.14.4. Bit set 6.1.1.14.5. Bit clear 6.1.1.14.6. Move X 6.1.1.14.7. Move to X 6.1.1.14.8. Push X 6.1.1.14.9. Pull X 6.1.1.14.10. Add B to X 6.1.1.14.11. Swap X 6.1.1.14.12. Add Constant to X 6.1.1.14.13. Set argument 2 to argument 1 6.1.1.14.14. Add argument 1 to argument 2 and store result in argument 3 6.1.1.14.15. Subtract argument 2 from argument I and store result in argument 3

6.1.1.14.16. Multiply argument 1 by argument 2 and store result in argument 3 6.1.1.14.17. Divide argument 2 by argument I and store result in argument 3 6.1.1.14.18. Compare argument 1 to argument 2 6.1.1.14.19. Convert floating point value to 32 bit integer 6.1.1.14.20. Converts 32 bit integer value to floating point SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT -9405603 REV ECN NO. SIZE 2 13076 94095603SDD PLN

6.1.1.14.21. Converts to complement of argument 6.1.1.14.22. Normalize the argument 6.1.1.14.23. Convert BCD to float 6.1.1.14.24. Convert float to BCD 6.1.1.14.25. Televideo macros 6.1.1.14.26. Compare two 16 bit arguments 6.1.1.15. Nmi8i.s - 8 HZ NMI interrupt service equates 6.1.1.15.1. Enable scalar counter 6.1.1.15.2. Clear scalar counter 6.1.1.16. Pcb.s - Port control block equates 6.1.1.16.1. ACIA address 6.1.1.16.2. Input buffer address 6.1.1.16.3. Output buffer address 6.1.1.16.4. Scratchpad pointer 6.1.1.16.5. Device initialization routine 6.1.1.16.6. Interrupt service routine 6.1.1.16.7. Response routine 6.1.1.16.8. PCB length 6.2. Source Modules 6.2.1. Alrsvc.s - serves alarms, relays and front panel lights, range light (under and over range), fail and Jam conditions. Jam condition is not checked.

Initialize variables ALR:

Get checksource flag Combine with decay timer If checksource not active goto ALR20 Get jumper status If alarms enabled during checksource then goto ALR20 Combine warn mask and high alarm light Complement the result Mask all front panel lights Set high and warn lights to off Goto ALR40 ALR20:

Get the high alarm status Check for errors If no errors then goto ALR23 Clear the status Save status ALR23:

Get the states address table for high alarms Determine current high alarm state Goto current state DATE TrTLE SOFTWARE DESIGN DESCRIPTION, SYNCORRADIATIONMANAGEMENT 1o 31o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION I al-M#W 56 of 189 PLN

ALR30:

Get warn alarm status Check for errors If no errors goto ALR33 Clear status Save status ALR33:

Get the states table addresses for warn states Determine current warn state Goto current state ALR40:

If counting is disabled after power up then goto ALR80 If counting is disabled then goto ALR45 If not in under-range goto ALR41 Set under-range flag Set range alarm Goto ALR60 ALR41:

In under-range flag is not set then goto ALR42 Clear under-range flag Turn under-range light off Indicate normal conditions ALR42:

If counting is not enabled then goto ALR45 If not in over-range then goto ALR43 Set range alarm Set Hyst to normal Goto ALR60 ALR43:

Set the count flag Indicate over-range Set the range alarm Clear over-range flag Enable counting Clear the software acknowledge flag ALR60:

If no anti-jam option then goto ALR63 If not hardware jam then goto ALR61 Turn on fail light De-energize relay Turn on range light Set jam indicator Turn high voltage off Updatescalar-register . . .

Set fail flag . .

Disable counting Goto ALR80 1o3 SYNcOR RADIA11o0 4IMANGEMENNT 103/02 TITLE 9405603 DESCRIPTION, SOFTWARE DESIGN DATE REV ECN NO. NO. SIZE 2 3076 94095603SDD PLN

ALR61:

If not option no-counts fail then goto ALR80 ALR63:

If no-counts fail goto ALR64 Iftimer equal zero goto ALR67 Clear timer ALR67:

Iffail flag is set then goto ALR8O Reset range flag Reset fail flag Energize fail relay Set fail flag Save the status Goto ALR80 ALR64:

If unit is in fail then goto ALR80 Increment the timer Save the timer If unit is not in fail then goto ALR80 Turn on fail light De-energize relay Turn on range light Get fail flag Set fail status ALR80:

Set/reset relays Save relay status Update lights Save light status . .

ALR99:

Return to caller STATEO: high alarm state 0 routine - no high alarm If not in high alarm then goto ST040 If fail safe then goto ST010 Release high alarm relay Update relay status Save relay status Goto ST012 STO010:

Activate high alarm relay Update relay status Save relay status DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 103/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION I &Z[1a 58 of 189 9 PLN

ST012:

Turn high alarm light on Update light status Save light status ST020:

If not auto alarm then goto ST030 Increment high alarm state ST030:

Increment high alarm state ST040:

Return to caller STATE1: high alarm state 1 routine - unacknowledged high alarm If high alarm has not been acknowledged then goto ST1 10 Turn high alarm light on Update light status Save light status Release the rate relay Update rate relay status Save rate relay status Increment high alarm state Enable counting Clear software acknowledge flag Save software acknowledge flag Goto ST120 ST110:

Flash the high alarm light Activate rate relay Update rate relay status Save rate relay status ST120:

Return to caller STATE2: high alarm state 2 routine - acknowledged high alarm If still in high alarm then goto ST230 Turn high alarm light off Update high alarm light status Save high alarm light status If fail safe then goto ST210 Activate high alarm relay Update high alarm relay status Save status Goto ST220 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o 31o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION .,eff 59 of 189 PLN

ST21 O:

Release high alarm relay Update relay status Save relay status ST220:

Set high alarm state to zero SST230:

Return to caller STATW0: warn alarm state 0 routine - no warn alarm If not in warn then goto STW040 If fail safe then goto STW010 Release warn relay Update relay status Save relay status Goto STWO12 STWV010:

Activate warn relay Update relay status Save relay status STVW012:

Turn warn alarm light on Update warn light status Save warn light status STW020:

If not auto alarm then goto STW030 Increment warn alarm state STW030:

Increment warn alarm state STW040:

Return to caller STATWI: warn alarm state I routine -warn alarm unacknowledged If the alarm has not been acknowledged then goto STW1 10 Turn light on steady Update light status Save light status Release rate relay Update rate relay status Save rate relay status Increment warn alarm state Enable counting Clear software acknowledge flag Update software acknowledge flag Save software acknowledge flag Goto STW120 DATE 1 TITLE SOFTWARE DESIGN DESCRIPTION, ION MANAGEMENT 9405603 I

,ELEASED FOR DOC CTRL SHEET NO. 9 SIZE PRODUCTION ,ZMi. 1"60 of 189 1 PLN

STW1 10:

Flash the warn light Update warn light status Save warn light status Activate rate relay Update rate relay status Save rate relay status STW120:

Return to caller STATW2: warn alarm state 2 routine - warn alarm acknowledged If in warn alarm then goto STW230 Turn wam light off Update light status Save light status If fail safe then goto STW210 Activate rate relay Update rate relay status Save rate relay status Goto STW220 STW21 0:

Release warn relay Update relay status Save relay status STVW220:

Set warn state to zero STVV230:

Return to caller ALRTAB:

Define high alarm state table STATEO - no alarm STATEI - unacknowledged alarm STATE2 - acknowledged alarm VVRNTAB:

Define warn alarm state table STATWO - no alarm STATWI - unacknowledged alarm STATW2 - acknowledged alarm DATE 12/ TLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT o131o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 1 4.141 1 61 of 189 PN603SDL

6.2.2 Anaout.s -Analog output functions Initialize variables ANAOUT:

Call CHKRNG to save low and high ranges Clear floating point total If analog output setpoints are not valid then go to SENDNUM If in calibration mode then goto SENDNUM If checksource timer is active then goto SENDNUM If checksource is on then goto SENDNUM If unit is in fail then goto SENDNUM If in jam then goto MAXNUM If over-range then goto MAXNUM If not under-range then goto CONTRN Goto SENDNUM CONTRN:

If current value is not equal to high scale then goto NXREFPT MAXNUM:

Maximize the floating point total Goto SENDNUM NXREFPT:

If current value is greater than or equal to low scale then goto CONTI Goto SENDNUM CONTI:

Calculate the quotient as current value divided by low scale Call FPLOG to get log of the quotient Divide the log by the number of decades Multiply the result by defined percentage Get the exponent If not valid then goto SENDNUM Get the mantissa, can only be one or two If two digits then goto SENDNUM Right justify the top nibble If greater than or equal to 8 then goto RND Goto SENDNUM RND:

Put the integer in the proper byte SENDNUM:

Get scalar address Get byte that represents current value Move byte into DAC Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOG CTRL SHEET NO. 5SEE 2 3076 PRODUCTION *1 1' 62 of 189 1 PLN

CHKRNG:

Save low scale Save high scale Set range to 1 decade Call GETRNG to get range of low scale If error occurred then goto RNGERR Call GETRNG to get range of high scale If error occurred then goto RNGERR Calculate range in decades by subtracting low range from high range If low range is greater than high range goto RNGERR Save integer range If range equals zero then goto RNGERR Clear analog error flag Clear low nibble If high nibble equals zero then goto NOHIN Increment range Get range mantissa Goto STORNG to store range mantissa NOHIN:

Get the range mantissa Justify to high nibble STORNG:

Store range mantissa Goto RNGEX RNGERR:

Set analog error flag RNGEX:

Return to caller TABLE: table used by the FPLOG routine FPLOG: routine to compute the common logarithm (base 10)

Initialize variables BIGLOOP:

Call ST_X_Z to store initial 4 byte number (xarg) in shifted version (zarg)

Make a copy of counter While counter not zero do begin Call SHIFT to shift zarg right by 1 Decrement counter End while loop TSTEND:

If first byte of xarg not equal to 41H then goto COMP If second byte of xarg not equal to 10H then goto NOSTP Goto STOP NOSTP: (label needed for addressing)

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 123102 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,*(4 63 of 189 94095603SDD3 Pn.~LN

COMP:

Call FSjB to calculate difference of xarg and zarg Get exponent of difference If exponent is less than 41H then goto SHFT REDVAL:

Store difference Goto ST X Z Make a copy of counter While counter not equal to zero do begin Call SHIFT to shift zarg Decrement counter End while loop Get TABLE starting address Call BX4TOX to set X = (B*4) + X Save the results Get address of newv Load and store each byte Goto BIGLOOP SHFT:

Call SHIFT to shift zarg right one bit Increment calculation parameter If calculation parameter equal 16 goto STOP Goto TSTEND STOP:

Get the address of xarg Move each byte of yarg into xarg Return to caller ST_X_Z: routine to store xarg in zarg Get the address of xarg Move each byte of xarg into zarg Return to caller SHIFT: routine to shift zarg right one bit Save A and B on stack Get the address of zarg Shift the first byte of the mantissa to the right If normalization is not needed goto GO-ON Restore the first byte of the mantissa Initialize a counter DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT I 2/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION I ?Z'w 64 of 189 PLN

TAKOFF:

Shift ,the bottom byte to the left Rotate byte left 2 bit positions Rotate byte left 1 bit position Decrement the counter If counter not equal to zero goto TAKOFF Goto OUTTA GO ON:

"Bringback the carry bit Rotate byte right 2 bit positions Rotate byte right 3 bit positions OUTTA:

Pull A and B off the stack Return to caller GETRNG: routine to get the range in decades, input is at X, return range is at A Initialize range to zero Save range Get start of powers of ten table While not end of table do begin If range number equal to entry in table then goto GOTRNG Increment table pointer End while GOTRNG:

Save range decade Return to caller PTENTBL: Table of powers of ten DATE TITLE SOFTWARE DESIGN DESCRIPTION, ,K SYNCOR RADIATION MANAGEMENT 123/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 3076 PRODUCTION giZyt 1( 65 of 189 PIN

6.2.3 Calc.s - Estimates the counts per minute to within 2, 5, or 10 percent statistical accuracy depending on option jumpers.

Initialize variables Define target count table CPMSVC:

CPM1:

If not end of minute then goto CPM9 Add the new value to the 20 -minute buffer Call AVERAG CPM2:

Round current value Calculate +3 SIGMA, high 3 SIGMA Calculate -3 SIGMA, low 3 SIGMA Set counter to 1 CPM6:

While counter is less than 19 do begin Point to 20minute data Call LOCATE If no data then go to CPM8 If value is greater than or equal to high 3 SIGMA then goto CPM8 If value is less than or equal to low 3 SIGMA then goto CPM7 Increment counter If target count reached then goto CPM8 End while CPM8:

Float the count Calculate the CPM Set the display update flag Goto CPM10 CPM9:

If the current value is not less than the target then goto CPM1I Set the display update flag Goto CPM10 CPM11:

Clear the display update flag CPM10:

If the display update flag is not set then goto CPM99 If backgroung subtract option is present goto CPM12 Save count values Goto CPM14 CPM12:

Subtract the background Normalize to zero DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCoR RADIATION MANAGEMENT 10 3102 9405603 ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE REV 2 3076 PRODUCTION 9N'U(( 66 of 189 94095603SDD PLN

CPM14:

If conveegion constant option is present then goto CPM17 Save values as MPH Goto CPM99 CPM17:

Multiply in conversion constamt CPM99:

Return to caller RESETC: routine to reset channels Get the second queue Call CLEARQ to clear the queue Get the minute queue Call CLEARQ to clear the queue Initialize current MPH to 4000H Initialize current value to 4000H Set timer to 59 Return to caller CPMI:

Get 20 minute buffer Call INITQ to initialize buffer Initialize FP3 to 4130H Select target counts according to option register setting Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o23IO2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SUE 2 3076 PRODUCTION £3?4' 67 of 189 PLN

6.2.4 Calsvc.s - Calibi'ation service Initialize variables CALSVC:

If in state 1 then begin Blank system lights Save light status Turn High Alarm Off Turn Warn Alarm Off Check Monitor status flags If fail safe relays then begin De-energize wam relay De-energize high relay Goto NOFSI End if If no fail safe relay then begin Energize wam relay Energize high relay End if NOFAILI:

De-energize the fail relay Save the relay status Set the calibration value to 0 Goto XREFCAL End state 1 If in state 2 then begin Turn on System lights Save light status Check calibration value If STP is okay then goto STPOK1 Use maximum value STPOK1:

Initialize scalars Set to run state Goto XREFCAL End in state 2 If not in state 3 then goto CC4 Get the timer If timed out then goto CALOUT Save the timer Convert to floating point Calculate the sum Save the sum Toggle the lights Goto XREFCAL' DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 101302 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION - 68 of 189 PLN

CALOUT:

Turn lights off Save the lights status Indicate last state Goto XREFCAL CC4:

Turn on lights Save light status XREFCAL:

Check STP select switch If switch position 8 is set then goto LEVCAL Set calibrate flag to reset system end exit LEVCAL:

Return to caller CALINI: routine to initialize calibration timer Initialize timer to '423CH' ( 60 seconds)

Return to caller CALMAX:

Defines maximum value of 65,535 seconds DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT Io 3/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 60 3 SDD J PLN 2 3076 PRODUCTION I ?e*# 69 of 189 9

6.2.5 Chksvc.s - Checksource enable/disable. Checksource is kept on while button is held down Initialize variables CHKSVC:

If decay timer is active then begin Decrement timer Iftimer has expired then goto CHK02 Goto CHK99 End if Else goto CHKOI CHK02:

Clear the queues Goto CHK99 CHK01:

Read the switch register Save the switch status to the old status Compare old status with the new status If the status has not changed then goto CHK99 If new status is checksource off the goto CHKOFF If checksource flag is off then goto CHKOFF Call RESETC Save the status Indicate checksource is on Clear the decay timer Goto CHK99 CHKOFF:

Turn off relay Save status .

Update decay timer CHK99:

Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION a, . -if 70 of 189 PLN

6.2.6 Clock.s - Schedule and clock functions Initialize variables RESET: this executes whenever a reset occurs. This happens whenever power comes up, or the Reset line is signaled.

Set up 400H byte stack Get memory starting address While not at upper memory boundary do begin Clear memory Increment memory pointer End while Call RESETC to intialize all the rotating buffers Set delay timer for 5 seconds Inhibit counts for 5 seconds Set units code RST20:

While not end of block do begin Copy floating point number from ROM to RAM End while Goto RST30 RST30:

If fail option is not present then goto RST40 Get the high alarm relay bit Get the warn alarm relay bit Get the rate relay bit Set the bits in the RAM buffer Light the backlight for the engineering units RST40:

Get the options byte If RS-232 option is not available then goto RST46 Get pointer to ACIA table While not end of table do begin Get ACIA routine address If address is NULL then goto RST46 Set parameter for initialization routine Get the ACIA buffer Get the initialization routine Execute the initialization routine If not SCANRAD option then goto NOTCOMSR Set offset to next communication port to 10 Goto CALCOFST NOTCOMSR:

Set offset to next communication port to 8 CALCOFST:

Call ATOX to calculate the next communication port address End while DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SE 2 3076 PRODUCTION LfIf1( 71 of 189 PLN

RST46:

Get the units of radiation RST48:

While not end of unit text do begin Move units's text into temporary buffer End while Turn on the high voltage Set counts information to normal (62H)

Determine number of lines to be printed Set first digit to 1 FH Set next to 00 Set next to 1OH Set next to 1OH Set next to 1FH Set display count to 4 RST53:

While not all digits displayed do begin Increment digit index Save display count Save display data Decrement display count End while INITBL: initialization table Call COMINI Call INTINI Call ENTIN Call CALINI Call CNTINI Call CPMI Call DSPINI Save address of backup indicator as backup indicator Initialize button latch CLOCK: routine to keep the time of day and does not run when counts are inhibited If no communication option then goto CLCK10 Call IRQSVC to check for communication commands CLCK10:

Call ENTSVC Call EESVC DATE 0 TIT SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o 3/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO SIZE 2 3076 PRODUCTION ,LY¥1%W 72 of 189 94095603SDDPLN

CLCK20:

If not in calibration run mode then goto CLCK40 If ticks not equal to zero then goto CLCK30 Get the light status Or the status with OEOH Save the light status Goto CLCK40 CLCK30:

If ticks not equal to 6 then goto CLCK40 Get the light status And the status with 01 FH Save light status CLCK40:

If ready to run flag is not equal to zero then goto CLCK41 Goto SLEEP CLCK41:

Clear the ready to run flag If the noise suppression timer is equal to zero then goto CLCK50 Decrement noise suppression timer Clear the number of counts accumulator Goto CLCK83 CLCK50:

Update the seconds counter Save the seconds counter If seconds counter is less than 60 then goto QGO Clear seconds counter Get minutes counter Increment minutes counter Save minutes counter If minutes counter is less than 60 then goto QGO Clear minutes counter Get hours counter Increment hours counter Save hours counter If hours counter is less than 24 then goto QGO Clear hours counter Get absolute days Increment days Save days QGO:

If calibrate status is equal to zero then goto CLCK80 DATE 0TILE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 3 9405603 ECN NO. RELEASED FOR DOG CTRL SHEET NO. SIZE REV 2 3076 PRODUCTION ,&Z£I 73 of 189 PLN

CHKCAL:

If calibrate is not over then goto NOVCl Clear calibrate status Get units Save units Goto RESET NOVCI:

Clear current units to indicate not normal operation Call DSPSVC - handle the display Call CALSVC - handle calibration Goto CLCK90 CLCK80:

Call DSPSVC - handle the display Call ALR - detect alarms CLCK83:

Call CNTSVC - average/deadtime counts Call CPMSVC - estimate true CPM rate/rad value Call ANAOUT - output CPM to chart Call INTDSP - calculate integer display value Call CHKSVC - process checksource button CLCK90:

Call RESETF - reset watchdog timer CLCK93:

Call RESETA- clear switch latch Get checksource decay timer SLEEP:

Goto CLOCK to wait for interrupt RESETF: routine to reset watchdog timer ( by pulsing fail light) and sleep until Awakened by NMI. (Pulse is 20 microseconds negative)

Get scalar registers Get fail bit Get present relay output Get complement of fail bit Clear fail bit Rewrite output register Call DELAY to wait for 20 microseconds Restore original output Return to caller DATE TI0 TLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o2o2 9405603 RELEASED FOR DOC CTRL SHEET NO. SIZE REV ECN NO.

263076 PRODUCTION ,YjaT 74 of 189 PLN

RESETA: routine to pulse latch clear line Get scalar registers Get clear switch latch Get complement of clear switch latch And with scalar control register Rewrite output Call DELAY to wait for 20 microseconds Restore original output Return to caller DELAY: routine to delay for 20 microseconds Three no operation instructions Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o/3/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 94095603SDD1 2 3076 PRODUCTION 9.°I.f 75 of 189 PLN

6.2.7 Cntsvc.s - Calculates the dead time corrected CPM Initialize variables CNTSVC:

If counts are enabled then goto OVI Goto EXOVC OVI:

Check reset timer If timed out goto OV1_1 Set scalar sum to zero OVI_1:

Get range information If over range goto OV2 Call RESETC to reset channel Clear CPM Goto DONE OV2:

Get the scalar sum Call AVERAG Compute counts per minute Call DEADT to compute deadtime correction If correction not needed then goto DONE Calculate correct CPM for deadtime DONE:

Save the CPM value EXOVC:

Return to caller CNTINI:

Call INITQ Reset timer to 5 seconds Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION,

-SYNCOR RADIATION MANAGEMENT 1O2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 1Y,(-

76 of 189 6 3 SDD J PLN

6.2.8 Com232.s - RS232 communication functions Initialize variables COM232:

Get ACIA buffer Save ACIA butter Get ACIA address Save it in ACIA buffer If interrupt was received then goto COMBO Point to ACIA Point to ACIA If transmit flag is equal to zero then goto COM10 Goto COM99 COM10:

If character is not backspace then goto COM20 If number of input characters is equal to zero then goto COM99 Decrement the number of input characters Decrement input character pointer If result not equal OFFH then goto COM12 Decrement input buffer pointer COM12:

Call ECHO to echo the received character Goto COM99 COM20:

Call ECHO to echo the received character Store the character in the ACIA buffer Increment the number of characters Increment the input buffer pointer If not equal to zero then goto COM25 Increment input buffer pointer COM25:

If character is carriage return then goto COM30 Call ECHO to echo the received character Goto COM99 COM30:

Get the input buffer starting address Disable receiver interrupt Save command register copy Print 'CR' Save 'CR' in the data register Get ACIA starting pointer Call ABX Save the buffer pointer Get the buffer starting address

--- Get-the entry point -

-- If equal to-zero then-goto-COM32 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o 3102 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 01%wf 77 of 189 PLN

Set 6ommand number to 7 Save command number Get the address of the command subroutine table Call ABX Store the command subroutine address in the ACIA buffer Queue the ACIA buffer address in the IRQ queue Set process flag to prevent transmission until response Point to IRQ queue Save ACIA buffer address in queue Update IRQ queue pointer Get the buffer starting address Goto COM99 COM32:

Get the input pointer starting address COM34:

Get next character If character is a space then goto COM34 COM40:

Clear the digit counter If character not equal to 'CR' then goto COM42 Set number of lines to '1' Print prompt Goto COM70 COM42:

If character is not '?'then goto COM41 Save help command Goto COM48 COM41:

Call CHARC to check if alphabetical character If alphabetical character goto COM44 Set error number to zero for syntax error Goto COM70 COM44:

Make sure character is upper case Save character in command Get next character Call CHARC to check if alphabetical character If alphabetical character then goto COM46 Set error number to zero for syntax error Goto COM70 COM46:

Make sure character is upper case Save character in command COM48:

Get next character If character is a space then goto COM48 DATE T[TLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 1 5"/4t' 78 of 189 PLN

COM45:

If character not equal carriage return then goto COM60 COM50:

If command not equal 'AL' for display alarms then goto COM52 Set command number to '2' Goto COM70 COM52:

If command not equal 'DS' for display radiation values then goto COM54 Set command number to '3' Goto COM70 COM54:

If command not equal 'SP' for setpoint display then goto COM56 Set setpoint number to 'OFFH' to display all setpoints Set command number to '4' Goto COM70 COM56:

If command not equal VR' for display program version then goto COM57 Set command number to '5' Goto COM70 COM57:

If command not equal '?'for help command then goto COM58 Set command number to '6' Goto COM70 COM58:

Set error number to zero for syntax error Goto COM70 COM60:

Call VALID to check for digit If a valid digit then goto COM61 COM61:

Save the digit Increment the number of digits Get the next character Call VALID to check for digit If not a valid digit then goto COM62 Save the digit Increment the number of digits COM63:

Get the next character COM62:

If the character is a space then goto COM63 if the character is a carriage return then goto COM64

-- indicate -syntax-error Goto COM70 DATE SOFTWARE DESIGN 9405603 DESCRIPTION, 10(23/02 1 TITLE SYNCOR RADIATION MANAGEMEN oo REV ECN NO. NO. SIZE 2 3076 94 PLN

COM64:

Get ihe command number If command is 'SP' for setpoint display then goto COM65 Indicate syntax error Set error number to zero Goto COM70 COM65:

Get the previous digit If the number of digits is '1' then goto COM66 Multiply the previous digit by '10' Add the current digit to the result of the multiplication COM66:

Save the result as the setpoint number Get the ACIA buffer starting address Get the setpoint table starting address Call ABX to add the contents of accumulator B to the contents of IX If setpoint is not used goto COM69 If setpoint number is greater than the maximum setpoint number then goto COM69 If setpoint number is not equal to the maximum setpoint number then goto COM70 COM68:

If setpoint number is not within the limit then goto COM69 Set command number to '4' Goto COM70 COM69:

Set error number '1' for setpoint out of range Save error number COM70: .-.--

Save command number Get command subroutine table starting address Store the command subroutine address in the ACIA buffer Queue the ACIA buffer address in the IRQ queue for processing command Goto COM99 COM80:

Get ACIA status address If transmit buffer is not empty then goto COM81 Goto COM99 COM81:

Ifthe process flag is not set then goto COM99 Get the character to be output If end of message then goto COM84 Set output pointer to next location

--If not-equal to zero then goto COM82 Increment high byte of output pointer DATE TITLE SOFTWARE DESIGN DESCRIPTION, SNcoR- RADIAIUN *MANGEMENTI -09405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,.'?ýff' 80 of 189 9493SDDPLN

COM82:

Send the character in turn Goto COM99 COM84:

Decrement number of lines in response If number of lines equal to zero then goto COM90 If one line is not left in response then goto COM87 Print the prompt Store the command subroutine address in ACIA buffer COM87:

Set the process flag to prevent transmission until response Disable transmit interrupt Save command register copy Queue the command in IRQ queue Update the queue pointer Goto COM99 COM90:

Clear the number of characters Get pointer to input buffer Goto ABAX Disable transmit interrupt Enable receive interrupt Save the new command register contents Write command to ACIA Point to ACIA buffer Clear transmit flag COM99:

Get ACIA buffer address Save in ACIA buffer Return to caller ECHO: routine to echo received character, character is in accumulator B Get ACIA starting pointer Disable receiver interrupt Enable transmit interrupt Save command register copy Modify ACIA command register Disable transmit interrupt Enable receive interrupt Save the new command register contents Retum to caller VALID: routine to test an input digit Input: Digit-to-be tested is in accumulator.A, Output:_carry-bit clear - valid decimal digit, carry bit set - invalid decimal digit DATE TTLE SOFTWARE DESIGN DESCRIPTION,

-SYNCOR-RADIATION MANAGEMENT 1 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 3 SDD PLN 2 3076 PRODUCTION g*%*'( 81 of 189 9409560

CHARC: routine to test input character Input: Character to be validated is in accumulator A Output: carry bit clear- valid alphabetic character carry bit set - invalid alphabetic character ABX: routine to add the contents of accumulator B to the contents of X Input: value in accumulator B, value in X Output: results are in accumulator A and B contents of accumulator B are unchanged ABAX: routine to add the contents of accumulator B Input: value in accumulator B value in X Output: results are in accumulator A and B contents of X are unchanged COMINI: routine to initialize ACIA and parameter blocks Save ACIA buffer Get the ACIA address Store the ACIA address in the ACIA buffer Get ACIA address Read the data register to clear any interrupts Read the DIP switch Clear out unused bits OR in status register Write to control register Save control register in copy Save in control register copy Set ACIA to receive interrupt Set data terminal ready bit Enable transmit interrupt Get pointer to ACIA buffer Save command register copy Get prompt routine starting address Get ACIA starting address buffer Save subroutine address in buffer Set the process flag Get pointer to IRQ queue Save ACIA buffer address in queue Update queue pointer Save queue pointer

-Get offset to-output buffer Call ABAX- ... . .

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o 32 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION £M4&M 82 of 189 94095603SDD PLN

Save results in output buffer Get input buffer offset Call ABAX Save results in input buffer Return to caller 6.2.9 Com485.s - RS485 Interrupt service functions, the last character is the Linear Predictive Coding (LPC) character Initialize variables COM485:

Save current values on the stack Point the port parameters Access ACIA address Read ACIA status register If receive register is not full then goto XMITINT Read input character Save input character If ACIA status is parity error then goto ERRFLG If ACIA status is overrun error then goto ERRFLG If ACIA status is no error then goto NOERR ERRFLG:

Set error flag Save error flag in input buffer NOERR:

Call DECODE to check if character is valid based on message format XMITINT:

Access ACIA status register If transmit register is empty then goto EXSIT Call GETCHR to get the next character If transmit buffer is not empty then goto XMIT Initialize delay to OFFH While delay is not equal to 0 do begin Decrement delay End while Access ACIA address Reset transmit interrupt request Goto EXSIT XMIT:

Access ACIA status register Output character EXSIT:

Restore variables from the stack Return to caller DATE 1 TITLE SOFTWARE DESIGN DESCRIPTION, SYNcoR RADIATION MANAGEMENT 1o/2/ 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 1 1( 83 of 189 PLN

DECODE: ioutine to check validity of character based on message format Access the input buffer address Read the last character received Get the message state table Goto service routine based on state of operation Call BTXS SHTATO: received character must be 'STX' Access input buffer address If received character is not equal to start of transmission character

('STX') then goto BDMSG Call CLRBUF to clear the input buffer Increment state counter Goto FINI BDMSG:

Set state counter to zero Goto FINI SHTATI: received character must be number of bytes Access input buffer address If received character not equal to 'STX' then goto CHKBYT Set state to '1' Goto FINI CHKBYT:

Update the last character Read the input character, this should be the number of data bytes Clear the sign bit If the number of data bytes is less than minimum number of data bytes then goto FIN If the number of data bytes is greater than maximum number of bytes then goto FIN Save number of data bytes Set state counter to '2' Goto FINI SHTAT2: received character must be channel id Access input buffer address Update last character Read input character Decrement number of data bytes If the number of bytes is greater than zero then goto STAT2A Set state to zero Goto FINI STAT2A:

Save channel id in input buffer Set state to '3' Goto-FINI-DATE 1 TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT ¶ 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,YZI.t 84 of 189 PLN

SHTAT3! received character must be 'CMD' Access input buffer address Update last character Read input character Decrement number of data bytes If number of data bytes is greater than zero then goto OK3 If message is not for this channel then goto NOTMEE Goto ERLEN OK3:

Save CMD in input buffer Set state to '4' FIN:

Goto FINI NOTMEE:

Goto NOTME SHTAT4: received character must be 'SBC' Access input buffer address Update last character Read input character Decrement number of data bytes If number of data bytes is equal to zero then goto STA6 If number of data bytes is greater than zero then goto STA5 If message not for this channel then goto NOTME Goto ERLEN STA6:

Set state to '6' Goto FINI STA5:

Set state to '5V Goto FINI SHTAT5: received character must be data or checksum Access input buffer address Update last character Get the data length Call ATXS DONINC:

Save the data in the input buffer Access the input buffer address Increment the data counter Decrement the number of bytes If the number of bytes is equal to zero then goto STST6 OK5:

Set state to '5' to get more data Goto FINI DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o o2 -9405603 ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE REV 2 3076 PRODUCTION ,1,'am 85 of 189 PLN

STST6:

Set state to '6' Goto FINI SHTAT6:

Access input buffer address If message is not for this channel then goto NOTME If LPC is not correct then goto ERLPC If error status is set then goto CHKER to determine particular error DOHICK: good message received Access the address of message handling routine Goto message handling routine NOTME: message not for this channel Set state to zero Goto FINI CHKER: receiver communication error If overrun error has occurred then goto ER.OVR If parity error then goto ERPAR If framing error then goto ERFRM FINI: partial word received, wait for the rest Access input buffer address Update state counter Return to caller ACKNOW:

Set response to 'ACK' Call STOCHR ACK A:

Call SNDMSG, respond with data Goto EKSREF ERPAR:

Set error to parity error Goto ERRE ER.LPC:

Set error to bad LPC Goto ERR_E EROVR:

Set error to data overrun Goto ERRE ERFRM:

Set error to framing error Goto ERRE ER-LEN:

Set error to bad message length Goto ERRE ERNUM:

Set error to invalid data Goto ERR_E DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. PLN L3076 RELEASED PRODUCTION FOR DOC 9.24'CTRL SHEET 86 of 189 NO.

894095603SDD SIE 0 RN

ERSBC:

Set error to invalid subcommand/function Goto ERRR ERNON:

Set error to invalid command/channel Goto ERR_E ERMOD:

Set error to not in remote ERRE:

Save error code Access output bufferaddress Initialize response buffer Save 'NAK' in output buffer Call STOCHR Get error code Call STOCHR to store error code in output buffer Call SNDMSG to initiate transmission Goto EKSREF SNDMSG: routine to initiate transmission of response Get input buffer address Clear input buffer Get output buffer address Get number of bytes in message Mask in the 10000000B, the preset bit Save the result as number of bytes Add this number to the LPC Call STOCHR to put this LPC in the output buffer Access the output buffer address Indicate character has been processed Decrement the number of bytes, LPC not counted in number of bytes Return to caller EKSREF:

Point to port parameters Enable transmit IRQ's for this ACIA Save in command register Return to caller CLRBUF: routine to clear a communication buffer, Input: address of buffer to be cleared, Output: None Clear error status Set state to zero Set data length to zero Set LPC to zero Set first data byte pointer to zero Set last data byte pointer to zero Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10/3/2 -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,?.¥wf. 87 of 189 PLN

STOCHR: routine to store a character in the output buffer, Input: The character to be stored, Output: the carry bit is set if the buffer is full Access the output buffer address Increment the number of bytes in the message Get the current message length If the current message length is less than the total buffer length then goto L1010 Set the carry bit Goto L1099 L1010:

Increment the current message length Save new length Update the LPC ADDBUF:

Call BTXS to store the character in the output buffer Increment the buffer pointer Clear the carry bit to indicate success L1099:

Return to caller GETCHR: routine to get the next character to transmit, Input: none, Output:

retrieved character and the carry bit is set if the buffer is empty Access the output buffer address If the state is equal to zero then goto NOCHAR If the current buffer size is equal to zero then goto NOCHAR Get the pointer to the next character If the pointer to the end of the buffer is less than or equal to the pointer to the next character then goto L1110 NOCHAR:

Set the carry bit to indicate that the buffer is empty Goto L1199 LI 110:

Get the index to next character to send Call BTXS Get the character Access the output buffer address Increment the character pointer Clear the carry bit to indicate that the characterwas read Ll199:

Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SE 2 3076 PRODUCTION 94:%W 88 of 189 PLN

SETAP: setup routine to initialize the transmit buffer Access output buffer address Clear output buffer Get start of transmission string Store string in output buffer Set data end to '2' Return to caller ATXS: routine add accumulator A to X Save accumulator A on the stack Save accumulator B on the stack Add accumulator A to X Restore accumulator A from stack Restore accumulator B from stack Return to caller BTXS: routine to add accumulator B to X Save accumulator A on the stack Save accumulator B on the stack Add accumulator B to X Restore accumulator A from stack Restore accumulator B from stack Return to caller COMINA: routine for ACIA initialization Access ACIA address Read data register Read baud rate from option board

-Clear out unused bits Set RTS to baud rate and I stop bit for WL 8 Write to control register Set data terminal ready bit and parity mode enabled Write to command register Return to caller COMINB: routine to initialize unused ACIA Access ACIA address Clear IRQ Clear receive status Reset device Return to caller STATBL: decode message state table DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 94095603DD SIZE 2 3076 PRODUCTION 04%'-0 89 of 189 PLN

6.2.10 Common.s - Contains any variable or table that is either used by more than one module or is dependent on the monitor's configuration.

Declare public variables for scalar output states Declare public parameters for average and deadtime routines Declare public detector related pointers Declare public variables for clock updates Declare public variables for scalar counts updated by GETCNT routine Declare public variables for single channel and Americum channel accumulators buffers, channel counts and related tags Declare public status word and status/setpoint change words Declare public set indicator lights, hom and beacon Declare public RS232 communication ACIA buffers Declare public analog voltages Declare public PCB scratchpad area Define variables displayed in response to '?' or 'HE' Define the structure of each queue Stack declarations Initializing queues Define tables used by communication section DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCoR RADIATION MANAGEMENT 1 oJo2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 94095603SDD1 2 3076 PRODUCTION .YV'(( 90 of 189 PLN

6.2.11 Comsub.s S~ivices the command subroutine of the serial communication.

Define temporary buffers IRQSVC:

Get pointer to interrupt queue If no interrupts then goto IRQ99 Get the last entry in the table Dequeue the entry Save ACIA buffer address Execute the command Get the buffer starting address Clear the process flag Get ACIA buffer pointer Get offset to output buffer Call ABAX Save the character to be output Update output buffer index Get ACIA starting pointer Disable receiver interrupt Enable transmit interrupt Save command register copy Get pointer to ACIA buffer Set transmit flag Decrement queue pointer If not top of queue then goto IRQSVC IRQ99:

Return to caller CMDTAB: define command table ERROR - Pointer to error routine PROMPT - Pointer to print prompt routine ALCMD - Pointer to alarm display command routine DSCMD - Pointer to display radiation routine SPCMD - Pointer to display setpoint command routine VRCMD - Pointer to display version command routine HELP - Pointer to display commands routine ESPOINT - Pointer to set setpoint command routine DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYCOR RADIATION MANAGEMENT .013102 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION gaz','( 91 of 189 PLN

HELP: routine to display the available commands Get ACIA buffer starting address If the number of lines equal zero then goto HLP10 Get pointer to the test Save a copy Goto HLP20 HLP10:

Set the number of Ilines to '6' Get the text starting address Save a copy of the pointer HLP20:

Call BLANK to blank the response line Get address of response buffer Save address of response buffer Call COPY to copy the text Get ACIA buffer starting address Save pointer to text Store ETX Get response buffer starting address Set number of characters to be transferred to '80' Call MOVST HLP99:

Return to caller ALCMD: routine to display the values associated with different alarms Get ACIA buffer starting address If the number of lines is not equal to zero then goto ALC20 ALC10:

Set the number of lines to '2' ALC20:

Call BLANK to blank out the response line Print 'HI' for high alarm Save rounding flag Set pointer to high alarm Call FP2DEFB to convert floating point number to ASCII Retrieve the rounding flag Print the units Get the destination address Set the number of characters to be moved to '5' Call COPYN Print 'WA' for warn alarm Set pointer to warn alarm Call FP2DEFB to convert floating point number to ASCII Print the units Get the destination address Set the number of characters to be moved to '5' Call COPYN DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYFNCOR RADIATION MANAGEMENT o -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 9.eMd(t 92 of 189 1 PLN

ALC60:

Get the destination address Put 'ETX' at destination address Set the number of characters to be transferred to '80' Call MOVST ALC90:

Return to caller DSCMD: routine to display the radiation values and status Call BLANK to blank the response line Get ACIA buffer starting address If the number of lines is equal to '2' then goto DSC46 If the number of lines is not equal to zero then goto DSC16 DSC10:

Get ACIA starting address Set number of lines to '3' DSC16:

Set text to 'Radiation:'

Get response address Save buffer pointer Call COPY Get rounding flag Save rounding flag Get the radiation values Call FP2DEFB to convert from floating point to ASCII Get the rounding flag Save the rounding flag Goto DSC22 DSC22: -

Get the text for the units Store units Get the destination address Set the number of characters to be moved to '5' Call COPYN DSC36:

Goto DSC76 DSC46:

Get the text for 'Status' Get the destination address Call COPY DSC50:

Get warn alarm status If status is zero then goto DSC54 DSC51:

Get destination address Print 'WA' for warn alarm DATE TTLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,aY~w 93 of 189 94095603SDD LN

DSC54:

Get high alarm status If status is equal to zero then goto DSC56 DSC55:

Print 'HI' for high alarm DSC56:

If check source status is zero for channel 1 goto DSC58 Get text 'C/S' Get destination address Call COPY DSC58:

If calibration status is equal to zero then goto DSC60 Get text 'Calib' Get destination address Call COPY DSC60:

Get under range/no counts flag If over range bit is zero then goto DSC62 Get under range text Get destination address Call COPY DSC62:

Get over range flag If under range bit is zero then goto DSC64 Get over range text Get destination address Call COPY DSC64:

Get under range/no counts flag OR in over range flag If fail bit is equal to zero then goto DSC76 Get fail text Get destination address Call COPY DSC76:

Get destination address Store 'ETX' Get response buffer starting address Set the number of characters to be transferred to '80' Call MOVST DSC90:

Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SV.E 2 3076 PRODUCTION 04Z&-1 94 of 189 1 PLN

SPCMD: routine to print the number, name and value of each setpoint stored in EEPROM when setpoint is undefined, and to display and possibly change the value if setpoint is defined.

Get ACIA buffer starting address If setpoint number is defined then goto SPC40 If number of lines equal zero then goto SPC02 Get ACIA buffer starting address Get the text pointer Save the text pointer Goto SPC10 SPC02:

Get the setpoint pointers text address Set number of lines to zero SPC04:

Save setpoint text pointer If setpoint is not defined then goto SPC06 Point to the data If setpoint is not initialized then goto SPC06 Increment number of lines SPC06:

Get setpoint text pointer Point to next entry If not end of setpoint table then goto SPC04 Point to ACIA buffer Increment number of lines Save number of lines Clear setpoint number

- Set pointer to setpoint text SPCIO:

If the setpoint is not used then goto SPCB If setpoint is used then goto SPCI1 SPCB:

Set not-used-setpoint flag Goto SPC20 SPC1 1:

Call BLANK to blank the response line Get ACIA buffer starting address Get setpoint number Call BCDDEFB to convert to ASCII digits Iffirst digit is not zero then goto SPC12 Set text to ' '(space)

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT - 1023/02 -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 3 SDD PLN 2 3076 PRODUCTION 9bM 95 of 189 9409560

I SPC12:

Save ASCII digits in response buffer Get setpoint text table pointer Point to setpoint definitions Point to the text Save the text pointer Get the destination address Call COPY Save setpoint text pointer Get pointer to setpoint Point to value Save pointer Get destination address Call FP2DEFB Get pointer to units Get pointer to destination Call COPY Save setpoint text pointer Get destination address Set test to 'ETX' Clear not-used-setpoint flag SPC20:

Set the setpoint text pointer to the next setpoint Get the ACIA buffer starting address Increment the set point number Save setpoint number Set text pointer to the next setpoint If this setpoint is not used then goto SPCIO Get ACIA buffer starting address Save pointer to setpoint text Goto SPC80 SPC40:

Get ACIA buffer starting address Increment setpoint level to indicate modify setpoint Set number lines equal to '1' Save setpoint number SPC45:

Call BLANK to blank the response buffer Get the ACIA buffer starting address Clear the carry bit Get the setpoint number Call BCDDEFB to convert to two ASCII digits If first digit is not equal to zero then goto SPC48 Set first digit equal to (space)

SPC48:

Save the digits in the response buffer DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCORRADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 9SIE 2 3076 PRODUCTION ,Z# 1 96 of 189 PLN

MM1:

Get the ACIA buffer starting address MM2:

Get the setpoint number MM3:

Shift the number left MM4:

Point to the setpoint definition table MM5:

Call ADBX MM6:

Save the entry pointer MM7:

Point to the definition MM8:

Point to the text Set copy source address Set destination address Call COPY Get the setpoint value Set destination address Call FP2DEFB Get the destination address Save 'ETX' at destination address SPC80:

Get response buffer starting address Set number of bytes to be transferred to '80' Call MOVST to copy the buffer SPC99: ---

Return to caller VRCMD: routine to display software part number, version, and date Get the ACIA buffer starting address If the number of lines is equal to zero then goto VRC03 Get pointer to the setpoint text Save pointer Goto VRC05 VRC03:

Set number of lines to '4' Set the starting address of the code to be executed VRC05:

Call BLANK to blank the response line Get the starting address of the code to be executed Goto code DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10-3/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION I1%W1( 97 of 189 PLN

VRC10:

Get the title Get the destination address Call COPY Get the text Get the destination address Set the number of characters to be copied to '14' Call COPYN Prepare to print the next Iline Get pointer to ACIA buffer Save pointer to the text Goto VRC50 VRC20:

Get the part number Get the destination address Call COPY Get the text Get the destination address Set the number of characters to be copied to '8' Call COPYN Prepare to print the next line Get pointer to ACIA buffer Save pointer to the text Goto VRC50 VRC30:

Get the date Get the destination address Call COPY Get destination address Get month version/revision was released Call BCDDEFB to convert to ASCII If first digit is not zero then goto VRC32 Set first digit to (space)

VRC32:

Save the digits Save '/'

Get year version/revision was released Call BCDDEFB to convert to ASCII If first digit is not equal to zero then goto VRC36 Set first digit to' (space)

VRC36:

Save the year DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 123/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION I 94-I( 98 of 189 PLN

VRC50:

Get location in response buffer to store 'ETX' Save 'ETX' Get response buffer starting address Set number of characters to be transferred to '80' Call MOVST VRC99:

Return to caller PROMPT: routine to display prompt Set text to prompt definition Set the number of characters to be transferred to '7' Call MOVST Return to caller ERROR:

Get ACIA buffer starting address Get error code Get error message buffer starting address Goto ABDX Get the number of characters in the message Call MOVST Set number of lines to '1' Return to caller ESPOINT: routine to process setpoint commands Get ACIA buffer starting address Get the setpoint number Save the setpoint number in local buffer Set pointer to input buffer Call ADBX Set the input buffer pointer to buffer starting address Clear the number of digits counter Clear the decimal point location counter Clear the exponent sign ESP03:

Get the pointer to the input buffer Get the character Increment the character pointer Save the pointer If the character is a space then goto EXP03 If the character is not a carriage return then goto ESP04 Set the command to '1' Call ESP80 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o 3/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 2 PRODUCTION E,?¥4 99 of 189 94095603SDD1 PIN

ESP04:

If the character is not a decimal point then goto ESP05 Set decimal point location flag Save decimal location Goto ESP07 ESP05:

Call VALID to check if valid decimal digit If not a valid digit then goto ESP60 Increment the number of digits counter Save the digit Update the digit pointer Increment the decimal point location counter ESP07:

Get the pointer to the input buffer Get the character Update the buffer pointer Call VALID If digit not valid then goto ESP12 Increment the number of digits counter Save the digit Update the digit pointer If the decimal point flag is set then goto ESP10 Increment the decimal point location counter ESPIO:

If the number of digits is less than or equal to '5' then goto ESP07 Goto ESP60 ESP12:

If the number of digits is equal to zero then goto ESP60 If character not equal to decimal point then goto ESP15 If decimal point flag is set then goto ESP60 Set the decimal point flag Goto ESP07 ESP15:

If the character is not a space then goto ESP20 ESP17:

Get the pointer to the input buffer Get the character Update buffer pointer If character is a space then goto ESP17 ESP20:

Make sure character is upper case If character is not equal to 'E' then goto ESP30 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT ....- 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION y'%fW 100 of 189 PLN

ESP25:

Get the pointer to the input buffer Get the character Update the input buffer pointer If the character is a space then goto ESP25 If the character is not a '+' then goto ESP30 Clear the exponent sign flag Goto ESP35 ESP30:

If character is not a '-' then goto ESP37 Increment exponent sign flag ESP35:

Call VALID If not a valid digit then goto ESP60 Save the digit If exponent flag is equl to zero then goto ESP40 Make the exponent negative ESP40:

Save the exponent ESP42:

Get the pointer to the input buffer Get the character Update the input buffer pointer Save the pointer If the character is equal to space then goto ESP42 If the character is not equal to a carriage return then goto ESP60 Get pointer to the number Call ETOFP to convert to a floating point number

-.--.---Get setpoint number -- -

Indicate set function Call DBASUB to enter setpoint into RAM ESP50:

If error occurred in DBASUB then goto ESP70 Set to print prompt on return Goto ESP80 ESP60:

Get ACIA buffer starting address Clear error code to indicate syntax error Goto ESP80 ESP70:

Get ACIA buffer starting address Set error code to '2' for invalid set point ESP80:

Get ACIA buffer address Set the number of lines to '1' Clear the error level DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10/23 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 101 of 189 PLN

ESP90:

Get the ACIA buffer address Save the command number Get the command subroutine table starting address Call ADBX Get the ACIA buffer starting address Save the subroutine address in the buffer Execute the command Return to caller ETOFP: routine to convert E-format numbers to floating point. Input: number to be convert is pointed to by IX, 3 digits followed by exponent.

Output: converted floating point number is pointed to by IX Clear the floating point number buffer Set the power of ten to '1' Get the number to be converted If the decimal point location is equal to the number of input digits then goto EFP10 Get the exponent If the exponent is negative then goto EFP06 EFP03:

Decrement the exponent Increment the decimal location If decimal location is not equal to number of input digits then goto EFP03 Goto EFP07 EFP06:

Decrement the exponent

-- Increment the decimal point location If decimal location not equal to number of input digits then goto EFP06 EFP07:

Save the exponent Save the decimal location EFP10:

Get the exponent Save the exponent If exponent is equal to zero then goto EFP24 If exponent is negative then goto EFP17 EFP12:

While the exponent is not equal to zero do begin Multiply '1 El' by power of ten Set power of ten equal to the result Decrement the exponent End while Goto EFP24 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1 o 3/2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET No. 9SIE 2 3076 PRODUCTION *Ir 102 of 189 PLN

EFP17:

While exponent is not equal to zero do begin Divide '1 El' by power of ten Set power of ten to the result Increment exponent End while EFP24:

Set pointer to least significant digit Decrement the number of input digits Call ADBX Save the digit pointer EFP30:

While number of digits to be transferred is not equal to zero do begin Get the digit Convert digit to floating point Multiply digit by power of ten Add result to value Multiply ' El' by power of ten Set power of ten equal to result Get pointer to the number Decrement pointer Decrement number of digits to be transferred End while Save value Return to caller ADBX: routine to ad contents of accumulator B to contents of X, contents of B are unchanged Save accumulators Save IX Add the contents of accumulator B to the least significant byte of IX Add '0' to the most significant byte of IX Save the result Retrieve the registers Return to caller ABAX: routine to add the contents of accumulator B to the contents of IX, contents of X are unchanged. The result is in accumulator A and B.

Clear accumulator A Store IX Add the contents of accumulator B to the least significant byte of IX Add '0' to the most significant byte of IX Save the results Get the original contents of IX Return to caller SY*o SYCR RAD AIATION MANAGEMENT9450 DATE TITLE SOFTWARE DESIGN DESCRIPTION, REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,4%1 103 of 189 PLN

MOVST: routine to copy a string to the output buffer. The number of bytes to be copied is in accumulator B.

Store characters in local buffer Save the number of bytes in local variable Get the address of the ACIA output buffer Call ADBX Save IX in local buffer Get the number of bytes to be transferred NXTCH:

Get a character Update pointer to character buffer Store character in output buffer Update output buffer pointer If number of characters to be transferred is not equal to zero then goto NXTCH Return to caller BLANK: routine to blank the response buffer Get pointer to response buffer starting address Store line feed in response buffer Update response buffer pointer Store carriage return in response buffer Update response buffer pointer Set counter to '78' Set character to (space)

While counter not equal to zero do begin Store character in response buffer

-... Update response buffer-pointer ---

Decrement counter End while Return to caller COPYN: routine to copy a string, Input: pointer to source, pointer to destination, number of bytes in accumulator B.

Get the source pointer Get the character Update source pointer Get destination pointer Save the character Update the destination pointer Decrement the number of characters If number of characters to be transferred is not equal to zero then goto COPYN Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DO CTRL SHEET NO. SIZE 2 3076 PRODUCTION M1*?4 104 of 189 9 PLN

COPY: routifie to copy text, Input: pointer to sburce buffer and pointer to destination buffer. The source text should be terminated by 'V Get the source buffer pointer Get the character Update the source pointer If the character is equal to 'V then goto COPYEX Get destination buffer pointer Save the character Update destination pointer Goto COPY COPYEX:

Return to caller BCDDEFB: routine to convert BCD byte to two ASCII digits, Input: BCD byte in accumulator A, Output: the two digits are in accumulator A and B with the most significant digit in accumulator A.

Get the most significant digit Add in '30H' to convert to ASCII Mask the most significant digit Add in '30H' to convert to ASCII Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 3102 -9405603

-o REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZ.E 2 3076 PRODUCTION 92ýy'f 105 of 189 PLN

6.2.12 Conf.s - 956A UDR configuration Define ID to be UDR firmware part number Define MONSTAT, the integer display conversion constant Define the OPTBRD, to be UDR956A or COMOPT or DET210 Define display parameters Define 3 sets of factory setpoints SPDF10:

0: Alarm Limit (1E3) 1: Warn Limit (1E3) 2: Resolving Time (0 minutes/count) 3: High Scale Value (1 E3) 4: Over Range Limit (1 E5) 5: Conversion Constant (IEO) 6: Not Used 7: Low Scale Value (.01) 8: Calibrate Time Constant (6E1) 9: Under Range Limit (.01) 10: Not Used 11: Not Used 12: Not Used 13: Not Used 14: Not Used 15: Channel Id SPDF20:

0: Alarm Limit (1E4) 1: Wam Limit (1 E2) 2: Resolving Time (0 minutes/count) 3: High Scale Value (1E4) 4: -Over Range Limit (1 E4) 5: Conversion Constant (1EO) 6: Not Used 7: Low Scale Value (.1) 8: Calibrate Time Constant (6E1) 9: Under Range Limit (.1) 10: Not Used 11: Not Used 12: Not Used 13: Not Used 14: Not Used 15: Channel Id DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1W2312 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 9SZE 2 3076 PRODUCTION *1..94'1 106 of 189 PLN

SPDF30 (Used in 94095603 PROM):

0: Alarm Limit (1 E3) 1: Wam Limit(1El) 2: Resolving Time (0 minutes/count) 3: High Scale Value (1 E4) 4: Over Range Limit (1E4) 5: Conversion Constant (1E-2) 6: Not Used 7: Low Scale Value (1E-1) 8: Calibrate Time Constant (6E1) 9: Under Range Limit (1E-1) 10: Not Used 11: Not Used 12: Not Used 13: Not Used 14: Not Used 15: Channel Id Set up bar graph parameters Bar low value 1 : 0.01MRH Bar high value 1 : 1.OOE+06 Bar low value 2 : .0.01 MRH Bar high value 2 : 1.00E+07 Bar low value 3: 0.01 MRH Bar high value 3 : 1.00E+08 Bar off value: 0 Define SPNTB table to be the pointer table to the setpoint nomenclature SPNO: High Alarm Limit mR./hr SPNI: Warn Alarm Limit mR/hr SPN2: Resolve Time Min/Count SPN3: Full Scale Value mR/hr SPN4: Over Range Limit mR/hr SPN5: Conversion Constant mR/hr/Count SPN6: Background Subtract SPN7: Low Scale Value mR/hr SPN8: Calibrate Time Constant sec SPN9: Under Range Limit mR/hr SPN15: Channel Id DATE 1 TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION *% 1( 107 of 189 PLN

Define SETTAB, setpoints indexed by THINPUT value Function switch position 15 - setpoint address Function switch position 7 - low scale value Function switch position 14- not used Function switch position 6 - background subtract Function switch position 11 - not used Function switch position 3 - high scale value Function switch position 10 - not used Function switch position 2 - resolve time Function switch position 13 - not used Function switch position 5 - conversion constant Function switch position 12 - not used Function switch position 4 - over range limit Function switch position 9 - under range limit Function switch position I -warn alarm limit Function switch position 8 - calibration time constant Function switch position 0 - high alarm limit Define RS-232 VICOLOOP - the specific locations are determined by the PCB include File. A software switch determines the type of communication, ScanRad or Dumb Terminal.

Define setpoint definition table indexed by function switch position Set up setpoint definitions Set up units text for the 'DS' command CPMUNT: 'CPM' selected when units = I MRUNIT: 'mR/h' selected when units = 2 UCUNIT: 'uC/cc' selected when units= 3 Initialize current units to '2' Define ACIA tables -_

Set checksource decay constant to 5 seconds Declare process interrupt vectors DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNcOR RADIATION MANAGEMENT 11 02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION a#Z4k 108 of 189 PLN

6.2.13 Dbasub.s - Setpoint subroutines - This routine is used to read/write setpoints and is reentrant THMSUB:

Set data pointer Set read/write flag Check for valid function code If error condition goto SETERC Get the exponent and save value Get setpoint If not defined goto SETERC If setpoint is not initialized goto SETERC If read setpoint goto READ Else goto SET SET:

Get setpoint number Call SETEDT for validity check If error then goto SETERV REP:

Store setpoint value in table Set modify flag Goto SETNIL READ:

Read setpoint value SETNIL:

Clear carry bit Clear overflow bit Goto DONE SETERV:

Clear carry bit Set V bit to indicate value out of range Goto DONE SETERC:

Clear overflow bit Set C bit to indicate illegal channel/.function DONE:

Save condition codes Set condition code Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10/23/02 - -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,?cV4f. 109 of 189 PLN

6.2.14 Dspsvc.s - UDR display services Initialize variables DSPSVC: this routine drives all the displays If display is not inhibited then goto CHANG1 Goto DONE CHANGI:

Get calibrate status If not in calibrate then goto NOINCL Get calibration counts Goto SETUP NOINCL:

Get switch inputs If not display high voltage then goto HIALRM Point to high voltage value Goto SETUP HIALRM:

If not display high alarm then goto WRNALR Point to high alarm value Goto SETUP WRNALR:

If not display warn alarm then goto RATE1 Point to warn alarm value Goto SETUP RATE1:

If not display rate then goto CKDSP Point to rate value Goto SETUP CKDSP:

Call ERROR to check setpoint validity If no error then goto ARDY Goto DSPERR ARDY:

Get channel range info If channel in over range then goto D1 OPS1 If not in JAM condition then goto DISPI D1OPSI:

Get over range value Save over range value in display output Call DSPDT2 to display value Call BARFUL to light bar to the maximum Goto OUTDSP DISPI:

Get pointer to current value If not integer display then goto SETUP Set digit counter to '4' Point to display data Initialize decimal point at second digit DATE MASOFTWARE TIT2AT0O ELE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 19405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ý 94I 110 of 189 6 0 3 SDD I49PLN

INTLUP:

Get display digit Point to next digit Ifnot decimal point then goto NODPOS Clear bit to display decimal point NODPOS:

Select correct digit Store the data Move decimal point position Decrement digit counter If digit counter is greater than or equal to zero then goto INTLUP Turn on unit's light Save light status Goto DONE SETUP:

Save display unit SETUPI:

Get the value from the table Save the value in local variable Get the next byte Save it Get the third byte Save it Get the last byte Save it for conversion Normalize the floating point number Get the round flag Push accumulator A on stack Increment round flag Convert to hex Pull A off the stack Save A in round flag Get display value Get the units Call DSPDTA to display the data DONE:

Ifnot in calibrate then goto LITTBR Turn lights off Goto OUTDSP LITTBR:

Call STRBAR to turn on bar OUTDSP:

Return to caller DATE TFTLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 13102 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 9SIE 2 3076 PRODUCTION ,.,(Y 111 of 189 9 6 3 SDDPLN

DSPDTA: i'outine to write the display Save the units Set up display control If no error from setpoint entry routine then goto DT1 Set error number Goto DSPERR, process error DT1:

Get floating point to hex result code Get the least significant byte If byte is equal to '2' then goto DSPDT4 If byte is not equal to I then goto DSPDT1 Set error number to 1, negative number Goto DSPERR, process error DSPDT4:

Set error number to.6, number too large to be displayed Goto DSPERR, process error DSPDTI:

Get the exponent If exponent is not blank then goto DSPDT1A Get the value Goto STOREXP DSPTIA:

If exponent is not negative then goto PLUSEXP Set exponent negative Goto STOREXP PLUSEXP:

Set exponent positive STOREXP:

Move the exponent Clear the decimal point Get address of the display DSPDT2:

Point past the sign byte Get the control value Save the control value in the display control OR in the decimal point Write the data Set decimal point to 01 OH If all digits are displayed (display control value equal 0) then goto DSPDT9 Decrement control value Get the value Mask the next reference digit Get the control value OR in the decimal point Save control value in display control value Output the value DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o 31o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 9?.Z' 112 of 189 PLN

Decrement the control value Goto DSPDT2 DSPDT9:

Get the current status of the lights Turn off unit lights Put in new lights Save status of lights Return to caller DSPERR: routine to display error code in accumulator B Output selected error Prepare error code for display Initialize decimal point to 1 OH Initialize control value to '4' Get display value in X Call DSPDT2 to write the value to the display Goto DONE STRBAR: bar graph routine If not in calibrate mode then goto NOINC3 Get calibrate value Save it in bar graph value Goto ANOTH NOINC3:

Get current bar graph parameter Save it in bar graph value ANOTH:

Get break point value If bar graph value is less than breakpoint then goto FNDLO If bar graph value is equal to breakpoint then goto FNDEQ If the last value then goto FNDEQ Point to next reference entry Get next reference breakpoint table entry Get color code entry Save address of next color code entry Goto ANOTH FNDLO:

X now points to breakpoint just higher than the current value Average breakpoint and next lower breakpoint If bar graph value is less than the average then goto FNDEQ and use lower breakpoint Else use the higher breakpoint DATE TITLE SOFTWARE DESIGN DESCRIPTION,

-SYNCOR RADIATION MANAGEMENT 1o 3102 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION £ 1Y(( 113 of 189 PLN

FNDEQ:

X now points to the desired table entry Get first light group code Get second code Get third code If high alarm in state I or2 then goto RED If warn alarm not in state I or2 then goto GREEN Goto AMBER AMBER:

Call GON Call RON Goto BARDON GREEN:

Call ROFF Call GON Goto BARDON RED:

Call GOFF Call RON BARDON:

Return to caller GON: routine to turn lights green Get bar register I value Save it in green register I Get bar register 2 value Save it in green register 2 Get bar register 3 value Save it in green register 3 Return to caller GOFF: routine to turn green off Set green register I to OFFH Set green register 2 to OFFH Set green register 3 to OFFH Return to caller RON: routine to turn red on Get bar register 1 value Save it in red register I Get bar register 2 value Save it in red register 2 Get bar register 3 value Save it in red register 3 Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT*c 3Io2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. S ME 2 3076 PRODUCTION I ,,&'( 114 of 189 PLN

ROFF: routihe to turn red off Set red register I to OFFH Set red register 2 to OFFH Set red register 3 to OFFH Return to caller BARFUL:routine to turn all bars red Get code table for all bars Save first code in bar register I Save second code in bar register 2 Save third code in bar register 3 Call RED Return to caller DSPINI: initialization routine Initialize variable to '2.0' Determine detector Get starting address of the pointers table Call ATOX Save bar graph starting value for this detector Save bar graph ending value for this detector Get the color code table Get number of bars lit on low value If none then goto COLDON COLLUP:

Offset by 3 for each entry Decrement the number of bars If number of bars is not equal to zero then goto COLLUP COLDON: .

Increment offset by 3 to point to I just after Save address of first light code Get address of table begin BRILUP:

Save the limit Compare the table entry to the low limit If table entry is greater than or equal to low limit then goto GOTLO Point to next entry Goto BRILUP GOTLO:

Point to next entry in table, which is the first entry to use Save in first entry variable HIILUP:

Compare table entry to the high limit If table entry is greater than or equal to the high limit then goto GOTHI Point to next entry in table Goto HIILUP DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION *I.(f 115 of 189 PLN

GOTHI:

Save address of last value Set first color to green Goto DONE BARPAR:

Define C1 MPH, the pointer to displayed value TABBEG:

Define breakpoint table TABEND: end of breakpoint table COLTAB:

Define color code table ALLON:

Define all bars on COLEND: end of color table DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10/3/ 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,4f1' 116 of 189 1 PLN

6.2.15 Eesvc.s - EEPROM update routine Initialize variables EESVC:

While not end of setpoint table do begin Get setpoint If setpoint not modified then goto ENT2 Make a copy of the new setpoint Call ERSET to erase location to be written into Call WRSET to write into EEPROM ENT2:

Update table pointer Increment setpoint number End while Return to caller RDSET:

Get address of E2 Call READ to read first two words Return to caller READ:

Call COMMAND Call CLK to clock in next bit Initialize byte count to 2 While byte count is greater than zero do begin Initialize bit count to 8 While bit count is greater than zero do begin Get the bit Clock in next bit by calling CLK Decrement bit count End while loop on bit count Decrement byte count Clock in next bit by calling CLK End while loop on byte count Return to caller WRSET:

Get the E2 address Call WRITE to write the first word Call WI OM to wait 10 msec.

Get address of nex word Call WRITE to write the second word Call WIOM to wait 10 msec.

Retumr o caller---

DATE TITLE SOFTWARE DESIGN DESCRIPTION, ADIATION MANAGEMENT I 3,,12 9405603 I

10. RELEASED FOR DOC CTRL SHEET NO. SIZE I PRODUCTION 9411W 117 of 189 PLN M

WRITE:

Call COMMAND Initialize byte count to 2 While byte count is greater than zero do begin Initialize bit count to 8 While bit count is greater than zero do begin Get the bit Clock in next bit by calling CLK Decrement bit count End while loop on bit count Decrement byte count Clock in next bit by calling CLK End while loop on byte count Return to caller EWEN: Sets up EEPROM Initializes address to 30H Call COMMAND Set the bit Call CLK to clock in next bit Returns to caller EWDS:

Initialize address to O0H Call COMMAND Set the bit Call CLK to clock in next bit Return to caller ERSET:

Get the E2 address Call ERASE to erase the first word Call W1OM to wait 10 msec Increment the address Call ERASE to erase the second word Call WlOM to wait 10 msec Return to caller ERASE:

Call COMMAND Set bit Call CLK to clock next bit Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 6 0 3 SDD PLN 2 3076 PRODUCTION *.?,Y.'(f 118 of 189

ERAL: erases all setpoints Call COMMAND Set bit Call CLK to clock next bit Return to caller WRAL: write to all registers Initialize address to 1OH Call COMMAND Initialize byte count to 2 While byte count is greater than zero do begin Initialize bit count to 8 While bit count is greater than zero do begin Get the bit Clock in next bit by calling CLK Decrement bit count End while loop on bit count Decrement byte count Clock in next bit by calling CLK End while loop on byte count Return to caller COMMAND: send command the the E2PROM Input B contains the command start bit plus opcode Input address contains the byte address Initialize bit count to 4 for 4-bit opcode Enable the chip Set the bit While bit count is greater than zero do begin Get the next bit Call CLK to clock in bit Decrement bit count End while Initialize bit count to 6 for 6-bit address Get the address While bit count is greater than zero do begin Send the next bit Call CLK to clock the bit Decrement bit count End while Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATIO? 1MANAGEMENT 1o/3' 9405603 REV ECN NO. -ASED FOR DOC CTRL SHEET NO. 9 SIZE 2 3076 )DUCTION ElY.&d 119 of 189 1 PLN

CLK: Clocks data bit Bring CE high Bring CE low Return to caller W1OM: wait for 10 msec Initialize counter to 995 While counter greater than zero do begin Decrement counter End while Return to caller ENTIN: initialize setpoints Call EWEN to set up EEPROM Get data entry buttons Save only enter bit Set init flag If not defaulting EEPROM goto EN1 Call ERAL to erase all setpoints Call W1OM to wait for 10 msec ENI:

Get top of setpoint table Initialize setpoint number to zero While not end of setpoint table do begin Save table pointer Get setpoint definition If setpoint is unused goto EN4 If storing default setpoint goto EN3 Get default value Call WRSET to erase the location to be written into EN3:

Get setpoint number Call RDSET to copy data from EEPROM to RAM EN4:

Get table pointer Point to next entry Increase setpoint number End while Set loop address for COM422 Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 94095603SDD1 SIZE 2 3076 PRODUCTION 9ZY,(' 120 of 189 PLN

6.2.16 Entsvc.s - Services data entry buttons Initialize variables ENTSVC:

Get function switch position Call ATOX Set switch position Get the previous status Save previous status Read data entry register Determine which buttons were pushed - buttons are low true If bit was entered then goto ENTBUT If value was selected then goto SELBUT If digit was selected then goto DIGBUT RET:

If not enter mode then goto EDTX Get quarter second timer If timer not expired then goto EDT1 Move the value to work area Blank the digit Clear the units Point to modified data Call DSPDTA to display the data Goto EDTX EDTI:

Clear units indicator Point to display data Goto DSPDTA to display data EDTX:

Return to caller FUNSW: Function switch decode table ENTBUT: enter button routine If not already in enter mode then goto ENT1 Increment enter mode flag Get switch position Point to setpoint table Indicate read function Call DBASUB to read setpoint If setpoint is defined goto ISBDEF Indicate error Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 2 -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 94?1W(" 121 of 189 PLN

ISBDEF:

Round up value Convert value to display format If no error occurred then goto ENTA Set to error value ENTA:

Point to digit parameters Initialize digit table pointer Set up blank digit mask Get current position If positon is not to be calibrated then goto NOICP Set calibrate status to 1 NOICP:

Return to caller ENTI: routine to enter new setpoint If setpoint is undefined then goto ERROR7 Convert setpoiint to floating point value Put in setpoint table Set function code to switch position If not last function then goto SETCID Indicate write function Call DBASUB to store setpoint in RAM and EEPROM If not calibration mode then goto NINC6 Update calibration status NINC6:

Reset the enter flag Reset the error flag Return to caller SETCID: routine to store new loop address Iftwo digits goto SC2 Set exponent to 41 H for one digit Store the exponent Store the mantissa Right justify the mantissa Store integer loop address Set the modify flag Goto NINC6 SC2:

Store integer loop address Set exponent to 42H for two digits Store exponent Store mantissa Set modify flag Goto NINC6 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCORRADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 4SZE 2 3076 PRODUCTION ,',. 122 of 189 PLN

DIGBUT: rouJtine to select next digit to edit Get digit table pointer Point to next entry Get blank mask Store new table pointer Goto RET SELBUT: routine to roll selected digit Get digital table pointer Point to roll routine If invalid address then goto RET RDI:

Get left and right digits Increment left digit If in range then goto RD1A Sub zero first RD1A:

Combine left and right digits Update display data Return to caller (RTS)

RD2:

Get left and right digits Increment right digit If in range then goto RD2A Sub low value RD2A:

Combine left and right digits Update display data Return to caller (RTS)

RD3:

Get left and right digits Increment left digit If in range then goto RD3A Sub zero first RD3A:

Combine left and right digits Update display data Return to caller (RTS)

DATE TFTLE SOFTWARE DESIGN DESCRIPTION, SYNCOR-RADIATION MANAGEMENT Io'20 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET No. SIZE 2 3076 PRODUCTI ON E*%F(t' 123 of 189 94095603SDD 1 PLNrI~

RD4:

Get left and right digits Increment right digit If in range then goto RD4A Sub low value RD4A:

Combine left and right digits Update display data Return to caller (RTS)

RD5: (exponent)

Get left and right digits Increment left digit If equal to +0 then goto RD5A Set to +0 RD5A:

Combine left and right digits Update display data Return to caller (RTS)

RD6:

Get left and right digits Increment right digit If in range then goto RD4A Sub low value RD4A:

Combine left and right digits Update display data Return to caller (RTS)

BLANK:

Get blank mask Point to display data While not last digit pair do begin If left digit selected then begin Blank left digit Place digit in data End if If right digit selected then begin Blank right digit Modify display data End if End while Return to caller (RTS)

DP: digital table declaration DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o23/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 6 3 SDDLN P 2 3076 PRODUCTION ,.&Y 1 124 of 189

6.2.17 Error.s - Error routine ERROR:

If over range is less than under range then goto ERRV1 If over range is less than warn then goto ERRVI If over range is less than high alarm then goto ERRV2 ERRVI:

Set error to invalid setpoint error code Goto ERRV3 ERRV2:

If not analog error goto ERRV3 Set error to analog error code ERRV3:

Return to caller "SOFTWARE DESIGN DESCRIPTION, SyNcOR RADIATION MANAGEMENT 9405603 REV ECN NO. SIZE 2 3076 94095603SDD PLN

6.2.18 Host485.s - Message reply routine Initialize variabls HOST485:

Get pointer to port parameters Get pointer to output buffer address Call SETAP to initialize output buffer Get pointer to input buffer Get command value from input buffer Save command in local variable Get subcommand value Save subcommand value in local variable If command not equal 'IOH' then goto NOTSTAT If subcommand not equal '40H' then goto NOTSTAT Goto CURSTAT, it is the current status command NOTSTAT:

If command not equal zero then goto CMDERR If subcommand is less than 'OH' then goto SBCERR If subcommand is less than or equal to 'OFH' then goto REQSTSP If subcommand is less than '1 OH' then goto SBCERR If subcommand is greater than '1 FH' then goto OTHERCMD Goto SETSTSP OTHERCMD:

If subcommand not equal to '22H' then goto CHKSOFF Goto CKSON, to execute checksource on routine CHKSOFF:

If subcommand not equal to '32H' then goto ALARMACK Goto CKSOFF to execute checksource off routine ALARMACK:

Ifsubcommand not equal to '43H' then goto CURSTAT Goto ACK to execute alarm acknowledge routine CURSTAT:

If subcommand not equal to '40H' then goto CURRVAL Goto CURSTA to execute current status command CURRVAL:

If subcommand not equal to '41 H' then goto ERRMSG Goto CHVAL to execute current value command ERRMSG:

Goto SBCERR EXIT:

Return to interrupt service routine DTAERR:

Get pointer to invalid data error Goto EXIT SBCERR:

Get pointer to invalid subcommand or function error Goto EXIT DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1023/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION OZ%*ff( 126 of 189 PLN

CMDERR:

Get pointer to invalid command or channel error Goto EXIT ACKA:

Get pointer to acknowledge processor respond with data return point Goto EXIT ACKN:

Get pointer to acknowledge processor respond with 'ack' return point Goto EXIT REQSTSP: routine read the specific setpoint value and moves the value to output buffer Get pointer to setpont definition table Call ATOX Point to the setpoint If the setpoint value is equal to zero then goto SBCERR Get pointer to port parameters Get pointer to output buffer Call STORE Goto ACKA STORE:

For all four parts of the setpoint value do begin Save setpoint value in local variable Call STOCHR End for Return to caller SETSTSP: routine to set specific setpoint to the value specified by the data Get pointer to port parameters Get pointer to input buffer Get data offset Call STOX Get setpoint number from subcommand Get setpoint value Set carry to indicate write setpoint Call DBASUB to write setpoint If carry bit is set then goto SBCERR If overflow bit is set then goto DTAERR Goto ACKN, successful completion of a command CKSON: enables checksource Turn on the checksource flag Update remote control commands status CKSONX:

Goto ACKN DATE TrITE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE REV 2 3076 PRODUCTION BRY.'41 127 of 189 PLN

CKSOFF: disables checksource Turn off checksource flag Update iemote control commands status CKSOFX:

Goto ACKN ACK: acknowledge alarms routine If high or warn alarm has been acknowledged then goto NOUNACK If acknowledge counter is greater than or equal to '1' then goto NOUNACK Increment acknowledge counter Turn on alarm acknowledge flag Save remote control commands Release the rate relay NOUNACK:

Goto ACKN CURSTA: this command retrieves the status Get pointer to ACIA port parameters Get pointer to output buffer Get the high alarm status, lower high of byte #0 Call STOCHR to store BYTE #0 in the output buffer Get checksource status Shift checksource bit left 6 times for compatibility with U942 OR in the warn status bit Call STOCHR to store byte #1 into output buffer Get under range/no counts fail flag Shift it left 4 times, this will be upper half of byte #2 OR in the over range/jam fail flag for the lower half of byte #2 Call STOCHR to store byte #2 in the output buffer Clear accumulator A Call STOCHR to store '0' in byte #3 Call STOCHR to store '0' in byte #4 Call STOCHR to store '0' in byte #5 Call STOCHR to store '0' in byte #6 Call STOCHR to store '0' in byte #7 Call STOCHR to store '0' in byte #8 Goto ACKA DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT /2 9405603

-t REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 6 0 3 SD PLN 2 3076 PRODUCTION *I.K 128 of 189 90

CHVAL: this command retrieves the current one minute average value Access the minute queue structure pointers Set the first pointer to top pointer minus 5 Set the last pointer to the bottom pointer Set pointer to the current pointer minus 5 Iffirst pointer is not equal to pointer then goto NOTLIMIT Set pointer equal to last pointer NOTLIMIT:

Transfer the contents of pointer to temp variable If background subtract option is present then goto BKGSUB Store temp as MPH Goto POSVAL BKGSUB:

Subtract the background If the result is greater than zero then goto POSVAL Set first byte of temp960 to '4000H' Set second byte of temp960 to '0' Goto FLPCNVRT to convert the hex value to floating point POSVAL:

Get the monitor status If the conversion constant is present then goto CNVCONST Save temp in temp960 Goto FLPCNVRT, to convert the hex value to floating point CNVCONST:

Multiply in the conversion constant Result is 4 bytes of hex data Get first byte of result Call STOCHR Get second byte of result Call STOCHR Get third byte of result Call STOCHR Get fourth byte of result Clear lower nibble so that the quality tag is clean Get the checksource status If checksource is off then goto NOQ Load accumulator A with '02H' Goto STORED4 NOQ:

Get the tag Isolate the tag If tag is no data ('07H') then goto STORED4 Clear the tag STORED4:

OR the third byte with accumulator A Call STOCHR DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10/3/29405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 94095603SDD 2 3076 PRODUCTION ,1'1 129 of 189 PLN

FLPCNVRT: converted hex value to floating point in version A. Revision B leavei the data in hex.

Goto ACKA DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o2o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ?iZ.'( 130 of 189 PLN

6.2.19 ldspsvc.s - Integer display conversion routine Initialize variables INTDSP:

If display option is not present then return to caller INOPR:

Get current value If in under range goto INRNG1 Else goto DSPZRO INRNGI:

If in over range goto INRNG2 Else goto DSPOVR INRNG2:

If in JAM condition goto INRN22 Else goto DSPOVR INRN22:

Set flag to display in mR/hr If number is greater than 99.9 goto RNGIST Set flag to display in R/hr Convert number to R/hr If number is greater than 99.9 goto RNGIST Set flag to display in kR/hr Convert number to kR/hr RNGIST:

Set flag to round number Convert number to BCD Get sign of exponent Save a copy Isolate the sign Isolate the exponent digit If sign is negative goto NEGSIN Get first digit If not digit the goto GOTSIN Decrement index by one Goto GOTSIN NEGSIN:

Get exponent GNLUP:

Decrement exponent If equal to zero goto GOTSIN Store a zero Increment index by one Goto GNLUP DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT i 3m2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,%',(( 131 of 189 94096603SDD PLN

GOTSIN:

Get 1 st ahd 2d digits Save 1 t digit Save 2nd digit Get 3rd digit Save 3rd digit STOVAL:

Store integer display value Store integer display units Return to caller DSPZPRO:

Set number value to zero Goto STOVAL DSPOVR:

Set all digits to E Goto STOVAL INTINI:

Get monitor option byte If integer display option then goto PINTOP Set flag to option not present PINTOP:

Blank the first digit Store value of zero Blank the last digit Initialize floating point variable for 1000 to 1000.0 Set display flag to display in mR/hr Set old CMPH to 0 Filter at 1.0 Initialize floating point variable for 99p9 to 99.9 Return to caller DATE TiTLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1 9405603 ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE REV 2 3076 PRODUCTION ,g%"(( 132 of 189 PLN

6.2.20 Inthnd.s - Interrupt handler INTHND:

Get pointer to ACIA table address INT2:

While not end of ACIA table do begin Get the address of ACIA pointed to If address is zero then goto NOINT Get the contents of the status register If this did not cause an interrupt then goto NOINT Get ACIA buffer If no SCANRAD then goto NOTSRCOM Set pointer to the active PCB NOTSRCOM:

Get the subroutine address Service the ACIA in turn NOINT:

Get the next location in the ACIA table End while Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 911,X- 133 of 189 PLN

6.2.21 Libra.s- routines to support standard RS232 communications. These routines are not to be used by interrupt driven functions such as: NMI, COMSVC, THMSUB or SWISVC.

Define variables LIBRA: subroutine jump table AVERAG:

Goto AVGQ, to average queue FSPQ:

Goto FSP, to forward space pointer LOCATE:

Goto LOCQ, to find queue value INITQ:

Goto INIQ, to initialize queue CLEARQ:

Goto CLRQ, to clear queue BKSPQ:

Goto BKSP, to backspace queue SRCHQ:

Goto SEARCH, to search queue DEADT:

Goto DEAD, to do deadtime calculation SQRT:

Goto RADX, to calculate square root CLEAR:

Goto CLRMEM, to clear memory block ATOX:-foutine to-add vaiue in accumulator Ato X, accumulator value is preserved.

Save value from accumulator A in local variable Save value from accumulator B in local variable ACCOM:

Get high order of X in accumulator B Add accumulator A to low order of X Add carry to high order Save high order Save low order Put result in X Restore accumulator A Restore accumulator B Return to caller AX2TOX: adds 2 times value in accumulator A to X Save accumulator A in local variable Save accumulator B in local variable Multiple accumulator A by 2 Goto ACCOM DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o 3/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET No. SIZE 2 3076 PRODUCTION 7,.f5k(1 134 of 189 PLN

AX4TOX: adds 4 times value in accumulator A to X Save acdumulatorA in local variable Save accumulator B in local variable Multiple accumulator A by 4 Goto ACCOM BTOX: routine to add value in accumulator B to X, accumulator value is preserved.

Save accumulator B in local variable Save accumulator A in local variable BCCOM:

Get high order of X in accumulator A Add accumulator B to low order of X Add carry to high order Save high order Save low order Put result in X Restore accumulator B Restore accumulator A Return to caller BX2TOX: adds 2 times value in accumulator A to X Save accumulator B in local variable Save accumulator A in local variable Multiple accumulator B by 2 Goto BCCOM BX4TOX: adds 4 times value in accumulator A to X Save accumulator B in local variable Save accumulator A in local variable Multiple accumulator B by 4 Goto BCCOM CLRMEM: routine to clear memory block. Input: index register X contains starting address, accumulator A contains length (1-128). Output: Memory block cleared to zero, accumulator A, accumulator B and index register X are wiped out.

While length is not equal to 0 do begin ClearX Increment X Decrement length End while Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION , 135 of 189 9 PLN

SETUP: routine to setup queue pointer locations. Input: index register X points to queue header Save X in local variable Get queue header Set FIRST equal to queue header Set LAST equal to queue header plus 2 Set PTR (queue write pointer) equal to queue header plus 4 Set TOTAL (queue total) equal to queue header plus 6 Return to caller NODATA: defines value for no data as double word '04000H', 'OH' INIQ: routine initialize queue, index register X points to queue descriptor Save the descriptor address in POINTI (prototype header)

Get queue header address Save it in POINT2 (queue header in RAM)

Move prototype header to queue header in RAM CLRQ: set all values to no data Save POINT1 on the stack Save POINT2 on the stack Save queue header address Get pointer to first element Save it Get pointer to last element Save it Start with last element While not first element do begin Set element to zero Set tag to NODATA Decrement element pointer End while Pull POINTER1 off of stack Pull POINTER2 off of stack Return to caller AVGQ: update historical section. Inputs: index registerX points to buffer header, QVAL is tagged section.

Output: queue total computed and QAVG (average value)

Buffer format: (0) Top Pointer, (2) Bottom Pointer, (4) Oldest Value, (6) Total. The new value replaces the oldest value.

Call SETUP to set up the queue pointers Point to the oldest value Replace it with the new-value SReplacelthe-tag Call FSPA to bump queue pointer DATE TiTLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION

• 136 of 189 94095603SDD PLN

Clear the counter Point to the first value Get the value If value is not equal to zero then goto AVG1 Increment counter AVG1:

Point to last element AVG2:

Get the value Add the two values together Save the result If value is not equal to zero then goto AVG3 Increment counter AVG3:

Backspace the value pointer If value pointer not equal to first value then goto AVG2 AVG4:

Get pointer to queue total Rewrite it to local variable Get counter Update counter Initialize QAVG to NODATA Get good value count If counter equals zero then goto AVGX Clear temporary variable used to float counter Float the counter Divide the total value by the counter AVGX:

- Return to-counter LOCQ: calculate address of section circular buffer. Input: accumulator A contains the index, index register X points to buffer header. Output:

index registerX points to the result Call SETUP LOCQA:

Save the index Calculate index times 5 Save result in TEMP Get queue write pointer Get pointer to first element Subtract first element pointer from queue write pointer Save result in TEMPI If TEMPI exponent is equal to TEMP exponent then goto LOC2 If TEMPI exponent is greater than TEMP exponent then goto LOCI If TEMPI mantissa is less than TEMP mantissa then goto LOC2 DATE 0 TLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT ¶c o2 -9405603 DOC CTRL SHEET NO. SIZE REV ECN NO. RELEASED FOR 0YVf 137 of 189 94095603SDD PLN 2 73076 PRODUCTION

LOCI:

Subtract TEMP from TEMPI Save result in TEMPI Goto LOC3 LOC2:

Subtract TEMPI from TEMP Save result in TEMP Subtract TEMP from last element Save result in TEMPI LOC3:

Save TEMPI in index register X Restore accumulator A Retum to caller SEARCH: searches queue from current value back until value is equal to QVAL. Input: QVAL. Output: index of value relative to newest value is in accumulator A.

Call SETUP Clear counter Get search argument Save it If it is equal to zero then goto SRCH3 Call BKSPA to point to nearest value Call BKSPA to point to previous value Set counter to 'T' SRCHI:

If the current value is equal to zero then goto SRCH3 Call COMPAR.

If the argument value and current value are equal then goto SRCH2 Get pointer to header Get current pointer If the pointers are the same then goto SRCH3 Increment the counter Call BKSPA to point to nearest value Goto SRCH1 SRCH2:

Get the count in accumulator A Clear the carry bit to indicate success Return to caller SRCH3:

Get the count in accumulator A Set the carry bit to indicate not found Retum to caller DATE TrITE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10/23/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 94095603SDD1 2 3076 PRODUCTION ,=ff 138 of 189 PLN

BKSP: routine to backspace circular buffer pointer Call SETUP to get queue pointers BKSPA:

Get current pointer If current pointer is equal to first pointer then goto BKSP1 Update current pointer to point to previous element Goto BKSPX BKSPI:

Set current pointer to last element BKSPX:

Save current pointer in index register X Return to caller FSP:

Call SETUP to setup queue pointers FSPA:

Get current pointer If current pointer is not equal to last pointer then goto FSPI Set current pointer to first pointer Goto FSP2 FSPI:

Update the current to point to next element FSP2:

Get pointer to the queue header Get current pointer Rewrite the slot pointer Save new current pointer in index register X Return to caller COMPAR: compare two floating point numbers, positive exponents is assumed.

If first byte of float I is not equal to first byte of float 2 then goto COMPX If second byte of float I is not equal to second byte of float 2 then goto COMPX If third byte of float I is not equal to third byte of float 2 then goto COMPX If fourth byte of float I is not equal to fourth byte of float 2 then goto COMPX COMPX:

Return to caller, carry set indicates numbers are equal DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION .'.'t 139 of 189 PLN

DEAD: routine to compute dead time correction factor, Input: index register X contains pointer to setpoints in RAM.

Save RAM pointer Set up variable equal to floating point '1' Get RAM pointer Multiply counts per minute value by resolve time in minutes per count Subtract result of multiply from floating '1' Dead time correction factor is equal to floating '1' divided by result of subtraction If division result is not negative then goto NONEGC Set dead time correction factor to '0' NONEGC:

Restore index register X Return to caller RADX: routine to calculate the square root of a floating point number in excess 64 notation Initialize variable to floating point '2' Save input number Get the exponent Get first two hex digits Keep the first digit Get pointer to square root table Compute mantissa times '4' Call ATOX to find root in the table Save square root of mantissa Get exponent in accumulator A Set the carry bit Subtracting '039H' and carry from accumulator A Convert to table index Get pointer to table Call ATOX to find root Save square root of exponent Multiply square root of exponent by square root of mantissa Save result in SQRTX Set iterations to '4' SQRLUP:

Divide the input number by SQRTX Move original SQRTX to work area Clear least significant nibble Move result of divide to work area

-Clear least significant nibble If SQRTX is equal to result of divide then goto FOUND Decrement iterations DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 94095603SDD1 2 3076 PRODUCTION 0Y-.'( 140 of 189 PLN

If iterations is equal to zero goto FOUND NOFND:

Add SQRTX to result of the divide Set SQRTX to result of addition Call SHIFT to divide by two Goto SQRLUP FOUND:

Set index register X to address of SQRTX work area Return to caller SHIFT: routine shifts one bit, normalizing if necessary Save accumulator A on stack Save accumulator B on stack Get address of SQRTX work area If exponent is not zero then goto NOZ If mantissa is not zero then goto NOZ If equal to zero then goto OUTTA NOZ:

Shift the first byte of the manissa to the right Save the carry flag in accumulator A Mask out bottom nibble If not equal to zero then goto GOON Decrement the exponent Restore the first byte of the mantissa Initialize counter to '3' TAKOFF:

Shift the bottom byte left Shift the next byte with the carry left Shift the next byte left Decrement the counter If counter is not equal to zero then goto TAKOFF Goto OUTTA GO ON:

"Bring back th carry Shift one bit to the right Shift one bit to the right OUTTA:

Restore the stack DONE:

Return to caller SR: defines the square root table for X = 0 to 16 SR16: defines the square roots of the powers of 16 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT io o2 9405603 ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE REV 94095603SDD PL 2 3076 PRODUCTION %i 141 of 189 PLN

FP2DEFB: routine to convert floating point number to ASCII Input: F2HDR contains the address of floating point number to convert index register X contains address of buffer to store conversion. Output: Buffer is loaded with converted number, if number is illegal (a negative number), all zeros are stored. Buffer pointer is pointing to next space in buffer. Buffer format 100+1 1.OOE+01. Buffer format 123-4 = 1.23E-04 Save buffer address Get input floating point number address Make a copy of the floating point number Get flag to round result Put rounding flag on the stack Increment rounding flag Get buffer address Call FP2HEX to convet to BCD characters Restore old rounding flag Get the BCD sign If sign is not equal to 0 then goto F2AERR Get first digit Isolate the first digit Make it ASCII Save it in buffer Adjust the decimal point Print the decimal point Save it in the buffer Adjust the buffer pointer Get the second digit Isolate it Make it ASCII Save it in the buffer Update the buffer pointer Get the third digit Isolate it Make it ASCII Save it in the buffer Print space Save it in the buffer Update buffer pointer Print 'E' Save it in the buffer Update buffer pointer Get sign, first exponent digit Isolate-it DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION .04'/V( 142 of 189 PLN

If it equals 'OOH' then goto F2AERR If it equals '08H' then goto F2AERR If it does not equal '07H' then goto F2ANNO Store a minus sign in accumulator A for negative exponent Goto F2AOV1 F2AN NO:

Store a space in accumulator A for positive exponent F2AOV1:

Save sign in the buffer Update buffer pointer Get second exponent digit Isolate it Make it ASCII Save it Update buffer pointer Goto F2AXREF F2AERR:

Store '000+0' in buffer to indicate error condition Update buffer pointer F2AXREF:

Return to caller EXPON: routine to calculate the exponent of an argument Set FPI equal to '1.0' Set FPO_2 equal to '0.2' Initialize result YVAL equal to FP1 Initialize intermediate result TVAL equal to FP1 EXPI:

Initialize L to '0' Initialize L+2 to '1' Initialize 1200H to '1202H' EXP3:

Convert L to floating point Save in N (counter)

Mulitply TVAL by input value and store in RVAL Divide RVAL by N and store in TVAL Get pointer to 1200H Copy RVAL to pointed at location Update pointer Copy TVAL to pointed at location Update pointer Save pointer If TVAL is less than FPO_2 then goto EXP7

_AddY-ALto-TVAL and save in YVAL Increment count Goto EXP3 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT I23/o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,6Y.Z/( 143 of 189 2DPLN

6.2.22 Nmi8.s - 8 Hz hon-maskable interrupt service r6utine. This interrupt is connected to a clock which ticks 4 times per second. Various time dependent actions are performed: 1) gets counts from all routines that count and adds the count to the sum in RAM, which is looked at and cleared whenever the filter routine is run. This happens typically every second. 2) activates the clock function by putting a value in the run flag.

Initialize variables NMI:

Get backup flag to see if initialization is complete If initialization is complete then goto NMI1 Goto NMI99 Get the scalar address Call GETSC to get the counts If High Voltage then goto NMI30 Load the scalar counts per second Goto NM134 NMI30:

Get the High Voltage counts per second NM134:

Store the counts per second Call ADDSUM to add current counts to running total Call STRSM to save the counts on the 7 th tick Call TICKER to schedule task as required NMI99:

Set run flag to execute setpoint edit routine and RS232 communication command routines Return to caller GETSC: routine to get counts Disable counting Read the count Clear the counter Reset clear bit Restore select bit Enable counting Return to caller ADDSUM: routine to total counts Value to be added is stored in TEMP The address of the sum is pointed to by X Add current count to sum Result is returned in X Return to caller STRSM: routine to store the counts on the 7th tick Get ticks If ticks are less than 7 then goto PAST DATE TITLE SOFTWARE DESIGN DESCRIPTION,

-SYNcOR RADIATION MANAGEMENT I o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION , 144 of 189 PLN

Store the count PAST:

Return to caller TICKER: routine to schedule tasks Get the ticks Increment ticks by one If ticks are not equal to 8 then goto TICKX Reset tick counter Set run flag TICKX:

Return to caller 6.2.23 Setedt.s - Setpoint validity check routine Define the lower limit for conditional assembly Initialize variables SETEDT: re-entrant code Push all used variables on to the stack Determine the subroutine Execute the subroutine Pull everything off of the stack Return to caller Defines limit values EDIT:

Defines jump table indexed by function switch position EDITRES: edit resolve time Goto SETOK EDTCNV: edit conversion constant Goto SETOK EDTBKG: edit background Goto SETOK EDTCAL: edit calibration time Goto SETOK EDTRAT: edit rate of rise setpoint Goto SETOK EDTCID: ensures the number is an integer. Ensure number is integer by converting to integer and back to floating point.

-Call FCMPER to compare number to 255 If greater than 255 goto CIDERR Convert number into a 1-byte integer Goto SETOK DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION EO1.f 145 of 189 940960S1DD PLN

CIDERR:

Call SETERC to indicate invalid value EDTALR: high alarm Call FCMPER to compare number to defined high value If not valid then goto ALRBAD Else goto SETOK ALRBAD:

Goto SETERC to report error EDTWRN: wam alarm Call FCMPER to compare number to defined high value If not valid then goto WRNBAD Else goto SETOK WRNBAD:

Goto SETERC to report error EDTLSV:

Call CHKRNG to check for an even power of 10 If not a valid value then goto LSVBAD Copy new low scale setpoint Copy full scale setpoint Call FCMPER to compare full scale setpoint to low scale setpoint If full scale is less than low scale then goto LSVBAD Goto SETOK LSVBAD:

Goto SETERC to indicate invalid value EDTFSV - high scale analog output Call CHKRNG to check for an even power of 10 If not valid then goto FSVBAD Copy new high scale setpoint Copy low scale setpoint Call FCMPER to compare full scale to low scale If full scale is less than low scale then goto FSVBAD Goto SETOK FSVBAD:

Goto SETERC to indicate invalid value EDTOVR: over range Copy new over range setpoint Copy appropriate 'zero' as defined at the beginning of the module Call FCMPER to compare over range and 'zero' If over range is less than 'zero' then goto OVRBAD

-Copy '1E9" Copy new over range Call FCMPER to compare the two If '1 Eg' is less than over range then goto OVRBAD Copy new over range Copy high alarm setpoint DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION .0W'( 146 of 189 PLN

Call FCMPER to compare the over range and high alarm setpoints If over range is greater than or equal to high alarm then goto OVROK OVRBAD:

Goto SETERC to indicate invalid value OVROK:

Goto SETOK SETERC: routine to Set ERROT_4 to '3' Indicate error condition Return to caller SETOK:

Clear error indicator Return to caller CHKRNG: routine to check for even power of ten Get start of power of ten table RNGLUP:

Look for match in most significant digit If match is found then goto GOTRNG Get next entry in the table If not end of table then goto RNGLUP Indicate range not found GOTRNG:

Return to caller FCMPER: routine to compare two real numbers Input: FLT11 and FLT21

-Output: result returned in condition flags FLT11 = FLT21 carry flag clear, zero flag set FLT1 I > FLT21 carry flag clear, zero flag clear FLT1 I < FLT21 carry flag set, zero flag clear Get FLTi1, argument I exponent Isolate sign bit Move it over Get FLT21, argument 2 exponent Isolate sign of mantissa Move it over If signs are not equal then goto FX Get argument I exponent Clear the mantissa sign Get argument 2 exponent Clear the mantissa sign

- Ifthe-exponents are not-equal then goto FX Get argument 1 mantissa Get argument 2 mantissa If mantissas are not equal then goto FX DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION M[ANAGEMENT 9405603 REV ECN NO. ED FOR DOC CTRL SHEET NO. SIZE 2 13016 CTION 04'ftl 147 of 189 1 PLN

FX:

Return to caller 6.2.24 Swisvc.s - Supervisory services Initialize variables and offsets SVCTBL: table of addresses. The order number of the subroutine should be the same as the service number in the appropriate macro.

(0) SVCEX - breakpoint routine (1) PUSHX - QED (2) PULLX - QED (3) ADDBX - Add accumulator B to index registerX (4) SWAPDX - Swap index register X and accumulator A, B (5) ADDX - Add signed byte to index register X (6) SVCEX - Add signed byte to S ( NA)

(7) SVCEX - Build MR/HR (8) FADD - Floating Add (9) FADD - Floating subtract (uses add routine)

(10) FMUL - Floating Multiply (11) FDIV - Floating divide (12) SVCEX - Floating log (E) (NA)

(13) SVCEX - Floating exp (E) (NA)

(14) FCMP - Floating compare (15) FGETI - Convert integer to float (16) FPUTI - Convert float to integer (17) HEX2FP - Convert display to float (18) FP2HEX - Convert float to display (19) SVCEX - Read a message (NA)

(20) -- SVCEX - Write a message (NA)

(21) SVCEX -Add ataskto the queue (NA)

(22) SVCEX - Remove a task from the queue (NA)

(23) SVCEX - Load accumulatorA from address (X+accumulator B)

(24) SVCEX - Store accumulator A to address (X+accumulator B)

(25) FSTR - Store argument I into argument 2 (26) CMPLI - Compliment argument 1 (27) FNORM - Normalize argument I SW1SVC:

Clear interrupts for COMSVC Get the SVC service code byte Double it into an SVCTBL offset If offset is less than the maximum offset then goto L100 Goto SVCERO LI 00:-calculates the offset into SVCTBL Get the table address Save the address Get the low byte in accumulator A DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT o 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,*&%(*d 148 of 189PN 940956035DDf

Save accumulator A on the stack Get the high byte in accumulator A Save accumulator A on the stack Add in the offset Restore the stack Get pointer to address of routine Clean up the stack Get the address of the routine Jump to the routine SVCEX: parameter list will always contain at least two arguments. The first argument will always be the number of bytes in the argument list.

The second argument will be the service code byte.

Get section code space Get the parameter list length byte Get the stack address Add the length to the stacked PC Restore to stacked PC Return from interrupt PUSHX: routine to save information on the stack, entered with the stack pointing to the stacked registers.

Make a two byte space on the stack Set counter to '7' L200:

Move the stacked registers down two bytes Increment the index register X Decrement the counter If all seven bytes of register have not been moved then goto L200 Copy index register X into the space just created Goto SVCEX PULLX: routine entered with stack pointing to the stacked registers Copy the last 2 bytes pushed into the stacked X Move the register stack up 2 bytes Set the counter to '7' L210:

Move the register stack up to bytes Decrement the index register X Decrement the counter If counter is greater than zero then goto L210

-Release the-two-bytes of stack

__Goto _SVCEX __..

ADDBX: routine entered with stack pointing to the stacked registers Move stacked X into accumulator A and B Add stacked B to A,B DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SSi E 2 3076 PRODUCTION . 149 of 189 PLN

Restore accumulators A, B to index register X Goto SVCEX SWAPDX: routine entered with stack pointing to the stacked registers Swap lower byte of index register X with accumulator B Swap higher byte of index register X with accumulator A Goto SVCEX ADDX: routine entered with stack pointing to the stacked registers Clear accumulator B Get the signed 8 bit argument If it is greater than or equal to zero then goto L220 Decrement accumulator B L220:

Add stacked index register X to accumulator A,B Store accumulator A, B to stacked index register X Goto SVCEX FSTR: routine to store the floating pointing number from argument 1 into argument 2.

Get first and second bytes from argument 1 Store bytes in first and second bytes of argument 2 Get third and fourth bytes from argument 1 Store bytes in third and fourth bytes of argument 2 Goto SVCEX FNORM: routine to normalize a floating point number

-Get stack pointer .

Get offset to stacked program counter Get the number Get fourth byte of the number If not equal to zero then goto CHKNOR Get next reference byte If it is not equal to zero then goto CHKNOR Get next reference byte If it is not equal to zero then goto CHKNOR Set exponent to zero Goto NEXIT CHKNOR:

Get the first byte of the mantissa in accumulator A Save a copy in accumulator B Mask off lower nibble

-- If equal to hex zero then goto NEXIT

...- Restore accumulatorA.

Shift left 4 bits Get the second byte of the mantissa in accumulator B Shift right 4 bits Add the two nibbles together DATE 1 TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION I  ?,¥%W 150 of 189 4 PLN

Save the result Get the second byte of mantissa in accumulator A Shift it left 4 bits Get the third byte of mantissa in accumulator B Shift it right 4 bits Add the nibbles together Save the result Get the third byte of mantissa in accumulator A Shift it left 4 bits Save it Decrement the exponent Goto CHKNOR NEXIT:

Goto SVCEX CMPLI: routine to take floating number pointed at by the index register and complement it.

Get stack pointer Push argument on the stack Get the argument Do one's complement of first byte of mantissa Do one's complement of second byte of mantissa Do one's complement of third byte of mantissa Increment third byte If not equal to zero then goto CEXIT Increment second byte Ifnot equal to zero then goto CEXIT Increment first byte CEXIT:

Get the exponent Complement the sign Save the new exponent CFINE:

Goto SVCEX FADD: routine to add two floating point numbers. Input: argument 1, argument 2. Output: argument 3; argument I is added to argument 2.

Get top of stack pointer Push argument I on the stack Clear accumulator A Push accumulator A on stack as guard byte Get third byte of mantissa for argument 1 Put it on the stack Get second byte of mantissa for argument 1 Put it on the stack DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1231o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SE 2 3076 PRODUCTION 611.%X- 151 of 189 PLN

Get first byte of mantissa for argument I Put it on the stack Get the exponent for argument 1 Put it on the stack Get stack pointer Update stack pointer Push argument 2 on the stack Clear accumulator A Push accumulator A on stack as guard byte Get third byte of mantissa for argument I Put it on the stack Get second byte of mantissa for argument 2 Put it on the stack Get first byte of mantissa for argument 2 Put it on the stack Get the exponent for argument 2 Put it on the stack Update stack pointer If most significant byte of argument 2 is equal to zero then goto LPAGE Get service code If not subtract then goto LPAGE Complement the sign of argument 2 Do one 'no operation' statement LPAGE:

Put most significant byte of argument 2 on the stack Clear accumulator A Put accumulator A on stack as guard byte Put accumulator A on stack three times for the mantissa of the result Put '40H' on the stack for exponent of zero for result Get the stack pointer FIRST: offset of argument 1 set to '10' SECN: offset of argument 2 set to '5'

• RES: offset of result set to '0' Clear swapping flag If argument I mantissa is not zero then goto NZI Increment swap flag to indicate argument 2 is bigger Goto ADD-GO NZI:

If argument 2 mantissa is not equal to zero then goto NZ2 Goto ADDGO NZ2:

Get argument I exponent

_Remove thesign..........

Get-argument 2 exponent Remove the sign If argument 1 exponent is greater than or equal argument 2 exponent then goto NOSWP DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION - 152 of 189 PLN

Put argument 1 on the stack Increment swap flag Transfer from accumulator B to accumulator A Pull accumulator B from the stack NOSWP:

Subtract accumlator B from accumulator A Save the number of shifts If number of shifts is less than '7' then goto GOSHF If swap flag is equal to zero then goto ZSEC Get offset for argument I Call AINCX to get the values Goto ZEROA ZSEC:

Get offset for second argument Call AINCX ZEROA:

Set the exponent to '40H' Clear byte 1 Clear byte 2 Clear byte 3 Clear guard byte Goto ADDGO GO SHF:

Get top of stack pointer Get exponent for argument 1 Get magnitude of exponent Get exponent for argument 2

--- Get magnitude of exponent If argument 1 is greater than argument 2 then goto SHFT2 Get the offset off of the stack for argument 1 Call ACINX to get the values Goto SHFGO SHF2:

Get offset off of the stack for argument 2 Call ACINX to get the values SHFGO:

Get the number of shifts If the number of shifts equal zero then goto SHFX SHFTP:

Initialize counter to '4' SHFRN:

Shift most significant bit right 4 bits

--- Rotate rightn ext byte-

___Rotate-right least significant byte Rotate right guard byte Decrement counter If counter not equal to zero then goto SHFRN Increment the exponent DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNcoR RADIATION MANAGEMENT 111312 9405603 REV ECN NO. ASED FOR DOG CTRL SHEET NO. 9 SIZE 2 13076 DUCTION .9?4IM( 153 of 189 D PLN

Decrement the numbe shifts If number of shifts is not eq 4. zero goto SHF_TP SHF_X:

Get top of stack pointer If sign Of e-xponent for argument I is equal to sign of exp ent f argument 2 then goto ADDGO Set counter to '4' CTOP:

If byte of argument 1 not equal byte of argument 2 then goto COUT Increment argument byte offset Decrement counter If counter not equal to zero then goto CTOP Get stack pointer Set exponent of result equal to '40H' Set all three bytes of mantissa of result equal to '0' Set guard byte to '0' Goto CLEAN COUT:

Get top of stack pointer If carry is set goto COMI Get exponent for argument I Save exponent in result Get offset for second argument Call AINCX for argument 2 values Goto COMA COM1:

Get exponent and sign for argument 2 Save exponent in result Get offset for first argument Call AINCX for argument I values COMA:

Complement most significant byte Complement next byte Complement least significant byte Complement guard byte Increment the guard byte If the carry bit is clear then goto ADAS Get byte 3 of mantissa If carry bit is clear then goto ADAS Add '1' Save byte 3 If carry is clear then goto ADAS

_...Get byte 2 of mantissa Add '1' Save byte 2 If carry bit is clear then goto ADAS DATE 10/23=OTITLE SOFTWARE DESIGN DESCRIPTION, SYNcot RADIATION MANAGEMENT 1~- 9405603 REV ECN NO. RELEASED FOR DOG CTRL SHEET NO. SIZE 2 3076 PRODUCTION .?,' 154 of 189 94095603SDD PLN

Get byte 1 of the mantissa Add '1' Save byte I Goto ADAS ADDGO:

Get top of stack pointer Get first argument If swap flag is equal to zero then goto AD_GI Get second argument AD GI:

Save in results ADAS:

Get stack pointer Get the exponent of result Store it Add argument 1 guard byte to argument 2 guard byte Save in result guard byte Add argument 1 LSB to argument 2 LSB Save in result LSB Add argument 1 MID to argument 2 MID Save in result MID Add argument 1 MSB to argument 2 MSB Save in result MSB If carry is clear then goto CLEAN Save condition codes Get sign of first argument Get sign of second argument If the signs are not equal then goto CLEAN Restore the condition codes Get stack pointer Get the service code If subtract operation then goto CLEAN Save the condition codes Set counter to '4' Restore the condition codes OVSHF:

Get pointer to top of stack Rotate right result byte 1 of mantissa Rotate right result byte 2 of mantissa Rotate right result byte 3 of mantissa Rotate right result guard byte Clear the carry bit Decrement the counter If-counter is greater than zero then goto OVSHF

-increment-exponent of result DATE TITLE SOFTWARE DESIGN DESCRIPTION,

-SYNcOR-RADIATION MANAGEMENT Lo 3, 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 0,i1WY( 155 of 189 , PLN

CLEAN:

Get top of stack pointer Get pointer to argument 3 Get result exponent from the stack Save it in argument 3 exponent Get MSB of result from the stack Save it in argument 3 MSB Get MID of result from the stack Save it in argument 3 MID Get LSB of result from the stack Save it in argument 3 LSB Set counter equal to '11' to clean up stack CLT:

Get value from stack Decrement counter If counter is not equal to zero then goto CLT Goto SVCEX AINCX: routine to increment index register X to offset passed in register B If B is equal to zero then goto AlEX Decrement B Increment index register X Goto AINCX ALEX:

Return to caller FSUB: stub FMUL: -routine to multiply two floating point numbers. Input: multiplicand, multiplier, and result. Multiplicand and multiplier are left unchanged, result is normalized.

Get pointer to top of stack Get address of argument 2 Get byte 1 of argument 2 mantissa Save it in index register X Put it on the stack Get byte 2 of argument 2 mantissa Save it in index register X Put it on the stack Get byte 3 of argument 2 mantissa Save it in index register X Put it on the stack Get pointer to top of stack Get address of-argument 3 Get-byte 3 off of the stack Save it in argument 3 byte 3 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCORRADIATION MANAGEMENT ¶o3,o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SE 2 3076 PRODUCTION *¥?*'t" 156 of 189PL 94095603SDD 1

Get byte 2 off of the stack Save it in argument 3 byte 2 Get byte I off of the stack Save it in argument 3 byte 1 Save a 0 in argument 3 exponent Get pointer to top of stack Get pointer to argument 1 Save argument I expont on the stack Save argument I byte I on the stack Save argument I byte 2 on the stack Save argument I byte 3 on the stack MULINT; Set the loop counter to '25' MULSTR:

Get pointer to top of stack Get address of argument I Rotate to the right byte 1 of argument 1 Rotate to the right byte 2 of argument I Rotate to the right byte 3 of argument 1 Decrement the loop counter If loop counter is equal to zero then goto MULDN If the shifted bit in argument 1 is not set then goto SHFTR Get pointer to top of stack Get address of argument 2 Get byte 3 of argument 2 Get address of argument 3 Add argument I byte 3 to argument 3 byte 3 Save result in argument 3 Get byte 2 of argument 2 Add with carry byte 2 of argument 2 to byte 2 of argument 3 Save result in argument 3 Get byte I of argument 2 Add with carry byte 1 of argument 2 to byte I of argument 3 Save result in argument 3 SHFTR:

Get pointer to top of stack Get address of argument 3 Rotate to the right byte 1 of argument 3 Rotate to the right byte 2 of argument 3 Rotate to the right byte 3 of argument 3 Goto MULSTR MULDN:

Get pointer to top of stack

-Get address of-argument 1 Get byte 3 off the stack Store in byte 3 of argument 1 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603

-0'23/02 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION I  %'%Yf 157 of 189 PLN

Get byte 2 off the stack Store in byte 2 of argument 1 Get byte 1 off the stack Store in byte 1 of argument I Get exponent off the stack Store in exponent for argument 1 Get pointer to top of stack Get address of argument 3 Store '0' in exponent for argument 3 Set counter to '5' for number of nibbles Put counter on the stack NCHK:

Get byte I of mantissa for argument 3 Shift right Shift right Shift right Shift right If not equal to 'OOOH' then goto SETS Set counter to '3' Clear carry bit SHIFT:

Rotate left byte 3 pointed at by the index register Rotate left byte 2 pointed at by the index register Rotate left byte 1 pointed at by the index register Decrement counter If counter is greater than or equal to 0 then goto SHIFT Get the exponent pointed at by the index register Increment the exponent Save it -..

Decrement number of nibbles If number of nibbles is greater than or equal to 0 then goto NCHK SETS:

Restore the stack Get pointer to top of stack Get address of argument I Get signed exponent for argument I Get address of argument 2 Get signed exponent for argument 2 Get the sign of the exponent for argument 1 Get the sign of the exponent for argument 2 Get address of argument 3 Store signed exponent of argument I in the result If sign of exponent for argument 1 is equal to sign of exponent for

-argument 2 then goto PAGEN STNEG:

OR the exponent of argument 3 with '100000008' Store the result in argument 3 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 947W _I 158 of 189 PIN

PAGEN:

Get 1pointer to top of stack Get address of argument 1 Put exponent for argument 1 in accumulator A Get pointer to top of stack Get address of argument 2 Put exponent for argument 2 in accumulator B Mask out the sign for argument I exponent Mask out the sign for argument 2 exponent Add the two exponents together Subtract '040H' from accumulator A Get pointer to top of stack Get address of argument 3 Put argument 3 exponent in accumulator B Mask out the sign If it is not equal to '06H' then goto MSEXP Set exponent equal to '040H', real zero Goto MEXIT MSEXP:

Subtract accumulator B from accumulator A Put exponent for argument 3 in accumulator B Mask all but the sign bit Save only the sign bit in exponent of argument 3 Or accumulator A with exponent of argument 3 Save result in argument 3 MEXIT:

Goto SVCEX FDIV: data space Defines ADDR Call FPDIV Defines argument I Defines argument 2 Defines result Goto SVCEX FPDIV: routine to divide floating point numbers. During execution of this routine the index register points to a block defined as:

Byte 0 Scratch Byte I Overflow indicator Byte 2-6 Result Byte 7-11 Argument 2 Byte 12-16 Argument I

--- Byte 18-PC of caller

-The extra reference byte added to each argument is a guard byte used to maintain accuracy and is referred to as the overflow byte.

DATE TiTLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,0z# 159 of 189 9493DD P PLN

Set accumulator B to 'I' to indicate divide FPARG:

Get pointer to top of stack Get address of calling sequence Get address of argument I Save address Get first byte of argument 1 If not equal to zero then goto OK If byte 1 is not equal to zero then goto OK If byte 2 is not equal to zero then goto OK If byte 3 is not equal to zero then goto OK Get pointer to top of stack Get address of calling sequence Get address of argument 3 Store floating point zero in argument 3 Restore stack to before call status Goto SVCEX OK1 Restore the index register Clear the overflow byte Put argument I LSB of mantissa on the stack Put argument 1 MID of mantissa on the stack Put argument I MSB of mantissa on the stack Save the function code on the stack Put exponent on the stack Make a copy of argument 1 Subtract '040H' from it Remove the sign Save it in the index register X Get the original argument 1 Get the sign Get the value of the exponent Restore the exponent Get the code off the stack Put the exponent on the stack Get pointer to top of stack Adjust stack pointer to address before call status Get address of argument 2 Save zero on the stack Get LSB of mantissa for argument 2 Put it on the stack Get MID of mantissa for argument 2 Put it on the stack Get-MSB-of mantissa for argument 2 Put it on the stack Save function code on the stack Get the exponent for argument 2 Make a copy of it DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SE 2 3076 PRODUCTION  ?,.'(. 160 of 189 6O3SPLN

Subtract '040H' from exponent Remove the sign Save the result in index register X Get original exponent Get the sign Get the value of the exponent Save the exponent Get back the function code from the stack Put the exponent on the stack Clear space on the stack for result Clear space on the stack for scratch space Get the final index register pointer Iffunction code is equal to '1' for divide then goto DVSUB1 FPOUT:

Ifrounding is not to be done then goto X01 5 Get LSB of mantissa of result Increment it Ifcarry not equal to zero then goto X015 Get MID of mantissa of result Increment it Ifcarry not equal to zero then goto X015 Get MSB of mantissa of result Increment it Ifcany not equal to zero then goto X015 Set counter to '04H' X014:

Rotate MSB to the right Rotate MID to the right Rotate LSB to the right Rotate guard byte to the right Clear the carry Decrement the counter If counter is not equal to zero then goto X014 Increment the exponent If exponent overflow then goto FPOVF1 Rotate scratch area to the left Rotate exponent to the right X015:

Get overflow flag in accumulator B Get address of result Save a copy of it Get the exponent's sign If sign is equal to zero the goto POSX, sign is positive NEGX:

- Get-theoriginal-exponent Remove the exponent sign Goto*POSXl DATE TTLlE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 102o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 94%.¥f 161 of 189 PLN

POSX:

Get the original exponent AND it with '040H' to make the XS64 exponent POSX1:

Save the exponent Save the MSB of the mantissa Save the MID of the mantissa Save the LSB of the mantissa Set counter to '11' X020:

Pop the stack Decrement the counter If the counter is not equal to zero then goto X020 Get the address of the stack Get the return program counter Clean the stack If the overflow flag is equal to zero then goto X030 Set the overflow bit X030:

Goto address pointed to by program counter FPOVFI:

Goto FPOVF DVSUB1:

Goto DVSUB2 ADSUBI:

Goto ADSUB2 ARGI:

Set argument I offset to '12' ARG2: --

Set argument 2 offset equal to '7' ARG3:

Set argument 3 offset equal to '2' RESULT:

Set result offset equal to '2' FPOUT2:

Goto FPOUT MULSUB:

Get argument 1 Goto NORMX1 to normalize it Get argument 2 Goto NORMXI to normalize it FPM20:

Set loop counter to '25'

_-Clear-scratch -area Clear the LSB DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10/23/02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION , 162 of 189 94095603SDD PLN

FPM30:

Rotate MSB of argument 1 to the right Rotate MID of argument I to the right Rotate LSB of argument 1 to the right Decrement counter If counter is equal to zero then goto FPM40 If shifted bit of argument 1 was not set then goto FPM35 Add in LSB of argument 2 Add in MID of argument 2 Add in MSB of argument 2 FPM35:

Rotate MSB of the result to the right Rotate MID of the result to the right Rotate the LSB in accumulator B to the right Rotate the guard byte to the right to save shift out in overflow Goto FPM30 FPM40:

Save LSB of argument 2 Get the sign of the result Make a copy Clear local overflow flag Get exponent in arithmetic form Add the exponents FPM45:

If exponent overflow then goto FPMOVF Clear the carry Rotate accumulator to the right FPM37:

Add in the sign Get the address of the result Goto NORMX1 If overflow flag is not set then goto FPOUT2 Increment the exponent ADSUB2:

Goto ADDSUB FPMOVF:

If underflow then goto FPUND Get the result If the overflow flag is not equal to zero then goto FPOVF If normalizing is not needed then goto FPOVF Set the exponent to '03FH', maximum for exponent Set local overflow Goto FPM37 NORMXI:

-Goto NORMX2-DVSUB2:

Goto DVSUB3 DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1o2o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 36O TN103DD *aY¥E'(

PRODUCTION 163 of 189 PLN

FPOUTI:

Goto FPOUT2 FPOVF:

Mask out the sign by AND with '080H' Set exponent to the maximum value Set the overflow Goto FPMUL10 FPUND:

Clear accumulator B to set exponent to zero Clear accumulator A to set fraction to zero FPMUL10:

Set the result fraction to zero Set the result exponent to zero Goto FPOUT1 FPM456:

Goto FPM45 ADDSUB:

Put the LSB on the stack Get the address of argument 1 Goto NORMX2 to normalize argument I Get the address of argument 2 Goto NORMX2 to normalize argument 2 Set counter to '8' Get argument I exponent Left justify it Get argument 2 exponent Left justify it FPA05:

Decrement the counter If counter is less than zero then goto FPA25 If exponent from argument I is equal to exponent from argument 2 then goto FPA30 If exponent from argument I is greater than exponent from argument 2 then goto FPA20, because argument 1 is bigger Call FPAS1 to shift argument I four times Add '2' to exponent from argument I Goto FPA05 FPA20: argument 2 is smaller than argument I CAll FPAS2 to shift argument 2 four times Add '2' to exponent form argument 2 Goto FPA05 FPASI: shift argument I one bit to the right Clear the carry

-Rotate each byte of argument 1 to the right Return to caller DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 RELEASED FOR DOC CTRL SHEET NO. SIZE REV ECN NO.

2 3076 PRODUCTION I  ?,'(

Y. 164 of 189 1 PLN

FPAS2: shift argument 2 one bit to the right Clear the carry Rotate each byte of argument 2 to the right Return to caller FPA25:

If argument I exponent is greater than argument 2 exponent then goto FPA30 Transfer argument 2 exponent to accumulator A Goto FPA30 FPOUT3:

Goto FPOUT1 DVSUB3:

Goto DVSUB4 NORMX2:

Goto NORMX3 FPUND5:

Goto FPUND FPM455:

Goto FPM456 FPOVF3:

Goto FPOVF FPA30:

Save new exponent in the result Call FPAS1 to make room for sign in fraction for argument 1 Call FPAS2 to make room for sign in fraction for argument 2 If argument 1 is not negative then goto FPA40 FPA40:

If argument 2 is not negative then goto FPA50 Get the address of argument 2 in accumulator A Goto COMXl to complement it FPA50:

Get function code from the stack If function code is not equal to '2' (add) then goto FPS10 Add argument I to argument 2 byte by byte Store in result FPA55:

If there was no overflow then goto FPA60 Save the MSB of the result Set counter to '4' Rotate MSB to the right to bring in lost bit Goto FPA58 FPA57:

Shift MSB of the result to the right FPA58:

-- Rotate MID of result to the right Rotate LSB of result to the right Rotate guard byte of result to the right Decrement the counter DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 109405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,.-1W 165 of 189 PLN

If counter is not equal to zero then goto FPA57 Increment the exponent of the result If there is no overflow then goto FPA61 Rotate left MSB of result to set the overflow FPA59:

Rotate argument 2 to the right FPOVF2:

Goto FPOVF3 FPA80:

Goto FPOUT3 NORMX3:

Goto NORMX4 DVSUB4:

Goto DVSUB5 FPUND4:

Goto FPUND5 FPM454:

Goto FPM455 FPA60:

Save the MSB in result FPA61:

If the result is not negative then goto FPA70 Get the address of the result Call COMX1 Set the carry If the result is too big to compare then goto FPA59 FPA70:

Shift the sign into the result Move the sign back to the exponent If the result is normalized then goto FPA80 Call NORMX to normalize the result Goto FPA80 NORMX4:

Goto NORMX DVSUB5:

Goto DVSUB6 FPUND3:

Goto FPUND4 FPM453:

Goto FPM454 COMXI:

Goto COMX FPS10: subtract the two quadruple arguments

-Get-argument - exponent Subtract argument 2 exponent Save result DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,9.¥Z'f. 166 of 189 PLN

Get argument I LSB Subtract argument 2 LSB Save result Get argument 1 MID Subtract argument 2 MID Save result Get argument 1 MSB Subtract argument 2 MSB If the carry bit is set, then goto FPS20 Set the carry bit Goto FPA55 FPS20:

Clear the carry bit Goto FPA55, to check the overflow and normalize FPOVF4:

Gotot FPOVF2 NORMX: Nomalization routine, where accumulatorA contains the offset to argument from normal X. All registers except X are destroyed. V is set if underflow would occur if number is normalized. Z is set if argument is equal to zero.

Save index register X on stack Clear byte NLI:

Increment index register X Decrement accumulator A If not equal to zero, then goto NLI Check for zero If equal to zero, then goto NRMZRO Save sign in accumulator B with offset Double the exponent NRM01:

If normalized goto NRMOUT Decrement argument If V bit set, then goto NRMOVF, next shift will cause underflow Decrement argument Goto NRMSH4, to shift 4 bits Goto NRM01 NRMOVF:

Increment argument, to restore the exponent Check overflow bit after the shift NRMOUT:

Put the sign back NRMXIT:_ _

Get index register X off the stack DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNcOR RADIATION f MAGEMENT 1o o2 9405603 REV ECN NO. ED FOR DOC CTRL SHEET NO. SIZE 2 3076 CTION .ý,M,(. 167 of 189 D PLN

NRMLP:

Decrement index register X Decrement accumulator A Get current status Save the interrupt status Return to caller NRMSH4: routine to shift triple byte left 4 bits Set counter to '4' NSHLOP:

Shift the overflow byte left Rotate left the LSB Rotate left the MID Rotate left the MSB Decrement the counter If counter is not equal to zero, then goto NSHLOP Return to caller NRMZRO:

Set the Z' bit Clear the exponent Goto NRMXIT DVSUB6:

Goto DIVSUB FPUND2:

Goto FPUND3

-FPM452:..

Goto FPM453 FPOVF5:

Goto FPOVF4 COMX: Two's complement routine, where accumulator A contains the offset to argument from present X (0-64). Registers are lost.

Save offset in accumulator B COM10:

Increment index register X Decrement accumulator A If not equal to zero, then goto COM 10 Save condition codes Complement MSB

_-_Complement-MID

__Complement-LSB-......

Complement overflow byte Increment overflow byte If not equal to zero, then goto COMOUT DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 9?c%'4l 168 of 189 PLN

Increment LSB If not equal to zero, then goto COMOUT Increment MID If not equal to zero, then foto COMOUT Increment MSB If V' bit is set, then goto COMXX COMYY:

Save condition code COMOUT:

Decrement index register X Decrement accumulator B If not equal to zero, then goto COMOUT Save condition codes Return to caller DIVSTP:

Goto FPOVF4 NORMX5:

Goto NORMX FPOVF6:

Goto FPOVF5 FPM451:

Goto FPM452 FPUNDI:

Goto FPUND2 COMXX:

Set counter to '4' COM22:

Clear carry bit S--Rotate right the MSB Rotate right the MID Rotate right the LSB Rotate right the overflow byte Decrement the counter Increment the exponent Increment the exponent Goto COMYY DIVSUB: Divide argument 2 by argument 1, save result in argument 3 Get argument 2 Goto NORMX5 Get argument I Goto NORMX5 If overflow bit is set, then goto DIVSTP If equal to zero, then goto DIVSTP FPD15:

Set counter to '5' DATE TITLE SOFTWARE DESIGN DESCRIPTION,

-SYNCORRADIATION AIANAGEMENT 1 0-9405603 REV ECN NO. ED FOR DOC CTRL SHEET NO. 9 SIZE 2 3076 CTION 169 of 189 1YY' I PLN M

DSHF5:

Shift the MSB of argument 2 to the right Rotate the MID of argument 2 to the right Rotate the LSB of argument 2 to the right Rotate the overflow byte of argument 2 to the right Decrement the counter If counter is not equal to zero, then goto DSHF5 Shift the MSB of argument 1 to the right Rotate the MID of argument 1 to the right Rotate the LSB of argument I to the right Rotate the overflow byte of argument I to the right Get the overflow byte of argument 2 Set counter to '29', 26 bits to do with overflow FPD40:

Save count on the stack Shift argument 2 left one bit Rotate left LSB of argument 2 Rotate left MID of argument 2 Rotate left MSB of argument 2 Shift result left one bit Rotate left LSB of result Rotate left MID of result Rotate left MSB of result Subtract LSB of divisor from LSB of dividend Subtract MID of divisor from MID of dividend Subtract MSB of divisor from MSB of dividend If carry bit is set, then goto FPD55 Goto FPD50 FPUNDO:

Goto FPUNDI FPM450:

Goto FPM451 FPOVF7:

Goto FPOVF6 FPD50:

Add LSB of dividend to LSB of divisor Add MID of dividend to MID of divisor Add MSB of dividend to MSB of divisor Goto FPD60 FPD55:

Increment overflow byte of result FPD60:

Get counter from the stack

-- Decrement counter

-If counter is not equal to zero, then goto FPD40 Set shift counter to 3' DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MNWAGEMENT 3o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 9?,E% 170 of 189 PLN

SHFR3:

Shift the overflow byte of the result left Rotate the LSB of the result to the left Rotate the MID of the result to the left Rotate the MSB of the result to the left Decrement shift counter If shift counter is not equal to zero, then goto SHFR3 Get exponent of result Save it for sign calculation Exclusive OR it with argument 1 Extract the sign Clear the local overflow Double exponent for argument 2 Double exponent for argument 1 Subtract argument I exponent from argument 2 exponent If there is no overflow, then goto FPD70 If there is an underflow, then goto FPD80 Goto FPOVF7, since there is a definite overflow FPD70:

Add '2' to argument 2 exponent FPD75:

Goto FPM450 FPD80:

Add '02H' to argument 2 exponent If overflow, then goto FPD85 Goto FPUNDO FPD85:

Clear overflow bit Goto FPD75 FCMP: Floating point compare routine. This routine assumes that any number compared will be previously normalized. This allows for the second byte alone to identify a zero, in which case that byte is used in the exponent checking.

Format is LABEL FCMP ARG1,ARG2. Where ARGI and ARG2 are the starting addresses of the two numbers to be compared.

The results of the compare will be in the CCR.

Get the first byte of argument I in accumulator B Get the first byte of argument 2 in accumulator A If the exponents are equal, then goto CPAGE1 Goto EXITC CPAGEI:

--- Get the-second byte of argument 1 into accumulator A If it is equal to zero, then goto ZEROI Get the exponent for argument 1 in accumulator A DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT /--29405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION iryal(f" 171 of 189 PLN

ZEROI:

Get the second byte of argument 2 in accumulator B If it is equal to zero, then goto ZERO2 Get the exponent for argument 2 ZERO2:

Compare just the exponents If the exponents are equal, then goto CPAGE2 Goto EXITC CPAGE2:

Get the second byte of argument I into accumulator A Get the second byte of argument 2 into accumulator B If the bytes are equal, then goto CPAGE3 Goto EXITC CPAGE3:

Get the third byte of argument I in accumulator A Get the third byte of argument 2 in accumulator B If they are equal, then goto CPAGE4 Goto EXITC CPAGE4:

Get the fourth byte of argument I in accumulator A Get the fourth byte of argument 2 in accumulator B Compare accumulator A and B EXITC:

Get the CCR value Save it on the stack Goto SVCEX HEX2FP: Routine to take the BCD encoded numbers from the thumbwheel and convert them to Victoreen floating point format.

This routine is not reentrant.

Exponent sign is represented as:

Representation Sign Value 8 +1 3 +0 0 -1 7 -0 Get the exponent byte Isolate the exponent representation If the exponent is not equal to +1, then goto EXPZER Get the exponent Isolate the right half of the exponent Add ten to exponent value Set flag to indicate positive exponent GotoJEXP_-

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1*3Io2 -9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SE 2 3076 PRODUCTION M.I(t' 172 of 189 PLN I Iw.

EXPZER:

if exponent is not equal to zero, then goto EXPNON Get the exponent Isolate the right half of the exponent Set flag to indicate positive exponent Goto TEXP EXPNON:

If exponent is not equal to -1, then goto EXPNZE Get the exponent Isolate right half of the exponent Set flag to indicate negative exponent Goto EXPNEG EXPNZE:

Get exponent equal to -0 Isolate right half of exponent Set flag to indicate negative exponent EXPNEG:

Add '2' to absolute value Goto COMEXl TEXP:

If exponent is equal to zero, then goto STRZER If absolute value of exponent is not equal to '1', then goto COMEXP Make the exponent equal to 1 Goto COMEXI STRZER:

Make the exponent '2' Goto COMEXl COMEXP:

Decrement the exponent Decrement the exponent COMEXI:

Adjust index for 4 byte entries into table Save accumulator B Put the exponent into accumulator B Get the table address Add the offset to table address Get first byte of argument Store in first byte of multiplier Get second byte of argument Store in second byte of multiplier Get third byte of argument

---

Store inithird byte of multiplier -.

__Get-fourth byte of-argument_

Store in fourth byte of multiplier Get the stack pointer Get address of HEX number DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MAAGEMENT 1o13102 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 1041Y4W 173 of 189 PLN

Get ones digit and 'E' I~olate digit Get hundred and tens digit Isolate the tens digit Get address of tens conversion table Add offset to table address Get tens representation of value Get tens and ones result in A Get stack pointer Get address of HEX number Get hundreds and tens digit Isolate hundreds digit Double the index Get address of hundreds conversion table Add offset to table address Get hundreds representation of value Get tens and ones result in accumulator B Add offset Store HEX value Get fixed exponent value Store exponent Zero out last byte Save it Get exponent flag If flag is equal to zero, then goto POSEXP Call FDIV Goto STRSLT POSEXP:

Call FMUL .

STRSLT:

Get stack pointer Get address of result Get result byte by byte and store it Goto SVCEX TENTAB: Table with HEX representations of multiplies often, values from 00 to 90.

HUNTAB: Table with HEX representations of multiplies of hundred, values from 000 to 900.

HXREFAB: Table with floating point values for conversion, values from I EO to 1E21.

EP_2HEX:_ Routineto convert floating point to BCD display format.

This routine is not reentrant.

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 6Z-/,'1 174 of 189 PLN

Error code = Byte 0 of second argument 0 = result is good 1 = value is negative, no conversion made 2 = exponent too large or too small Calling protocol: LABEL FPEHEX FPADDR,DISPADDR Define local variables Get stack pointer Get address of floating point number Get the exponent If exponent is valid, then goto EXPOK Goto BADEXP EXPOK:

If exponent is not negative, then goto PEXP Goto NEGVAL PEXP:

Get exponent If the exponent is negative, then goto NEGEXP Subtract '040H' from the exponent Set the flag to indicate positive exponent Goto TSTEXP NEGEXP:

Subtract exponent from '040H' Put result in accumulator A Make a copy in accumulator B Set up flag to indicate negative exponent Add '2' to exponent Goto INDEXI TSTEXP:

If exponent is equal to zero, then goto STRZVL If exponent absolute value is not equal to one, then go to INDEX Set the value to '1' for indexing into table Set up the negative flag Goto INDEX1 STRZVL:

Set the value to '2' for indexing into table Set the negative flag Goto INDEXI INDEX:

Adjust the index to comput address of value in HXREFAB INDEXI:

Adjust index for 4 byte entries Save negative flag

-Get address of table HXREFAB

-Add offset to table address Get the exponent from the table Store it DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 1229405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 1PRODUCTION ,a*,'r-Z{f 175 of 189 94095603SDD PLN PN

Get the MSB from the table Store it Get the MID from the table Store it Get the LSB from the table Store it Get the stack pointer Get address of argument Get byte by byte and store it Get negative flag If not negative then, goto DIVEXP Call FMUL, to do a mulitply Goto EXPCK DIXEXP:

Call FDIV, to do the divide EXPCK:

Get stack pointer Get address of second argument Initialize internal flag Initialize flag for multiply Initialize value to '041AOH' for multiply and divide TSTEX:

Call FCMP to compare result to floating point zero If it is equal to zero, then goto DIVDON Get exponent of result If exponent is too large, then goto CHNGE If the exponent is equal to '043H', then go to DIVDON Increment the exponent of argument I Call FSTR to set up value to be multiplied Call FMUL, to do the multiplication Goto TSTEX, to check if exponent is equal to 43 CHNGE:

Get stack pointer Get address of temporary flag Increment flag Call FSTR to set up value to be divided Call FDIV to do the divide Goto to TSTEX to test for large exponent DIVDON:

Call GETDIG, to isolate and round off good digits CNVRT:

Set up counter on stack Set up another counter on stack

_ Put-result in-accumulatorA and-accumulator-B

---Get stack pointer __

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MA GEMENT 1o2o2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION 91,%W 1 176 of 189 PLN

CHK 3E8:

S§ubtract '3E8H' from the value If carry bit is set, then goto ADD_3E8 Increment the counter Goto CHK_3E8 ADD_3E8:

Add '3E8' to the value to restore to positive Clear the carry bit Put thousand digit in the left nibble CHK_64:

If value is not equal to '64H', then foto GRT_64 If lower byte is equal to '064H', then goto CMP_A GRT_64:

Subtract 64 from the value Increment the counter Goto CHK_64 CMPA:

Compare value to 'OOAH' If carry bit is set, then goto LSTDIG to get last digit Subtract 'AH' from the value Increment the counter Goto CMP_A LSTDIG:

Put tens digit in the left nibble Add ones digit Put result on the stack Get accumulator A off of stack, this contains units and tens Get accumulator B off of stack, this contains hundreds and thousands Save accumulator A Clear out the hundreds If value is zero, then goto NOSHFT Initialize counter to 'OOH' Restore accumulator A Clear carry bit JSTIFY:

Rotate value in accumulator B to the left Rotate value in accumulator A to the left Increment the counter If counter is not equal to '04H', then goto JSTIFY Goto PAGEA NOSHFT:

Get stack pointer

-Get-address-of argument 2

-Increment exponent counter Restore accumulator A to original value DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION ,Y'[ 177 of 189 PLN

PAGEA:

AND 'EH' with value in accumulator B Inclusive OR accumulator B with '0000111 OB' Get stack pointer Get address of argument 2 Store hundreds and tens digit Store result Get stack pointer Get address of argument I Get exponent of argument 1 Get stack pointer Get address of argument 2 Add the number of overflow byte divides to exponent of argument 2

Clear the temporary flag Subtract the number of overflow byte multiplies Clear the temporary flag If the exponent is not positive, then goto NEXP If the exponent is greater than '053H', then goto BADEXP Isolate exponent digit If digit is less than 'AH', then goto SMLEXP Subtract 'OOAH' from the exponent OR in '1000000OB' to use code 8 = +1 Goto STREXP, to store exponent SMLEXP:

OR in '001100001B', to use code 3 = +0 Goto STREXP NEXP:

If exponent is -19, the goto BADEXP Put the exponent into accumulator A Set exponent to '040H' minus exponent If exponent is less than 'OOAH', then goto SMLNEX Subtract 'OOAH' from exponent Use code 0 = -1 Goto STREXP SMLNEX:

Use code 7 = -0 STREXP:

Get stack pointer Get address of argument 2 Store exponent Goto FPDONE BADEXP:

__Set-error-code-to'2'___

_Goto ERRCOD DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCORRADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 9SE 2 3076 PRODUCTION rR?.%( 178 of 189 PLN

NEGVAL:

Set error code to '1' ERRCOD:

Get stack pointer Get address of argument 2 Store error code FPDONE:

Goto SVCEX GETDIG: Routine to isolate valid digits and round off values.

Input: value in DEND Output: index register X contains valid digits Get the exponent Ifthe value is negative, then goto NEXPON Isolate exponent value Goto GOTEXP NEXPON:

Put exponent into accumulator B Subtract accumulator B from '040H', with result in accumulator A GOTEXP:

Set counter to '4' for rotating Store counter on the stack Get stack pointer Get most significant byte of argument Get second most significant byte of argument THRDIG:

Clear the carry bit Rotate right accumulator A Rotate right accumulator B Decrement loop counter If counter is not equal to zero, then goto THRDIG Save result in index register X Adjust stack to normal Isolate determining digit RND:

If digit is less than '8', then goto GOTDIG Increment index registerX GOTDIG:

Return to caller FGETI: Routine to get floating point number.

Byte 0 Future exponent

_BytelMSB of INT

-- Byte 2 MSB of MIDDLE Byte 3 LSB of MIDDLE Byte 4 LSB of INT DATE T12LE SOFTWARE DESIGN DESCRIPTION, SYNCOR-RADIATION MANAGEMENT 1Qo2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION *?%'ff 179 of 189PN 94095603SDD6

Get itack pointer Get argument Put each byte of argument on the stack Put maximum possible exponent value ('048H') on the stack Get stack pointer TSTFG:

If accumulator B is equal to zero, then goto FINFG CONTC:

Get MSB Remove the lower nibble If it is not equal to zero, then goto FINFG Decrement the exponent Save it Initialize shift counter to '4' SL4X:

Shift byte 4 to the left Rotate byte 3 to the left Rotate byte 2 to the left Rotate byte I to the left Decrement the shift counter If shift counter is not equal to zero, then goto SL4X Get exponent into accumulator B Goto TSTFG FINFG:

If accumulator B is equal to zero, then goto NORD Get byte 4 Compare it to '080H'

-If the carry is set,-then goto NORD Get byte 3 Increment it Save it If carry is clear, then goto NORD Get byte 2 Increment it Save it If carry is clear, then goto NORD Get byte 1 Increment it Save it If carry is clear, then goto NORD Set counter to '4' SR4X:

-Rotate byte I to the right

-Rotate byte 2 to the right Rotate byte 3 to the right Decrement counter Clear the carry bit DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR-RADIATION MANAGEMENT 10/23W --9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. 9SIE 2 3076 PRODUCTION 9*?,14'1 180 of 189 PLN

If counter is not equal to zero, then goto SR4X Increment the exponent NORD:

Get stack pointer Get argument 2 Get the exponent off of stack Store it Get MSB off of stack Store it Get LSB off of stack Store it Get overflow byte off of stack Goto SVCEX FPUTI: Routine to put a floating point number is argument 2.

Input is a floating point number of 4 bytes. If the unsigned integer equivalent is out of range, zeros will be stored.

Get the stack pointer Get argument 1 Clear accumulator B Store accumulator B on the stack Get byte 3 of argument I into accumulator B Put byte 3 of argument I on the stack Get byte 2 of argument I into accumulator B Put byte 2 of argument 1 on the stack Get byte 1 of argument 1 into accumulator B Put byte I of argument 1 on the stack Get byte 0 of argument I into accumulator B Put byte 0 of argument I on the stack Get the stack pointer If the exponent is less than '049H', then goto CFPUT Zero out five bytes in index register Goto XFPUT CFPUT:

Set accumulator A to '048H', number of shifts CTES:

If accumulator A is equal to zero, then goto XFPUT Set counter to '4' RTOP:

Shift byte I to the right Rotate byte 2 to the right Rotate byte 3 to the right

-Rotate byte 4-to the right Decrement counter If counter not equal to zero, then goto RTOP Decrement number of shifts DATE T[ILE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION I f'1 181 of 189 94095603SDD PLN

Goto CTES SVCERO: The SVC error handler. Input is number of argument bytes in accumulator B.

SVCERO:

SVCERR:

Goto SVCEX

APPENDEX A - FIRMWARE FLOW CHART DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 10/3/ - 9405603 ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE REV 2 3076 PRODUCTION ONM( 183 of 189 PLN

APPENDEX A - FIRMWARE FLOW CHART (Continued)

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 102=o2 - 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 9409 603D D 2 3076 PRODUCTION 9Z'%' 184 of 189 PLN

APPENDEX A - FIRMWARE FLOW CHART (continued)

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCOR-RADIATION MANAGEMENT 10/3/2 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION .,'Z*f 185 of 189 PLN

APPENDIX B - Microprocessor Block Diagram DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCoR-RADIATION MANAGEMENT 1 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 2 3076 PRODUCTION aW1t 186 of 189 PLN

APPENDIX B - Microprocessor Block Diagram (Continued)

ADORMS DATA amS DATE TrTLE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT 9405603 ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE REV 2 3076 PRODUCTION 9.*4r 187 of 189 94095603SDD PLN

APPENDIX B - Microprocessor Block Diagram (Continued)

DATE T[2LE SOFTWARE DESIGN DESCRIPTION, SYNCOR RADIATION MANAGEMENT I302 9405603 DOC CTRL SHEET NO. SIZE REV ECN NO. RELEASED FOR PIN PRODUCTION 2 S9409S603SDD 3076 ,*?*1( 188 of 189

APPENDIX B - Microprocessor Block Diagram (Continued)

CEBIT VALUE ENTER FUNCTION lE2 PROM SERIAL DATE M , S JPJUMPERARRAY.

"* U y ACCURACY FAIL ALARM INH01l'r

• S*STATISTICAL ENABLE

• AUTO I MANUAL ALARM ACK, FRONTEPANL *oSALARM INDIITI ENABLE CONNECTOR -

DATE TITLE SOFTWARE DESIGN DESCRIPTION, SYNCORRADIATION MANAGEMENT 10 02 9405603 REV ECN NO. RELEASED FOR DOC CTRL SHEET NO. SIZE 3076 PRODUCTION ,%W( 189 of 189 PIN