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BRL 1964, BRLESC, starting page 0036
 


BRLESC
 Ballistic Research Laboratories Electronic Scientific Computer

MANUFACTURER
Ballistic Research Laboratories


Photo by U.S. Army

APPLICATIONS
Exterior ballistics problems such as high altitude, 
solar and lunar trajectories, computation for the preparation of
firing tables and guidance control data for Ordnance 
weapons, including free flight and guided missiles.

Interior ballistic problems, including projectile, 
propellant and launcher behavior, e.g. physical characteristics of
solid propellants, equilibrium composition and thermodynamic 
properties of rocket propellants, computation of
detonation waves for reflected shock waves, vibration of 
gun barrels and the flow of fluids in porous media.
Terminal ballistic problems, including nuclear, fragmentation 
and penetration effects in such areas as explosion
kinetics, shaped charge behavior, ignition, and heat transfer.

Ballistic measurement problems, including photogrammetric, 
ionospheric, and damping of satellite
spin calculations, reduction of satellite doppler tracking 
data, and computation of satellite orbital elements.
Weapon systems evaluation problems, including antiaircraft 
and anti-missile evaluation, war game proproblems,
linear programming for solution of Army logistical problems, 
probabilities of mine detonations, and lethal area and
kill probability studies of missiles.

PROGRAMMING AND NUMERICAL SYSTEM
Internal number system     Binary
 (2's complement)
Binary digits/word         68 + 1+ parity
Binary digits/instruction  68
Instructions/word           1
Instructions/decoded       44
Arithmetic system          Fixed and floating point
Instruction type           Three-address

BRL 1964, BRLESC, starting page 0037




Photo by U.S. Army
Instruction word format
+-------+-------+-------+-------+-------+-------+-------+-------+
|  4    |   4   |   6   |  14   |   6   |  14   |   6   |   14  |
+-------+-------+-------+-------+-------+-------+-------+-------+
| Order | Para- | Index | a-Ad- | Index | b-Ad- | Index | y-Ad  |
| type  | meter |   a   | dress |   b   | dress |   c   | dress |
+-------+-------+-------+-------+-------+-------+-------+-------+

Number word format Fixed  Point
+-----+------+--------------------------------------------------+
|  3  |  1   | 4              6o                                |
+-----+------+--------------------------------------------------+
| Tag | Sign |   Binary                                         |
|     |      |   Point                                          |
+-----+------+--------------------------------------------------+

Number word format Floating Point
+-----+------+--------------------------------------------------+
|  3  |  1   |  4             52                   |       8    |
+-----+------+--------------------------------------------------+
| Tag | Sign | Binary      Coefficient             |  Biased    |
|     |      | Point                               | Exp of 16  |
+-----+------+--------------------------------------------------+

Registers and B-Boxes
The machine has 63-one microsecond access index registers 
which are also addressable as part of the memory.

The parameter bits of the instruction word are used to 
indicate variations of the basic order type.

All three arithmetic registers are 68-bits. Tag bits 
enter these registers only on the logical instructions 
and the shift instruction if it is cyclic or is a 
Boolean shift. On arithmetic orders, the tag bits are saved 
in a separate three-bit register and the three extra 
bits in the arithmetic registers are used for
checking overflow. Thus the range of numbers in the 
arithmetic unit is -128 <= N <128. Memory position 000 is a
high-speed register.

ARITHMETIC UNIT
                                      Microseconds
Operation                      Excl. Access      Incl. Access
Fixed point add or subtract       1                 5
Fixed or floating multiply       20                25
Fixed or floating divide         60                65
Floating add or subtract          1 to 5            5 to 10
Boolean logic operation           1                 5
Indexing and control             NA                 4 to 9
Construction (Arithmetic unit only)
The arithmetic unit is constructed of standard vacuum tube 
logical packages, with tube driven, crystal diode
logical gating. The arithmetic unit only is constructed 
of 1,727 vacuum tubes of 4 types, 853 transistors of 3
types, 46,500 diodes of 2 types, and 1,600 pulse 
transformers of 1 type.

Arithmetic mode                 Parallel
Timing                          Synchronous
Logical events are controlled by a five-phase clock, 
permitting decisions at 5 megacycles/second.
Operation  Concurrent
Indexing and control will be concurrent with arithmetic operations.
 
BRL 1964, BRLESC, starting page 0038


The IBM 1401 ADDS used as a Photo by U.S. Army satellite system for the BRLESC. Except for arithmetic or Boolean compare instructions, the test overflow instructions with P33 = 1, or any arithmetic order that stores in any index register or stores in the location of the next instruction, the machine always gets its next instruction from the memory while it is doing the previous instruction. If this next instruction is one of the control and indexing orders, it is immediately done, unless it is an input-output order or a test overflow order. If it is done, it proceeds to get another instruction and do it, if possible. Thus almost all of the control and indexing orders can be done concurrently with the arithmetic or logical orders. Only the arithmetic and logical orders require the use of the main arithmetic unit of the machine. All types of input-output orders can be done concurrently with other instructions. Automatic interlocks are provided so as to prevent timing conflict. Reference to a main memory position within the range of either an input or output instruction will halt the computer until the input or output transfer has occurred at that memory position. The computer is released as soon as the transfer of that particular word has been made and does not wait for the entire transfer to be completed. There is no interlock on the index memory when it is used as index registers. As many as five input-output orders can be operating concurrently with computing and with each other. There is a separate trunk for reading cards, punching cards, using drum, and two separate trunks for using magnetic tape and all five of these trunks can operate concurrently. STORAGE No. of Digits/ Cycle Time Medium Words Word Microsec Magnetic Core (Main) 53,248 72 binary 1 Magnetic Core (Index) 63 24 binary 1 Magnetic Drums (Two) 24,576 Magnetic Tapes (Six) No. of units that can be connected 16 Units No. of bits/linear inch/channel 400 Bits/inch Channels or tracks on the tape 16 Track/tape Blank tape separating each record 2.5 Inches Tape speed 150 Inches /Sec Transfer rate 120,000 Chars/sec Start time 6.3 Millisec Stop time 7.6 Millisec Average time for experienced operator to change reel of tape 60 Seconds

BRL 1964, BRLESC, starting page 0039

Physical properties of tape
 Width                               1.0 Inch
 Length of reel                  2,500 Feet
 Composition                         0.43 Magnetic coating
                                     220 Mil
Provision is made for up to 1,048,576 words of high speed memory and system 
can be expanded to 16 tape stations.

INPUT
Medium                 Speed
Card Reader          800 cards/min
Magnetic Tape

OUTPUT
Medium                 Speed
Card Punch           250 cards/min
Magnetic Tape
Peripheral equipment. A single unit that is capable of converting 
alphanumerical characters from cards to tape,
tape to high-speed printer, tape to cards, cards to high-speed printer and 
paper to magnetic tape. An IBM 1401 System has been added.

CIRCUIT ELEMENTS OF ENTIRE SYSTEM
Type            Quantity
Tubes
 5847           6,400
 6197             110
 6C4              110
 6AQ5             220
 Misc              80
 Total          6,920

Diodes
 LD70/CTP309   12,600
 LD71         100,000
 Misc          13,700
Total         126,300 
Transistors
2N697             600
2N1143            240
2N398           1,600
Misc           24,753
Total          27,193

CHECKING FEATURES
Code checking features include stopping on any selected address, the 
display of the contents of any memory cell, the display of normal or 
abnormal conditions, the ability to manually store in any selected 
memory cell, and the ability to transfer control to any part of the 
system. Parity checking is performed in each of the four 17-bit groups
in each word.

POWER, SPACE, WEIGHT, AND SITE PREPARATION
Power, computing system       35 Kw
Power, air conditioner        20 Kw
Space, computing system       Plenum is 30 ft x 40 ft
Space, air conditioner
Chilled water is sent two flights up to computer site to heat exchanger, 
transferring heat from computer closed loop air to closed loop chilled water.
On ground floor, compressor refrigerant absorbs heat from chilled water. An 
evaporative system absorbs heat from refrigerant in a cooling tower.
Compressor located two floors below. Liquid coolant piped upstairs. 
Heat exchanger, computer closed-loop air-to-coolant at computer site, 
and coolant-to-outside air downstairs.

Capacity, air conditioner 25 Tons

 PRODUCTION RECORD
Number of systems produced to date    1
Operational date                      November 1961

COST, PRICE AND RENTAL RATES
The approximate cost is              $3,000,000

PERSONNEL REQUIREMENTS
                    Three 8-Hour Shifts
Supervisors              2
Analysts                 3
Programmers and Coders  18
Clerks                   1
Engineers                2
Technicians              6
No engineers are assigned to the operation of the machhine, but are used 
for development and design of additions to the machine. The technicians 
consult the engineers when a total break-down occurs.

RELIABILITY, OPERATING EXPERIENCE
A high degree of reliability is achieved by utilizing standard logical 
plug-in packages, a ruggedized, long life, driver tube, derated components 
and point-to-point soldered connections, and by changing tubes.

ADDITIONAL FEATURES
A significant digit mode of floating point operations is provided in 
addition to the normalized mode.

INSTALLATIONS
Computing Laboratory, Ballistic Research Laboratories, Aberdeen Proving 
Ground, Maryland




BRL 1964, B260/B270/B280, starting page 0040



BURROUGHS B260/B270/B280
MANUFACTURER
Burroughs Corporation

Burroughs B260 Photo by Burroughs   Corporation

APPLICATIONS
Business data processing applications.

B260 is an improved punched card EDP. The system can combine in a single 
run collating, calculating, summarizing, summary punching and printing 
operations which presently require multiple runs on conventional
punched card equipment.

B270 Financial EDP System provides a combination of MICR, punched. card, 
paper tape and magnetic tape capabilities adaptable for every type of 
financial application. The system can be used for proof and transit,
general-purpose financial accounting, or as a satellite to a larger system.

B280 EDP-System. This syetem combines high-speed magnetic tape units with 
high-speed punched card and paper tape capabilities. It can function as 
a low cost EDP system or as an off-line satellite for large scale
computer systems.

PROGRAMMING AND NUMERICAL SYSTEM
Internal number system            Binary coded decimal
Decimal digits/word               Character machine
Decimal digits/instruction,       12, 6-bit characters
Instructions/word                  3
Instructions decoded              42
Arithmetic system                 Fixed point
Instruction type                  Three address
Number range                      12 character operands
Instruction word format
+-------+-------+-------+-----------+-----------+-----------+
|  1    |   2   |   3   |  4     6  | 7       9 | 10     12 |
+-------+-------+-------+-----------+-----------+-----------+
|  OP   |  M    |  N    |    AAA    |   BBB     |   CCC     |
+-------+-------+-------+-----------+-----------+-----------+
| Oper- | Vari- | Vari- | A-Address | B-Address | C-Address |
| ation | ant   | ant   |           |           |           |
+-------+-------+-------+-----------+-----------+-----------+

Automatic coding  
   Report generators  
   Multiprocessing package  
   Assembler  
   Tape sort generator  
   Utility routines

ARITHMETIC UNIT
          Incl. Stor. Access
             Microsec
Add     10     4 + 4 (M + N) + 5L
Mult    10     3 + 6N + 21MN
Div     10     (M + 1 + M - N)(48 + 6 ON)
Arithmetic mode     Serial
 M & N variants of instruction.
 Add - M & N = number of digits in operands,
 Multiple - M = mumber of digits in multiplicand,
 N = number of digits in multiplier.
 Divide - M = number of digits in dividend,
 N = number of digits in divisor.
Timing                Asynchronous
Operation             Sequential
 Simultaneous program operation with multiprocessing
software.

STORAGE
                 No. of        No. of     Access
                 Characters    Digits     Microsec
Magnetic Core     4,800        4,800       10
Magnetic Tape
No. of units that can be connected      6 Units
No. of chars/linear inch of tape      555.5 Chars/inch
Channels or tracks on the tape          7 Track/tape

BRL 1964, B260/B270/B280, starting page 0041



Burroughs B 270                       Photo by Burroughs Corporation

Blank tape separating each record        0.75 Inches
Tape speed                              90 Inches/sec
Transfer rate                       18,000/50,000 Chars/sec
 Start time                              6.7 Millisec
 Stop time                               7.1 Millisec
 Average time for experienced
operator to change reel of tape         25 Seconds
 Physical properties of tape
 Width                                   0.5 Inches
 Length of reel                      2,400 Feet
Composition                       Heavy-Duty Mylar
The magnetic tape is compatible with the IBM 727, 729, and 7330 tape units. 
Tape rewind speed is 320 inches/second. 
Dual gap read-write heads provide lateral and longitudinal 
parity checking.

INPUT
Medium                Model        Speed
Card Reader           B 122       200 cards/min
Card Reader           B 124       800 cards/min
 (1 or 2 possible in system.
Paper Tape Readers    B 141       500 chars/min
                                1,000 chars/min
 (1 or 2 possible in system). 
Sorter-Reader         B 102/103 1,600 items/min
(Speed for flow mode. 1 possible in system.
The cards are read photo-electrically. 51, 61, or 80 column cards in B 124 
Card Reader, 80 columns only in the B 122 Card Reader. 
Can process MLP cards and post card thicknesses. Cards 
are read serially by character.

OUTPUT
Medium                Model          Speed
Card Punch            B 303       100 cards/min
Card Punch            B 304       300 cards/min
 (1 punch available in system.
Line Printer          B 321
 Single space                     700 lines/min
 Double space                     650 lines/min
(2 printers available in system.
Multiple Tape Lister  B 322     1,565 lines/min
(2 listers available/system).
Paper Tape Punch      B 341       100 chars/min
(1 available in system.
The above listed peripherals use buffered operation permitting independent 
operation. The Line Printer Buffer is loaded in 1.3 millisec. 
The Multiple-Tape Lister Buffer is loaded in 0.7 millisec. 
All other units use buffers located in the processor.

The Line Printer carriage skip speed is 25 to 40 inches/second controlled 
by a 12-channel punched carriage tape. The horizontal spacing is 
10 chars inch, the vertical spacing is 6 or 8 lines/inch.

The paper tape used is 5, 6, 7, or 8 level tape. Any code may be translated.

CIRCUIT ELEMENTS OF ENTIRE SYSTEM
 Type                   Quantity
Tubes                       0
Magnetic Cores          5,044 (Usable)

CHECKING FEATURES
Fixed Core - each character checked for parity. 
Magnetic Tape - lateral and longitudinal parity check. 
Card Reader - validity check on all characters. 
Printer - parity and sychronization check. 
Card punch - hole and row count check. 
Paper Tape Reader - parity check on all characters. 
Paper Tape Punch - Validity check.

POWER, SPACE, WEIGHT, AND SITE. PREPARATION
Power, computer system      13.4 - 36.0 KVA
 Dependent on system configuration.
Volume, computer system    247 - 2,076 cu ft
Area, computer system       59 - 423 sq ft
Room size
             23 ft 6 in x 20 ft 6 in to 27ft 6 in x 27 ft 9 in
Floor loading               30 lbs
                           500 lbs concen max
Capacity, air conditioner    2.7 - 7.5 Tons
Weight, computer system  6,073 - 14,190 lbs
Site preparation requirements
Temperature range         - 72o F, + 8 - 7oF.
Relative Humidity         - 50% + 10%
The data processing rooms should be of adequate size to functionally layout 
the system units to achieve optimum operating efficiency.


BRL 1964, B260/B270/B280, starting page 0042



Burroughs B 280                     Photo by Burroughs Corporation

PRODUCTION RECORD
Number produced to date         278
Number in current operation     278
Number in current production    200
Number on order                 200
Anticipated production rate      18/month
Time required for delivery       3 to 6 months

RELIABILITY, OPERATING EXPERIENCE
A complete checking and testing of the equipment is made before release to 
the customer. The system is deigned for easy maintenance. 
Completely equipped and educated field engineering personnel for preventive
maintenance and support.

                     COST, PRICE AND RENTAL RATES

COMPONENTS OF BASIC SYSTEM COST OF COMPONENTS B-260 B-270 B-280 B260/B27O/B28O Processor $ 51,000 $ 56,100 $ 55,475 B124 Card Reader 15,200 15,200 15,200 B304 Card Punch 27,000 27,000 27,000 B321 Line Printer 49,800 49,800 49,800 TOTAL $ 143,000 $ 148,100 $ 147,475 Additional equipment.: B102/B103 Sorter-Reader 68,000 B341 Paper Tape Punch 9,500 B122 Card Reader 8,800 B303 Card Punch 18,000 B322 Multiple Tape Lister 66,400 B421 Magnetic Tape 26,600 B141 Paper Tape Reader 16,800
MONTHLY RENTAL COST B-260 B-270 B-280 B260/B270/B280 Processor $ 1,500 $ 1,650 $ 1,585 B124 Card Reader $400 B304 Card Punch 650 B321 Line Printer 1,200 2,250 2,250 2,250 TOTAL $ 3,750 $ 3,900 $ 3,835 Additional equipment: B102/B103 Sorter-Reader $ 2,000 B322 Multiple Tape Lister 1,600 B122 Card Reader 220 B421 Magnetic Tape 700 B341 Paper Tape Punch 190 B303 Card Punch 450 B141 Paper Tape Reader 400

BRL 1964, B260/B270/B280, starting page 0043




COMPONENTS OF SYSTEM MAINTENANCE SERVICE CONTRACTING 0-36 mos. 37-72 mos. 73-108 mos. B260/ Processor $ 90 $ 96 $ 102 B270 Processor 95 102 109 B280 Processor 90 96 102 B124 Card Reader 90 96 102 B304 Card Punch 90 96 102 B321 Line Printer 150 160 170 B102/B103 Sorter-Reader 450 482 516 B122 Card Reader 35 38 41 B303 Card Punch 55 59 63 B322 Multiple Tape Lister 255 273 291 B421 Magnetic Tape Unit 130 139 148 B141 Paper Tape Reader 60 64 68 B341 Paper Tape Punch 30 32 34 PERSONNEL REQUIREMENTS One 8-Hour Two 8-Hour Three 8-Hour Shift Shifts Shifts Supervisors 1 2 3 Analysts 3 3 4 Programmers 3 4 5 Clerks 1 1 1 Operators 1 2 3 Engineers 1 2 3 Technicians 1/2 3/4 1 In-Output Oper. 1 2 2 Training is made available by the manufacturer to the user. ADDITIONAL FEATURES AND REMARKS Outstanding features include multiprocessing through use of software routine supplied by Burroughs, ease of programming, compatibility with other systems, dual readers and printers, proven performance and less time per job. FUTURE PLANS The new B263/B273/B283 Series will feature faster operation, new commands, high-speed tapes, data communications, disk file, supervisory printer, and a larger memory to be available early in 1964.


BRL 1964, B263/8273/B283, starting page 0044


BURROUGHS B263/8273/B283

MANUFACTURER
Burroughs Corporation

APPLICATIONS
Business data processing applications.

PROGRAMMING AND NUMERICAL SYSTEM
Internal number system        Binary coded decimal
Characters/word               One
Characters/instruction        12
Instructions decoded          54
Arithmetic system             Fixed point
Instruction type              Three address
Number range                  12 character operands
Instruction word format
+-------+-------+-------+-----------+-----------+-----------+
|  1    |   2   |   3   |  4     6  | 7       9 | 10     12 |
+-------+-------+-------+-----------+-----------+-----------+
|  OP   |  M    |  N    |    AAA    |   BBB     |   CCC     |
+-------+-------+-------+-----------+-----------+-----------+
| Oper- | Vari- | Vari- | A-Address | B-Address | C-Address |
| ation | ant   | ant   |           |           |           |
+-------+-------+-------+-----------+-----------+-----------+

Automatic coding  
   Report generators  
   Multiprocessing package  
   Assembler  
   Tape sort generator  
   Utility routines

ARITHMETIC UNIT
          Incl. Stor. Access
             Microsec
Add     7     4 + 4 (M + N) + 5L
Mult    7     3 + 6N + 21MN
Div     7     (M + 1 + M - N)(48 + 6 ON)
Arithmetic mode     Serial
 M & N = M & N variants of instruction. L = the longer of the two.
 Add - M & N = number of digits in operands,
 Multiple - M = mumber of digits in multiplicand,
 N = number of digits in multiplier.
 Divide - M = number of digits in dividend,
 N = number of digits in divisor.
Timing                Asynchronous
Operation             Sequential
 Simultaneous program operation with multiprocessing
software.

STORAGE
                 No. of        No. of     Access
                 Characters    Digits     Microsec
Magnetic Core     4,800        4,800       7
              or  9,600     or 9,600
Magnetic Tape
No. of units that can be connected      6 Units
No. of chars/linear inch of tape      555.5 Chars/inch
Channels or tracks on the tape          7 Track/tape
Blank tape separating each record       0.75 Inches
Tape speed                             90 or 120 Inches/sec
Transfer rate
                      18,000; 50,000; 24,000; 66,600 Chars/second
 Start time                            6.7 - 6.8 Millisec
 Stop time                             7.1 - 4.2 Millisec
 Average time for experienced
operator to change reel of tape       25 Seconds
Physical properties of tape
 Width                                 0.5 Inches
 Length of reel                    2,400 Feet
Composition                         Heavy-Duty Mylar
The tapes are IBM compatible. Tape rewind speed is 320 inches/sec. Dual gap 
read-write heads provide lateral and longitudinal parity checking. 
Binary read and write is used.

INPUT
Medium                 Model        Speed
Card Reader           B 122        200 cards/min
Card Reader           B 124        800 cards/min
 (1 or 2 possible in system).
Paper Tape Readers    B 141        500 chars/min
 1  000 chars/min
 (1 or 2 possible in system .
Sorter-Reader         B 102-103  1,600 items/min
 (Speed for flow mode. 1 possible in system).
The cards are read photo-electrically. 51, 61, or 80 column cards 
in B 124  Card Reader, 80 columns only in the B 122 Card Reader. 
Can process MLP cards and post card thicknesses. Cards 
are read serially by character.

OUTPUT
Medium                  Model     Speed
Card Punch              B 303      100 cards/min
Card Punch              B 304      300 cards/min
    (1 punch available in system).
Line Printer            B 321
                      Single space 700 lines/min
                      Double space 650 lines/min
   (2 printers available in system).
Multiple Tape Lister    B 322    1,565 lines/min
   (2 listers available/system).
Paper Tape Punch        B 341      100 chars/min
(1 available in system).

The above listed peripherals use buffered operation permitting independent 
operation. The Line Printer Buffer is loaded in 1.3 millisec. 
The Multiple-tape Lister Buffer is loaded in 0.7 millisec. All other units 
use buffers located in the processor.

The Line Printer carriage skip speed is 25 to 40 inches/sec. controlled by 
a 12-channel punched carriage tape.

The horizontal spacing is 10 chars inch, the vertical spacing is 6 or 8 
lines/inch.

The paper tape used 5, 6, 7, or 8 level tape. Any code may be translated.

CIRCUIT ELEMENTS OF ENTIRE SYSTEM
 Type                Quantity
Tubes                     0
Magnetic Cores        9,844 (Usable)

CHECKING FEATURES
Fixed Core - each character checked for parity. 
Magnetic Tape - lateral and longitudinal parity check. 
Card Reader - validity check on all characters. 
Printer - parity and sychronization check. 
Card punch - hole and row count check. 
Paper Tape Reader - parity check on all characters. 
Paper Tape Punch - Validity check.


BRL 1964, B263/8273/B283, starting page 0045


    POWER, SPACE, WEIGHT, AND SITE. PREPARATION
    Power, computer system                13.4 - 36.0 KVA
     Dependent on system configuration.
    Volume, computer system              247 - 2,076 cu ft
    Area, computer system                 59-- 423 sq ft
    Room size
                        23 ft 6 in x 20 ft 6 in to 27 ft 6 in x 27 ft 9 in
    Floor loading                         30 lbs
                                         500 lbs concen max
    Capacity, air conditioner              2.7 - 7.5 Tons
    Weight, computer system            6,073 - 14,190 lbs
    Site preparation requirements 
    Temperature range - 72o F, + 8 - 7o F.
    Relative Humidity - 50% + 10%
    The data processing rooms should be of adequate size to functionally 
	layout the system units to achieve optimum operating efficiency.

    PRODUCTION RECORD
    Scheduled for delivery in 1964

    PERSONNEL REQUIREMENTS
                       One 8-Hour  Two 8-Hour Three 8-Hour
                       Shift       Shifts     Shifts
    Supervisors        1           2          3
    Analysts           3           3          4
    Programmers        3           4          5
    Clerks             1           1          1
    Operators          1           2          3
    Engineers          1           2          3
    Technicians        1/2         3/4        1
    In-Output Oper     1           2          2
    Training is made available by the manufacturer to the user.

    RELIABILITY, OPERATING EXPERIENCE
    A complete checking and testing of the equipment is made 
      before release to the customer. The system is designed 
      for easy maintenance.


COST, PRICE AND RENTAL RATES
COMPONENTS OF BASIC SYSTEM COST OF COMPONENTS B263/B273/B283 Processor $ 54,400 $ 62,900 $ 62,475 B124 Card Reader 15,200 15,200 15,200 B303 Card Punch 27,000 27,000 27,000 B321 Line Printer 44,800 49,800 49,800 --------- -------- -------- TOTAL $ 146,400 $ 154,900 $154,475 Additional equipment same as B260/B 270/B280 listed below: B102/B103 Sorter-Reader - B341 Paper Tape Punch $ 68,000 -9,500 B122 Card Reader - B303 Card Punch 8,800 - 18,000 B322 Multiple Tape Lister - B 421 Magnetic Tape 66,400 - 26,600 B141 Paper Tape Reader 16,800 - PLUS the following: B495 Supervisory Printer $ 15,200 B422 Magnetic Tape Unit (max. 6) 33,200 B466 Additional 4,800 character memory 18,700
MONTHLY RENTAL COST
B263/B273/B283 Processor $ 1,600 $ 1,850 $ 1,785 B124,B304,B321 Card Reader/Card Punch/Line Printer $400/650/1,200 2,250 2,250 2,250 ----- ----- ----- $ 3,850 4,100 4,035 Additional equipment same as B260/B270/B280 listed below: B102/B103 Sorter-Reader - B322 Multiple Tape Lister $ 2,000 1,600 13122 Card Reader - 13421 Mag. Tape 13341- Paper Tape Punch 220 700 190 13303 Card Punch- 13141 Paper Tape Reader 450 400 PLUS the following: B495/B422/B466 Supervis. Printer/Mag. Tape Unit/Addit. Memory 400 800 550
MAINTENANCE SERVICE CONTRACTING 0-36 mos. 37-72 mos. 7--108 mos.
B263/B273/B283 Processor $ 93/107/100 $100/115/107 $107/123/115 B124 Card Reader 60 64 68 B304 Card Punch 90 96 102 B321 Line Printer 150 160 170 B102/B103 Sorter-Reader 450 482 516 B122 Card Reader 35 38 41 B303 Card Punch 55 59 63 B322 Multiple Tape Lister 255 273 291 B421 Magazine Tape Unit 130 139 148 B141 Paper Tape Reader 60 64 68 B341 Paper Tape Punch 30 32 34 PLUS the following: B495 Supervisory Printer 30 32 34 B422 Magnetic Tape Unit 125 134 143 B466 Additional 4,800 Memory 16 17 20
ADDITIONAL FEATURES AND REMARKS Outstanding features include multiprocessing through use of software routine supplied by Burroughs, ease of programming, compatibility with other systems, dual readers and printers, proven performance and less time per job. The system contain all the advantages of the B 260, B 270, and B 280, plus larger core memory, increased speed, added or modified instructions, higher tape speed, disk file, data communication, supervisory printer and overseas compatibility. FUTURE PLANS Data Communications and Disk File abilities early in 1964.


BRL 1964, BURROUGHS B5000, starting page 0046





    BURROUGHS B5000

    MANUFACTURER
    Burroughs Corporation


    Photo by Burroughs Corporation

    APPLICATIONS
    General purpose computing, on-line and real-time uses.
    Scientific and data processing applications. Capable of trap 
    or interrupt on receipt of external signal.
    Second processor module optional for true parallel processing. 
    Either or both processors will time-share two or more relocatable, 
    segmented programs using relocatable data storage areas. 
    Simultaneous read-writecompute on two or more channels; 
    read-compute or writecompute possible on one channel.

    PROGRAMMING AND NUMERICAL SYSTEM
    Internal number system      Binary coded decimal
    Decimal digits/word         48 +1 (parity)
    Decimal digits/instruction  12 (word or char. mode)
    Instructions/word            4
    Instructions decoded        54 (word or char. mode)
     7 for control state under Master Control Program.
    Arithmetic system           Floating point
    39 bit coefficient, 6 bit exponent, 1 bit coefficient, 
     1 bit exponent, 1 flag bit.
    Fixed point                 39 bits/word
    Other,floating point coefficient represented same as 
    fixed point number, made possible by signed exponent.
    Same arithmetic orders (except divide) are used for fixed 
    and floating numbers. Double precision operation codes.

    Instruction type
    The B-5000 may be likened to a zero-address system, 
    i.e. the instructions are independent of storage addresses.

    Operations are performed on contents of stack registers. 
    6-bit repeat field in character mode, 10-bit data or
    operational field in word mode.
    Number range
    Fixed point - (1- 2-39) to (239- 1)
     Floating point 8 -51 < n < 8 +76
    Instruction word format
    Word Mode (4 instructions/word)
   +-------------+-----------+-----------+-----------+
   | Inst No. 1  | No. 2     | No. 3     |  No. 4    |
   +---------+---+-------+---+-------+---+-------+---+
   | 10 Bits | 2 |   10  | 2 |    10 | 2 |    10 | 2 |
   +---------+---+-------+---+-------+---+-------+---+
   |     a   | b |     a | b |     a | b |     a | b |
   +---------+---+-------+---+-------+---+-------+---+
    a - OP Code or Data Literal
    b - Syllable Type Code:  
         00 - Operator  
         01 - Literal  
         10 - Operand Call  
         11 - Descriptor Call


BRL 1964, BURROUGHS B5000, starting page 0047





    Photo by Burroughs Corporation

    Character Mode (4 instructions/word)
    +-----------------+-----------------+-----------------+-----------------+
    | Inst. No. 1     | Inst. No. 2     | Inst. No. 3     | Inst. No. 4     |
    +-----------------+-----------------+-----------------+-----------------+
    | 6 Bits | 6 Bits | 6 Bits | 6 Bits | 6 Bits | 6 Bits | 6 Bits | 6 Bits |
    +-----------------+-----------------+-----------------+-----------------+
    |   a    |   b    |   a    |   b    |   a    |  b     |   a    |  b     |
    +-----------------+-----------------+-----------------+-----------------+
    a - Repeat or Count Field
    b - OP Code

    Automatic built-in subroutines
       BCD to binary conversion, in either direction.
       No fixed point to floating point conversion routines
    in either direction required.

    Automatic coding
    Master control program (MCP) on required drum is
    partially loaded to core at start. This routine
    schedules jobs automatically to maximize system produc-
    tivity (unless over-ridden by an optional priority.)
    Time-sharing programs in CPU when possible. True
    parallel processing possible through MCP with optional
    second processor. MCP handles all interrupt con-
    ditions and makes ALGOL-60 or COBOL compilers avail-
    able. For multi-processing (time sharing), segments
    from any independent programs may be in core simul-
    taneously. Jobs need not be specifically programmed
    for multi and/or parallel processing.

    Registers and B-Boxes
    No Index Registers required by internal logic of
    processor. A + B registers in stack are used during
    arithmetic computation. 13 more registers (per
    processor) are used for instruction address, character
    and bit position, etc.
    Items in data arrays are obtained and stored through
    use of data descriptor containing base address of
    array, incremented by array subscript. A check
    occurs to insure that items are fetched from or
    stored within the limiting array addresses. Pro-
    gramming is not required for the feature.

    ARITHMETIC UNIT
                  Incl. Stor. Access   Excl. Stor. Access
                  Microseconds         Microseconds
              Fixed Pt. Floating Pt.   Fixed Pt. Floating Pt.
    Add       9 (Avg)        13          2           4
    Mult     30 (Avg)         -         19           -
    Div      61 (Avg)         -         20           -
    Construction (Arithmetic unit only)
    Solid-state logic in processors, including registers.
    Arithmetic Mode       Serial (by 6-bit BCD char)
    Arithmetic Mode       Parallel
    Addition or subtraction in serial BCD mode when
    character operation is used.
    Parallel (binary) arithmetic in word mode.
    Timing                Synchronous
    Operation             Sequential
    Concurrent (via optional second processor)

    STORAGE
                      No. of        No. of Access
    Medium            Words/Unit    Bits/Word           Microsec
    Magnetic Drum      32,768       48 + 6 (parity)      8,500 (Avg)
    (1 unit requred, 2d unit optional)
    Coincident Current  4,096       48 + 1 (parity)          3
    Magnetic Core (1-8 units)
    Magnetic Tape
     No. of units that can be connected        16 Units
     No. of chars/linear inch                 555.50 Chars/inch
     Channels or tracks on the tape             7 Track/tape
    

BRL 1964, BURROUGHS B5000, starting page 0048





    Magnetic tape (cont'd)
    Blank tape separating each record     0.75 Inches
    Tape speed                          120 Inches/sec
    Transfer rate                    24,000/66,667 Chars/sec
     Start time                           5 Millisec
     Stop time                            5 Millisec
     Average time for experienced
    operator to change reel of tape      25 Seconds
     Physical properties of tape
     Width                                0.5 Inches
     Length of reel                   2,400 Feet
     Composition
                  Accetate or mylar base, iron oxide coating.
    The magnetic tape is compatible with IBM 727, IBM 729, 
    and IBM 7330 units. Four drum lockout switches,
    provided, each protecting 4,096 words on drum storage unit. 
    Read-write rate of drum is 8.1 microsec/char.
    Tape rewind speed is 320 inches/second. Dual gap read-write 
    heads provides lateral and longitudinal parity checking.

    INPUT
     Medium           Model    Speed
     Punched Cards     B122    200 cards/min
     Punched Cards     B124    800 cards/min
    1 or 2 possible in system; 1 required (Immediate
    access clutch).
    Paper Tape         B141    500 or 1,000 chars/min
    1 or 2 possible in system. (Total 3 for reader and punch).
    Cards are read photoelectrically. 51, 61, 66 or 80 column 
    cards may be read on the 800 cards/min. reader, only
    80 column cards may be read on the 200 cards minute model. 
    Can process MLP cards and postcard thickness.
    Immediate access clutch maintains high rate of speed. 
    Character validity check on reader under operator control.
    Cards are read serially by columns and readers will accept 
    column binary cards. Two 6-bit BCD characters/column.

    OUTPUT
    Medium             Model    Speed
    Punched Cards       B304    300 cards/min
    Punched Cards       B303    100 cards/min
     1 punch optional in system. Immediate access clutch.
    Line Printers               700 lines/min single space
                    or          650 lines/min double space
     Up to 2 printers optional in system, 120 chars/line.
    Supervisory Printer          10 chars/sec (Approx)
     1 required (with console).
    Plotter                       8-20 points/sec
    1 optional in system 10" max. ordinate scale.
    Optional grid printing. Variable absissa scale.
    Paper Tape          B341     100 chars/min
    1 or 2 possible in system. (Total of 3 for reader and punch .
    Line printer carriage skip speed 25 - 40 inches/sec 
     controlled by 12 channel punched paper carriage tape.
    Immediate access print cycle when buffer is filled.
    Horizontal spacing of line printer is 10 chars/inch, 
    vertical spacing either 6 or 8 lines/inch. Printer is buffered,
    requiring I/0 channel only 1.5 millisec for buffer transfer.

    CIRCUIT ELEMENTS OF ENTIRE SYSTEM
     Type            Quantity
    Tubes                 0
    Diodes          100,000 (Approx)
    Transistors      11,000 (Approx)
    Magnetic Cores    4,096 x 49 cores/module
    The above values are for a system consisting of:  
    1 Processor  
    2 Input/Output Channels 
    4 Memory Modules

    CHECKING FEATURES
    FIXED: Core - 1 bit/word parity check.
           Punch - checks characters punched.
           Tape - lateral and longitudinal parity check.
           Reader - alphabetical character validity  
                   check under operator control.
           Printer - drum synchronization check. 
    OPTIONAL: DP and blank column detection on card punch. 
            Punch validity check compares holes punched on 
            modulo 8 basis and row count.
    Master control program recognizes various interrupt 
    conditions, both processor dependent and processor
    independent. Job will be pulled with restart proocedures 
    when necessary, if programmer has not specified a
    possible optional procedure.
  
    POWER, SPACE, WEIGHT, AND SITE PREPARATION
                                Minimum Medium Maximum
    Power, computer     KVA        29      59       103
    Area, computer       sq ft    625     900     1,600
    Floor loading       lbs sq ft  40
     (Caster load) lbs concen max                   500
    Capacity, air conditioner, Tons 6      12        21
    Weight, computer     lbs   12,000  20,000    29,000  
                               (Small) (Medium) (Large)
    Site preparation requirements.
    The B5000 should be installed in a free access floor,
      otherwise trenches are required.
    If a raised floor is utilized, it should also function as a cooling medium.
    A false ceiling serves as an ideal method to conceal return duct work.
    The customer furnishes and installs a main power disconnect 
    near the power supply cabinet.

    PRODUCTION RECORD
    Number produced to date      12
    Number in current operation  12
    Number on order              24
    Anticipated production rates  2/month
    Time required for delivery    9 to 12 months

    COST, PRICE AND RENTAL RATES
    MODEL IDENTITY OF ITEM                      PURCHASE
    B5000 Processor Module                     $ 265,600
    B5282 I/0 Channel Subsystem (1 I/0 chan.)     93,375
     (Maximum 4)
    B 460 Memory Module (Maximum 8)               51,875
    B 430 Storage Drum (Maximum 2)                70,550
    B 122 Card Reader                              8,800
    B 124 Card Reader                             15,200
     Additional Equipment
    B 422 Magnetic Tape Transport (each)          33,200
     (Maximum of 16)
    B 303 Card Punch                              18,000
    B 304 Card Punch                              27,000
    B 321 Line Printer (Maximum of 2)             49,800
                                              MONTHLY RENTAL
    B5280 Processor Module                         6,400
    B5282 I/0 Channel Subsystem                    2,250
    B 460 Memory Module                            1,250
    B 430 Storage Drum                             1,700
    B 122/B124 Card Reader                           220/400
                                           TOTAL $11,820 12,000
  

BRL 1964, BURROUGHS B5000, starting page 0049

 
                                                MONTHLY RENTAL
    B 422 Magnetic Tape Unit                        $ 800
    B 303 Card Punch                                  450
    B 304 Card Punch                                  650
    B 321 Line Printer                              1,200
             MAINTENANCE AGREEMENT RATES $/MONTH
                                    0-36 mo. 37-72 mo. 73-108 mo.
    B5280 Processor Module A        $ 180     $ 193     $  206
    B5282 1/0 Channel                  80        86         92
    B 460 Memory Module                45        48         51
    B 430 Storage Drum                 50        53         56
    B 122 Card Reader                  35        38         41
    B 124 Card Reader                  60        64         68
    B 422 Magnetic Tape               125       134        143
     Transport
    B 303 Card Punch                   55        59         63
    B 304 Card Punch                   90        96        102
    B 321 Line Printer                150       160        170
    B5281 Processor Module B          105       112        119

    PERSONNEL REQUIREMENTS
    Requirements in this area are felt to be largely 
    application-dependent. It is believed that fewer programmers will
    be required to maintain a full "load" on the equipment, 
    because of working at the problemoriented language level.
    Due to scheduling and supervision of the physical system 
    by the master control program, on a large configuration
    fewer operating personnel may be required.

    Training is made available by the manufacturer to the 
    user includes a system survey course; B 5000 COBOL,
    B 5000 ALGOL-60, and a systems operating course.
    Machine language programming classes are not contemplated  
    for users in general, since virtually all programming
    and debugging will be at the problem-oriented language level.

    FUTURE PLANS
    Use of 800 character/inch tape likely to maintain 
    compatibility with other systems.
    Look-ahead fetch of next program word during execution 
    of last program syllable of a word.
    Disk file subsystem will be available in 1964.

    RELIABILITY, OPERATING EXPERIENCE
    Unit design contains features from defense computer 
    systems, whose reliability and availability specifications are
    extremely high even for military equipment.
    All electronic package types and connectors were tested 
    exhaustively for proper operation and life under severe
    environmental conditions, including shocks, vibration, 
    and corrosive atmosphere.
    Automatic wire-wrap on back - plane assures consistent, 
    dependable connections.
    System modularity allows a defective I/0 channel, Processor, 
    or Memory to be switched off-line. System operation
    continues although at reduced speed, but no re-programming is required.

    ADDITIONAL FEATURES AND REMARKS
    Polish notation is used for computational logic facilitates 
    manipulation of operands in stack. Stack logic is a
    relative addressing method, providing automatic allocation 
    of intermediate storage. System features use of
    problem-oriented language and an integrated hardware-software 
    approach, with MCP (master control program for
    system scheduling and efficiency).
    High program density in core storage. Maximum utilization of 
    physical system (I/0 and processor). Physical
    system is capable of expansion or contraction (over and
    above minimum requirement) without reprogramming.
    Programs and data fully relocate and independent of 
    core storage. Any I/0 channel available is usable by an I/0
    device.
    Standard precautions for core of magnetic tape 
    including temperature and humidity control and vertical 
    storage in plastic cases on racks. Tape files are 
    labelled at beginning for interrogation and recognition by programs.

    TYPICAL BURROUGHS B 6000 SYSTEM
    one processor                six magnetic tape transports
    one memory module            one high speed card reader
    one input/output channel     one card punch
    one magnetic drum            one wideline printer
     console keyboard with message printer

    MAXIMUM BURROUGHS B 5000 SYSTEM
    two processors                sixteen magnetic tape transports
    eight memory modules          two high speed card readers
    four input/output channels    one card punch
    two magnetic drums            two wideline printers
     console keyboard with message printer
 



BRL 1964, BURROUGHS D210, starting page 0050
 

    BURROUGHS D210

    MANUFACTURER
    Burroughs Corporation


    Photo by Burroughs Corporation

    APPLICATIONS
    Real-time, general purpose, control computer, for aircraft, 
    missile and satellite navigation and control applications.

    PROGRAMMING AND NUMERICAL SYSTEM
    Internal number system          Binary
    Binary digits/word              24
    Binary digits/instruction       16
    Instructions/word
                     Not a homogeneous memory.
    Instructions decoded            48
    Arithmetic system               Fixed-point
       (Two's complement).
    Instruction Type                One address
    Number range (integer) 223 - 1 to -223 + 1
    Instruction word format
    +-----------+---------+---------+
    | 1       5 |     6   | 7    16 |
    +-----------+---------+---------+
    | Operation | Variant | Operand |
    | Code      | Bit     | Address |
    +-----------+---------+---------+
    Automatic built-in subroutines include multiplication, 
     division, priority interrupt enter, interrupt return.
    Automatic coding Interpreter

    Registers and B-Boxes 
       16 (stored in data memory)

    ARITHMETIC UNIT
                Incl. Stor. Access     Excl. Stor. Access
                Microsec               Microsec
    Add                30                20
    Mult              580
    Div               680
    Construction (Arithmetic unit only)
       Vacuum-Tubes         0
       Transistors        275
       Diodes           1,400
       Magnetic Cores     800
       Resistors        1,000
    Arithmetic mode         Parallel
    Timing                  Synchronous

     STORAGE
                     No. of     No. of    Access
                     Words      Digits    Microsec
    Magnetic Core     256 to     24       10
     (Ferrite)(DRO) 1,024
    Magnetic Core   1,024 to     16       10
     (Rope)(NDRO)  16,384
     Magnetic Core    256 to     24       10
     (Rope)(NDRO)   1,024


    

BRL 1964, BURROUGHS D210, starting page 0051
    


    Photo by Burroughs Corporation

    INPUT
         Medium 
    Paper Tape 
    Discrete Data Chanels

    OUTPUT
         Medium 
    Paper Tape 
    Discrete Data Channels

    CIRCUIT ELEMENTS OF ENTIRE SYSTEM
    Type          Quantity      Remarks
    Tubes                0
    Diodes           2,736      5294, TND2020
    Transistors        883      2N995, 2N2297, 2N1084
    Magnetic Cores   2,409      4-79 Molypermalloy
    Component type numbers given are the closest commercial equivalent 
    to the parts used. Burroughs specifications are used for all components.

    CHECKING FEATURES
    Programmed confidence check is automatic and programmed 
    diagnostic routines are available.

    POWER, SPACE, WEIGHT, AND SITE PREPARATION
    Power, computer       0.1 Kw
    Volume. computer      0.6 cu ft
    Weight, computer     35 lbs
    Site preparation requirements
    An air-conditioner is not required.
    The power requirement varies with the clock rate.

    PRODUCTION RECORD
    Number produced to date        1
    Number in current operation    1
    Number in current production   1

    ADDITIONAL FEATURES AND REMARKS
    Outstanding features include and extensive use of magnetic 
    logic to reduce component count, especially semiconductors; 
    very high calculated reliability; environmentally hardened; 
    and the power consumption varies with the clock rate which 
    can be controlled by the programmer.

    


BRL 1964, BURROUGHS D825, starting page 0052
 


    BURROUGHS D825

    MANUFACTURER
    Burroughs Corporation

    
    Photo by Burroughs Corporation

    APPLICATIONS
    The system is a totally modular system featuring functionally 
    independent computer, memory, and input-output
    control modules which are interconnected to form a flexible 
    system capable of both multi-and-parallel processing.
    Each type of module can be utilized in various quantities 
    of one, two, four, etc. up to sixteen depending on the
    particular type.

    System is designed for use in scientific 
    and cormercial data processing, and real time
    applications as exemplified by large scale, command and control
    problems, communications store/forward and switching.

    PROGRAMMING AND NUMERICAL SYSTEM
    Internal number system          Binary
    Binary digits/word              49
    Binary digits/instruction       49
    Instructions/word               Variable, 1 to 4
    Instructions decoded            64 (max)
    Arithmetic system               Fixed and floating point
    Instruction type                Variable
     One, two or three address.

    Number range
     Fixed - 248  N + 248 
     Floating - 22047 N + 22047

    Instruction word format
     +--------+--------+--------+--------+--------+
     |    1   | 2   13 | 14  25 | 26  37 | 38  49 |
     +--------+--------+--------+--------+--------+
     | Parity | Add or | Add or | Add or | Add or |
     |        | Oper   | Oper   | Oper   | Oper   |
     +--------+--------+--------+--------+--------+
    Format varies with types of instruction.
    Automatic coding
    Symbolic Assembler
    Jovial
    ALGOL Compilers 

    Registers and B-Boxes
    There are three arithmetic registers (49-bits) and 
    five control registers (12-bit length). In addition, 
    there is a thin-film storage unit which contains a 
    four-word operand stack (48-bits), 15 index registers, 
    15 comparison limit registers, and 21 miscellaneous 
    registers from 12 to 64 bits in length to perform 
    various other control and storage functions.
 

BRL 1964, BURROUGHS D825, starting page 0053
 


    ARITHMETIC UNIT
                Fixed Point         Floating Point
                Incl Stor Access    Incl. Stor. Access
                Microsec/Module     Microsec/Module
    Add            2.33               6.0
    Mult          50.00              40.0
    Div           95.00              70.0
    Construction (Arithmetic unit only)
    Vacuum-Tubes             0
    Transistors          5,000
    Diodes              29,000
    Resistors           17,000
    Condensers           5,000
    Four thin-film substrates are used.
    Arithmetic mode         Parallel
    Timing                  Synchronous
    Operation               Concurrent

    STORAGE
                      No. of     No. of Bin.    Access
     Medium           Words      Digits/Word    Microsec
     Magnetic Core    65,536       49           4.33
     Magnetic Tape
            2,000,000 characters/reel.
    Magnetic Drum     65,536       49      17,000
    Magnetic Tape
    No. of units that can be connected         32 Units
    No. of chars/linear inch                  555.5 Chars/inch
    Channels or tracks on the tape              7 Track/tape
    Blank tape separating each record           0.75 Inches
    Tape speed                                120 Inches/sec
    Transfer rate                          66,000 Chars/sec
    Start time                                  5 Millisec
    Stop time                                   5 Millisec
    Average time for experienced
    operator to change reel of tape            30 to 60 Seconds
    Physical properties of tape
     Width                                      0.5 Inches
     Length of reel                         2,400 Feet
     Composition                                  Mylar

    INPUT
        Medium          Speed          Remarks
    Cards              800 cards/min    (On-Line)
    Paper Tape       1,000 chars/min    (On-Line)

     OUTPUT
        Medium          Speed           Remarks
    Cards              300 cards/min    (On-Line)
    Paper Tape         100 chars/min    (On-Line)
    Line Printer     1,200 lines/min    (On-Line)
    Magnetic Tape
    The Input/Output exchange can handle a variety of 
    peripheral devices, up to 64 in number. The maximum rate at
    which any one I/0 module can accept information from 
    any one terminal device is 500,000 chars second.
    The number of input/output operations which can be 
    handled concurrently and on-line in this modular system is
    limited only by the number of I/0 control modules, up 
    to a maximum of ten, and the number of data transfer
    busses available.
 
    CIRCUIT ELEMENTS OF ENTIRE SYSTEM
    Quantity
                      Memory   In/Out Control   Computer
    Tubes                 0              0            0
    Diodes           15,300         11,800       29,300
    Transistors       2,500          2,300        4,810
    Magnetic Cores  200,000              0            0
    Resistors         7,300          7,800       17,000
    The above numbers are on a per/module basis. There 
   are two memory modules per physical cabinet and two I/0
    control modules per cabinet.

    CHECKING FEATURES
    Fixed checking features include accumulator overflow, 
    horizontal and vertical check of magnetic tape, and parity
    on memory transfers.

    POWER, SPACE, WEIGHT, AND SITE PREPARATION
      MODULE         KVA   VOLUME   AREA       WEIGHT     LOADING
    Computer         2.5   65'3"    6.5 sq ft   1,500      231/sq ft
    Memory*          2.6   65'3"    6.5 sq ft   1,450      223/sq ft
    Input/0utput*    2.4   65'3"    6.5 sq ft   1,600      247/sq ft
    *This includes two functional modules. All figures are on a cabinet basis.
    Size of room required is dependent upon number of cabinets 
    employed in the central system as well as number of
    peripheral devices. No air conditioning is required for central processor.

    PRODUCTION RECORD
    Number produced to date         5
    Number in current operation     4
    Number in current production   32
    Number on order                35
    Anticipated production rates    l/month

    RELIABILITY. OPERATING EXPERIENCE
    It is a modular, expansible system co-oriented by a 
    master control program which schedules its own workload
    and automatically diagnoses and bypasses its own failures. 
    It handles real-time interrupts and features automatic
    program restart after primary power failure.
    It is designed to MIL-specifications. This machine passed 
    rigorous military acceptance test at Naval Research
    Laboratories with better than 95% up-time during a 30 day 
    period at 24 hours/day.

    ADDITIONAL FEATURES AND REMARKS
    Outstanding features include truly modular hardware with 
    parallel processing throughout; expandable without re-
    programming; fast compiling speeds; a power failure system  
    with automatic restart feature; each module has the
    same individual power supply, completely interchangeable; 
    and each power supply has a self over/under voltage indication.

    A central processor may consist of from 1 to 4 computer 
    modules, 1 to 16 memory modules (4,096 words each
    and 1 to 10 input/output control modules.

    FUTURE PLANS
    The complement of compiling languages is to be expanded.

    INSTALLATIONS
    U.S. Naval Research Laboratory, Washington,D.C. 
    Mitre Corporation, Bedford, Mass. 
    Systems Development Corp., Santa Monica, Calif. 
    Burroughs Corporation, Paoli, Pa.

    
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