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1. Technical Manual Data Disc Inc F Series Disc Memory Electronics Manual Program Manual Interdata 29 053 Data Disc Operation and Programming Manual 16 SELECTOR CHANNEL The Selector Channel provides a high speed path from fast devices like the disc to the central computer The Selector Channel controls the input output operation by itself stealing memory cycles when it needs them which allows the central processor to operate concurrently Device Number 7 Speed Maximum 500 K bytes second Reference Program Manual Interdata 29 036 Selector Channel Programming Manual 17 CLOCK The clock provides timing data for the central processor It can be read at any time providing an 8 bit value vhich is stepped every 100 ysec Whenever the 8 bits overflow every 25 6 msec an interrupt occurs Device Number 8 Speed Clock read is immediate no input output delay occurs 18 uoijipi s pjdsig ajoway p upApy Sayy 2 in6ij 19 Figure 8 ARDS Display Sample 20 ARDS ADVANCED REMOTE DISPLAY STATION The ARDS Figure 7 provides displays of complex graphics Figure 8 as well as alphanumerics A keyboard allows entry of data in the 94 character ASCII set onto the storage display tube The tube which stores the image on the screen itself need not be refreshed to retain the image in fact it must explicitly be clear ed to remove old data A mouse allows a user to move the2. Huberman A D Agostino M M Mills J V Sullivan iv other members of the SECTION III TABLE OF CONTENTS LIST OF ILLUSTRATIONS INTRODUCTION HARDWARE GENERAL System Test Set CENTRAL PROCESSOR DISPLAY PANEL TELETYPE MODEL 35 ASR TELETYPE MODEL 33 ASR SOROBAN CARD READER KENNEDY MAGNETIC TAPE MODEL 1400 RH DATA DISC SELECTOR CHANNEL CLOCK ARDS ADVANCED REMOTE DISPLAY STATION MOTOROLA 4300 PRINTER FIRMWARE GENERAL CHANNEL BOOTS DISPLAY PANEL SOFTWARE SUMMARY Firmware Support Software Oriented Interdata Supplied MITRE Software PUSS MI 3 MULTI PLY DIVIDE RGC PUNCHER LOADER CARD TO PAPER TAPE TAPE EDITOR BIBLIOGRAPHY OF NON MITRE DOCUMENTS Figure Number 00 OX ua F C N LIST OF ILLUSTRATIONS Microprogramming Facility System Test Set Display Panel Teletype Model 35 ASR Soroban Card Reader Kennedy Magnetic Tape Model 1400 RH ARDS Advanced Remote Display Station ARDS Display Sample Motorola 4300 Printer vi SECTION I INTRODUCTION The microprogramming facility at MITRE is designed to develop and explore the technology in the relatively new field of micro programming Figure 1 Briefly a microprogrammed computer is one in which the basic control circuitry performs an extremely primitive set of operations much more elementary than the instruction sets of conventional machines By executing sequences of these micro operations stored in a special
3. MOTOROLA 4300 PRINTER This printer Figure 9 is currently the fastest printed output device available on MITRE s 1 3 Data is printed in 80 character lines of 10 point type on continuous form friction feed specially prepared current sensitive paper Device Number D Photograph Figure 9 Speed 300 characters per second Copy 80 characters per 7 2 inch line Spaced 5 lines per inch 6 x 7 dot matrix 5 x 7 per character 1 column for spacing Paper 350 85 wide rolls of current sensitive paper the last 20 1 feet of the roll contains a red warning strip Input Code 7 bit parallel code Character Codes 66 character ASCII CR LF one character Size Printer 16 Wx 9 1 2 H x 13 7 8 D Translator 17 1 2 We 5 376 x 7 1 2 b Weight Printer 40 pounds Translator 17 pounds Power Printer 115V 102 60 2 cps single phase 115 watts Translator 115V 10 60 2 cps single phase 57 5 watts 23 1 4 00 F DlouoloW 6 inBij References Brochure Specification Technical Manual Motorola s Silent Desk Top Non impact Al1 Electronic Lov cost Teleprinter Half Size and Full Sound Motorola Inc Specification for Motorola Inc 25 Motorola s TP4000 Series High Speed Teleprinter 68P85900C11 8000 Series Teleprinter Technical Manual Model 4300 0 A SECTION III FIRMWARE GENERAL The Interdata delivered 1 3 comes equipped with a read on
4. fast memory a firmware program any desired set of conventional machine instructions can be imple mented ITRE s microprogramming facility is based on an Interdata 3 computer the 1 3 Using this basic hardware the 1 3 processor and building microprograms firmware and conventional programs software some of the impact of microprogramming will be explored VENUS now under construction is an experiment using the facility As such it is an operating system which will explore some of the problems of efficient effective large program production using microprogramming to influence the apparent computer architecture It will be documented elsewhere Ayipiop4 BurwwosBoidossiw ainb1j l _ z W s s 3 i i UT T GENERAL SECTION II HARDWARE The hardware consists of an Interdata 3 central processor plus a collection of peripheral devices All of these devices are attached directly to the central processor except the disc which is connected to the selector channel The following equipment is currently installed Device Address Hex 1 2 Device Name Display Panel Teletype Model 35 ASR Teletype Model 33 ASR Soroban Card Reader Kennedy Magnetic Tape Data Disc Selector Channel Clock Not Used ARDS Advanced Remote Display Station Reserved for Future Motorola Printer Motorola Printer Teletype Model 33 ASR Up to 256 devices with addresse
5. General Description Device Descriptions Interdata 29 011 ASR 33 Teletype Operation and Programming Interdata 29 010 Display Panel Programming 32 Interdata Interdata Interdata Loaders Interdata Interdata Assembler Interdata Interdata FORTRAN Interdata Interdata Editor Interdata Debug Interdata Interdata Math Librar Interdata 29 008R62 29 016 29 015 06 025A12 06 030A12 03 001R01A12 03 001M10R014A12 29 014 03 005R01A16 06 008R014A12 03 002R01A12 03 002R01 29 007 Test Programs Tnterdata Interdata 06 004A12 Card Reader Programming Manual High Speed Paper Tape Reader Operation and Programming Auto Load Micro Program Loader Descriptions Bootstrap Programs and Procedures Assembler Manual Operating Instructions for the TAPE Assembler and the CARD Assembler User s Manual for Interactive FORTRAN Operating Instructions for FORTRAN Source Tape Preparator Descriptions Hexadecimal Debug Program Description CLUB Relative Listing of CLUB v output Math Library Abstracts and Descriptions ASR 33 and ASR 35 Teletypevriter Test Program Operating Instructions Teletypevriter Test Program Listing 33 Interdata Interdata Interdata Interdata Interdata Interdata Interdata MICROPROGRAMMING Interdata 06 003RO1A1 2 06 005R01A12 29 053 29 036 29 082 06 038A12 29 033R01 29 021 Interdata Interdata
6. available on the 1 3 is that supplied by the manufacturer This material falls into tvo broad classes having to do vith firmvare or softvare The MITRE produced softvare so far falls into the utility category Firmvare Support Tn support of firmvare program production Interdata supplies 1 An assembler for assembling microprograms It has been modified to accept card instead of paper tape input and to print the output listing on the Motorola printer 2 A simulator ALICE on which to try out programs assembled using the assembler 3 A program ROMWATS to generate a paper tape suitable for wiring a microprogram ROMWATS is in fact not delivered It is used by Interdata to convert output tapes generated by the assembler or the simulator Descriptions of all these programs are contained in Interdata 29 021 Model 3 Microprogramming Reference Manual Software Oriented Interdata Supplied 1 Assembler 2 Loaders 3 Fortran 4 Editor 5 Club debug program 6 Math Library 7 Test programs 28 Most of these features are described in detail in Interdata 29 013 Programming Manual Additional references include 29 082 Editor Tide Program Manual 06 038A12 Card Reader Test Program Operation Manual 29 033R01 Mark 111 Memory Test Program Operation Manual MITRE Softvare 1 PUSS 2 MI 3 3 Multiply Divide 4 RGC Puncher Loader 5 Card to paper tape 6 Tape Editor PUSS PUSS is a stand alo
7. ii T 10 TELETYPE MODEL 33 ASR These teletypes provide user interfaces to the 1 3 They use a standard upper case only ASCII character set to communicate vith the 1 3 using a keyboard and an 8 level paper tape reader and punch Device Number 3 Speed 6 10 characters per second Code 8 level 11 0 unit basis ASCII Tape 8 level l inch wide Copy 72 characters line sprocket feed platen 10 characters inch 6 lines inch Size 22 W x 33 H x 18 D Weight 56 pounds Power 115V 10 60 45 cps single phase synchronous References Brochure Teletype Corp Teletype Model 33 Equipment Program Manual Interdata 29 011 ASR 33 Teletype Operation and Programming Manual 11 Jappay PJDO upqoloS G inBij FADO M30viu MLP P b SOROBAN CARD READER The Soroban card reader Figure 5 reads standard 80 column cards at a rate of up to 250 cards per minute using vacuum feed and photosensing Device Number 4 Photograph Figure 5 Speed 225 cpm maximum picks on demand at any rate Hopper capacity 500 cards hopper replenishable during operation Code Hollerith Cards Standard 80 column Size 23 W x 123 H x 12 D Weight 75 pounds approx Pover 115V 107 60 3 cps References Brochure Soroban Super Compact Card Reader Technical Manual Soroban Technical Manual Soroban Compact Card Reader SCCR Program Manual Interdata 29 008R 2 Card Reader Operation and Pro
8. the display panel is an Input Output device and is programmable at both the micro and conventional programming levels the meanings of the lights and the interpretation of the switches is a function of the operating programs Device Number Photograph Speed Size References Program Manual 1 Figure 3 Data transfer involves no delay except for instruction execution time 19 Wx 14 Hx 2 D Interdata 29 010 Display Panel Programming Manual Section III below leupd4 Aojdsig in6ij EE uu TELETYPE MODEL 35 ASR The Model 35 ASR teletype Figure 4 provides a standard ASCII character set upper case only on a keyboard plus an 8 level paper tape reader and punch This teletype located near the central pro cessor is used primarily by the computer operator to control system operation Device Number Photograph Speed Code Tape Copy Size Weight Power References Brochure Manual Figure 4 10 characters per second 8 level 11 0 unit basis ASCII 8 level 1 ineh wide 72 characters line sprocket feed platen 8 wide 10 characters inch 6 lines inch 40 Wx 385 H x 24 D 225 pounds approx 115V 102 60 5 Teletype Teletype Model 35 Equipment Teletype Bulletin 280B Vol I and II Technical Manual Model 35 Automatic Send Receive Teletype writer Set ASR SV SE l poyy dZi l l g d 44 1
9. 29 005 Logic Module Handbook Interdata 38 007 Data Communications Interdata 38 029 Data Communications Systems Teletype Inc Brochure Teletype Model 35 Equipment Teletype Inc Brochure Teletype Model 33 Equipment Soroban Brochure Super Compact Card Reader Data Disc Brochure F Series Fixed Head Disc Memory Systems Data Disc Interface F Series Disc Memory Input Manual Output Manual Computer Brochure Advanced Remote Display Station Displays Inc Computer RM 86802 Advanced Remote Display Station Displays Inc Reference Manual Motorola Inc Specification Specification for Motorola s TP4000 Series High Speed Teleprinter 31 Motorola Inc Brochure Motorola s Silent Desk Top Non Impact A11 Electronic Lov Cost Teleprinter Half Size and Full Sound TECHNICAL MANUALS Interdata 29 026 Model 3 Digital System Maintenance Manual Vol I Text Interdata 29 027 Model 3 Digital System Maintenance Manual Vol II Drawings Teletype Inc Bulletin 2808 Vol I and II Technical Manual Mode1 35 Automatic Send Receive Teletypevriter Set ASR Soroban Technical Manual Soroban Compact Card Reader SCCR Kennedy Technical Operation and Maintenance Manual Company Manual Model 1400 Incremental Magnetic Recorder Data Disc F Series Disc Memory Electronics Manual Motorola 68P85900C11 TP4000 Series Teleprinter Technical Manual Model 4300 PROGRAMMING Interdata 29 01 3R02 Programming Manual includes Interdata TP111 7 8
10. DESCRIPTIVE NOTES Type of report and inclusive dates N A 5 AUTHOR S First name middie initial last name Robert W Cornelli Ba CONTRACT OR GRANT NO F19 628 68 C 0365 MTR 921 PROJECT NO 7120 9a ORIGINATOR S REPORT NUMBER S 9b OTHER REPORT NO S Any other numbers that may be assigned this report DISTRIBUTION STATEMENT This document has been approved for public release and sale its distribution is unlimited SUPPLEMENTARY NOTES 12 SPONSORING MILITARY ACTIVITY N A Directorate of Planning amp Technology Electronic Systems Division L G Han scom Field Bedford Massachusetts ABSTRACT The microprogramming facility at MITRE is designed to develop and explore the technology in the relatively new field of microprogramming This document describes the facility DD 1473 Security Classification Security Classification 14 LINK A LINK B LINK C KEY WORDS Security Classification
11. DS display RGC PUNCHER LOADER The RGC Puncher Loader are tvo programs vhich allov punching of selected portions of core memory to paper tape and the later reloading of the paper tape back into the original memory locations CARD TO PAPER TAPE The card to paper tape program accepts a deck of punched cards as input and prints and or punches a paper tape in one of tvo formats In either mode records punched on paper tape are variable length with trailing blanks suppressed In 80 column mode up to 80 columns may be punched and cards on tape are separated by LF CR and six rubout characters In 72 column mode columns 73 80 are ignored and no rubout characters are inserted between cards If printing is used in 80 column mode and non blank characters appear in columns 73 80 they will all be printed in column 72 TAPE EDITOR The tape editor allows a user at the operator s teletype station to correct and repunch a source program paper tape The program reads the paper tape either operating one line at a time allowing corrections from the teletype or continuous feed which can be interrupted for occasional changes 30 APPENDIX BIBLIOGRAPHY OF NON MITRE DOCUMENTS GENERAL Data Processing Magazine The Interdata Series February 1968 P J L Wallis Auerbach Info Inc Interdata Brochure Digital Systems Model 2 Model 3 Model 4 Interdata 29 004 Reference Manual Interdata 29 003R01 Systems Interface Manual Interdata
12. Interdata Interdata Interdata Interdata Interdata SYSTEM CHECKOUT Interdata Interdata TP107 5 8 TP108 5 8 29 017R01 05 010A12 TP109 5 8 05 011A12 TP110 5 8 30 254 3 30 254 1 Mark II Memory Test Description Model 3 Test Program Description Data Disc Operation and Programming Manual Selector Channel Programming Manual Editor TIDE Program Manual Card Reader Test Program Operacion Manual Mark 111 Memory Test Program Cperation Manual Model 3 Micro Programming Refereuce Manual includes Introduction to Micro Programming The Micro Programmed Processor Micro Instruction Reference Manual Micro Instruction Assembler Micro Assembler Operations Manual Micro Simulator ALICE Reference and Operator s Manual ROMWATS Description Interdata System Test Set Operation System Test Set Figure 182 34 Interdata Interdata Interdata Interdata 28 001R01B08 35 102R02B03 3 109 3 3 05 006A13 Schematic System Test Set Assembly Printed Circuit Test Set Mod 3 X Rays Mod 3 X Ray Listing 35 Security Classification DOCUMENT CONTROL DATA R amp D Security classification of title body of abstract and indexing annotation must be entered when the overall report is classified 1 ORIGINATING ACTIVITY Corporate author 28 REPORT SECURITY CLASSIFICATION UNCLASSIFIED The MITRE Corporation Bedford Massachusetts 3 REPORT TITLE Microprogramming Facility 4
13. ain ar destroy ESD TR 69 358 MTR 921 MICROPROGRAMMING FACILITY R W Cornelli NOVEMBER 1969 Prepared for DIRECTORATE OF PLANNING AND TECHNOLOGY ELECTRONIC SYSTEMS DIVISION AIR FORCE SYSTEMS COMMAND UNITED STATES AIR FORCE L G Hanscom Field Bedford Massachusetts Project 7120 Prepared by THE MITRE CORPORATION Bedford Massachusetts Contract AF 19 628 5165 This document has been appraved for public release and sale its distribution is un limited FOREWORD This report describes the microprogramming facility at The MITRE Corpora tion Bedford Massachusetts It is in partial fulfillment of Project 7120 under Contract No F19 628 68 C 0365 It was prepared under the cogni zance of Mr Robert W Cornelli of The MITRE Corporation The USAF project monitor is Mr Russell A Meier REVIEW AND APPROVAL Publication of this technical report does not constitute Air Force approval of the report s findings or conclusions It is published only for the exchange and stimulation of ideas WILLIAM F HEISLER Colonel USAF Chief Command Systems Division Directorate of Planning and Technology ii ABSTRACT The microprogramming facility at MITRE is designed to develop and explore the technology in the relatively new field of micro programming This document describes the facility iii ACKNOVLEDGMENT This document contains contributions from microprogramming group notably R G Curtis B 7
14. cursor about the display tube by moving the mouse and pushing one of three buttons to set a point drav a line and terminate In alphanumeric mode 4000 characters 80 per line 50 1ines can be displayed In graphic mode in a y by 8 area 1081 by 1415 addressable points can appear Device Number Photographs Speed Display Area Spot Size Stability Storage Time Erase Time Contrast Ratio Stored Luminance Phosphor Point Addressing A Figures 7 8 2 4 msec character 416 KC 6 by 8 1081 by 1415 addressable points 8 mils nominal adjacent addressable points overlap Stored data is absolutely stable gt 15 minutes 500 ms 5 second 3 1 or greater At least 3 foot lamberts Pl Sign magnitude with absolute coordinate 0 0 at the center of the screen 21 Vector Format Keyboard Screen Symbol Capacity Size Veight Pover References Brochure Reference Manual 22 Sign magnitude relative vectors AX change in X AY change in Y component lengths are O to 1023 increments long 58 keys capable of transmitting the 94 character ASCII set with teletype capability and compatibility 80 symbols per line x 50 lines 4000 characters adjustable 20 W x 19 374 Bp x 32 374 D 120 pounds 115V 60 cycles 5 amps single phase Computer Displays Inc Advanced Remote Display Station Computer Displays Inc RM 86802 Advanced Remote Display Station Reference Manual
15. foo sa ESD ACCESSION LIST b EST fali B Z lt 77777 2 ESD RECORD COPY Copy Ro z of cys RETURN ie AATION DIVISION ESD TR 69 35 SCIENTIFIC amp TECHNICAL INFORM 2 Gj ESTI BU LD NG 24 MTR 921 d l MICROPROGRAMMING FACILITY R W Cornelli NOVEMBER 1969 Prepared for DIRECTORATE OF PLANNING AND TECHNOLOGY ELECTRONIC SYSTEMS DIVISION AIR FORCE SYSTEMS COMMAND UNITED STATES AIR FORCE L G Hanscom Field Bedford Massachusetts ESD RECORD 2 RETURN TO 7 Ic TECHNICAL INFORMATION DIVISION IF SCIENT ESTI BUILDING 1211 Project 7120 Prepared by THE MITRE CORPORATION Bedford Massachusetts This document hos been approved for public releose ond sole its distribution is un limited Contract AF 19 628 5 T ADOLAT When U S Government drawings specifica tions or other data are used for ony purpose other than a definitely related government procurement operotion the government there by incurs na responsibility nor any abligatian whatsoever and the fact that the government may have formulated furnished or in any way supplied the soid drowings specifico tions or other data is not to be regarded by implication or otherwise os in any manner licensing the holder or any other person or corporation or conveying ony rights or per mission to manufacture use or sell any patented invention that may in any way be related thereto Do nat return this copy Ret
16. gramming Manual C HY 004L 1spoW dol l uSoyy Apsuuay 9 aln61j x a ma ux a do 14 KENNEDY MAGNETIC TAPE MODEL 1400 RH Figure 6 This drive reads and vrites standard magnetic tape in 9 track mode at 200 bpi density Device Number 5 Photogra ph Figure 6 Speed 5 inches per second 1 KC Capacity Reel 1200 by x by 1 5 mil computer tape on a 7 reel Data 2 880 000 9 bit 8 plus parity characters per 1200 reel Mode NRZI 200 bpi 9 track internally generated odd vertical and even longitudinal parity Gaps 3 4 record 3 5 file both on command Size 19 W x 12 H x 12 D Weight 50 pounds Power 115V 50 60 cps Reference Technical Manual Kennedy Magnetic Recorder Operation and Maintenance Manual Model 1400 Incremental 15 DATA DISC The disc provides the 1 3 vith half a million bytes of fast access on line storage Device Number 6 Speed Avg Access Time 16 7 ms Rotation 1800 RPM 1 32 3 0 Data Rate 3 0 megabits per second 1 3 3 0 62 5 Ke Capacity 6 4 x 10 bits on 64 tracks or 6 4 million bits 524 288 bytes Addressing By block 128 characters block Size 19 Wx 8 3 4 H x 19 3 4 D Weight 62 pounds Power 120V 102 60 0 5 1 5 eps single phase 8 amp starting current 1 6 amp running current References Brochure Data Disc Inc F Series Fixed Head Disc Memory Systems Interface Data Disc Inc F Series Disc Memory Input Output Manual
17. ly memory ROM which defines the instruction set of the standard 1 3 This ROM locally named Primeval is described in detail in Interdata 29 004 Reference Manual Another ROM called the X ray ROM is provided by Interdata This ROM consists of a set of diagnostic microprograms designed 20 exercise the processor core memory and the peripherals The desc tion and flow chart of this ROM appears in Interdata 3 105 3 Mod 3 X Rays while the listing is in Interdata 095 006A12 Mod 3 7 Ray Listing As a first attempt at microprogramming 3 nev ROM called Calliope vas designed and built In addition to the standard 1 3 instruction set vhich it executes more quickly and using less ROM space than in Primeval Calliope contains code to implement an I O channel a set of program loading code BOOTS and a completely revised handling of the general purpose display panel CHANNEL Calliope provides the user with an input output 1 0 channel which may be used to perform input output operations using count controlled chainable commands to provide a large measure of program independent block transfer capability Operations on a device are initiated with a new instruction start I O channel SIO which identifies the device and points to the first of a series of 1 0 commands Once initiated the 1 0 will proceed independently under control of the chain of commands and a Device Status Word DSW table In addition to the standard 1 0 contr
18. ne utility for punching paper tapes on the 1 3 teletype in a format suitable for loading with BOOTS the absolute Bootstrap loader see above Section III Boots PUSS is self relocating and has facilities for copying itself to any location in core It can be used to generate individual records for a scatter load or it can generate a single data record and a PSW load record at one time MI 3 MI 3 is a machine language assembler to handle 1 3 machine language It is intended to fulfill two purposes which could not be achieved with the standard manufacturer supplied assembler 1 It provides the ability to define new instructions a necessity where microprogramming continually changes the instruction set 29 2 It is designed to run as fast as possible First it operates as a one pass assembler vith the assembled code placed directly in core It may also produce a binary tape but it runs concurrently with its input output Further this output can be suppressed Since it will accept input from the card reader instead of the teletype it can attain optimum card reader speed his means MI 3 can be used as an efficient assembler or a fast loader MULTIPLY DIVIDE Since the hardware firmware multiply divide is not available on the MITRE I 3 the multiply divide program supplies this capability in response to the illegal instruction interrupt It has been used in connection with MI 3 FORTRAN and some software associated with the
19. ol operations and the basic block transfer capability operating under count control any subset of the 128 ASCII characters can be recognized on input in a special way such that they may be omitted and or may be used to terminate the operation 26 BOOTS BOOTS is a simple microprogrammed core loader for the 1 3 BOOTS is capable of loading either punched paper tape from the teletype or cards from the card reader It will perform scatter loads to any part of real memory including the lower registers e g the PSW A continuous display of the address currently being loaded and the loaded contents thereof is generated Software programs to produce paper tapes see PUSS below and cards BOOTRAN in the proper format have been developed DISPLAY PANEL The Display Panel as implemented in Calliope is basically the same as supplied by the manufacturer with some additions 1 The new bootstrap microprogram BOOTS above can be accessed with the device to bootstrap from in the data switches 2 A heretofore unused switch position now labeled MEMA can be used to examine MEMR or modify MEMW storage without affecting the current location counter 3 All sixteen data switches instead of just the last eight can be read under program control 4 All thirty two data display lights instead of just the last eight can be written under program control 27 SECTION IV SOFTWARE SUMMARY Most of the software currently
20. s up to FT hex may be attached System Test Set The System Test Set Figure 2 is an adiunct to the central computer vhich provides manual control of the 1 3 for hardvare test and checkout purposes Photograph Figure 2 Reference Interdata 30 254 System Test Set Operation 19S 1s J U1a1S S Z ainbi4 hb U Laz is aa F Eu ar z r F t ltik z CENTRAL PROCESSOR Memory ROM Main Size Veight Pover References Brochure Article Delivered 1 3 Micromachine Technical Manuals Size 102A 16 bit vords each 2 maximum Speed 370 nsec for 16 bits Size 65K 8 bit bytes byte addressable Speed 1 5 usec for 16 bits 19 W x 105 Hx 14 D 100 pounds includes power supply 115V 102 47 to 63 cps Interdata Digital Systems Model 2 Model 3 Model 4 een Data Processing Magazine February 1968 P J L Wallis Auerbach Info Inc The Interdata Series Interdata 29 004 Reference Manual Interdata 29 021 Model 3 Micro programming Reference Manual Interdata 29 026 Model 3 Digital system Maintenance Manual Vol I Text Interdata 29 027 Model 3 Digital system Maintenance Manual Vol If Drawings D SPLAY PANEL This device Figure 3 is used by the computer operator to control the operation of the central computer A more conventional name might be the operator s console It consists of a set of control switches data bit switches and lights Since
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