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BRL 1961, JOHNNIAC, start page 0576


John (Von Neumann) Integrator and Automatic Computer MANUFACTURER The Rand Corporation Photo by the Rand Corporation APPLICATIONS Scientific and engineering data processing. PROGRAMMING AND NUMERICAL SYSTEM Internal number system Binary Binary digits per word 40 Binary digits per instruction 20 Instructions per word 2 Instructions decoded 128 Instructions used Approx.85 Arithmetic system Fixed point Instruction type One address Number range Numerically less than unity. Negative numbers are represented as complements. ARITHMETIC UNIT Includ. Stor. Access Exclud. Stor. Access Microsec Microsec Add time 25 10 Mult time 400 385 Div time 400 385 Construction Vacuum tubes and transistors Rapid access word registers 4 Arithmetic mode Parallel Timing Asynchronous Operation Sequential Addition is concurrent with store cycle. Multiply and divide times are maximum. The transistorized logical adder has a full carry time of 1.5 microseconds. In 1957, the vacuum tube analog adder was replaced with a transistorized logical adder. The maximum carry time of the new 40-stage adder is 0.8 microseconds. There are about 1200 transistors in the unit. The transistor count includes many logical functions which have been packaged with the adder. The control has been partly transistorized to gain a significant increase in basic operation rates. Circuit modifications have been limited to control sections affecting basic clear, gate, and shift operations. STORAGE Microsec Media Words Digits Access Magnetic Core 4,096 40/word 15 Magnetic Drum 12,288 40/word 1,000 Drum access time is average access to first word. Sixty microseconds are required for each succeeding address in same channel.
BRL 1961, JOHNNIAC, start page 0577
INPUT Media Speed Card Reader 240 cards/min An IBM collator is used. Both primary and secondary feeds are used. OUTPUT Media Speed Card Punch 100 cards/min Printer (ANelex) 1,200 lines/min An IBM 523 is used. The printer prints 136 columns, 56 char/column (alphanumeric). During the year 1959 an on-line modified EAI plotter was installed. The 40" x 40" plotter was modified to include straight line drawing ability as well as circle drawing ability. The plotter can be instructed under JOHNNIAC control to go to point Xl, Y1 and draw a line to point X2, Y2. The circle drawing instruction causes the plotter to go to point X, Y and draw a circle of radius r. Point plotting and symbol printing are also available. In 1959, an on-line ANelex printer was added. CIRCUIT ELEMENTS OF ENTIRE SYSTEM Tubes 5,000 Tube types 11 Crystal diodes 500 Magnetic storage cores163,840 Magnetic switch cores 5,120 Transistors 1,400 CHECKING FEATURES Manual marginal testing is performed. POWER, SPACE, WEIGHT, AND SITE PREPARATION Power, computer 55 Kw, 63 KVA, 0.88 PF Power, air cond. 28 Kw Space, computer 290 cu. ft., 36 sq. ft. Space, air cond. 180 cu. ft., 50 sq. ft. Weight, computer 5,000 lbs. Weight, air cond. 5,000 lbs. Capacity, air cond. 25 tons Dimensions of computer are 12 x 3 x 8 feet. PRODUCTION RECORD Produced 1 Operating 1 This system was designed and is owned and operated by the Rand Corporation. PERSONNEL REQUIREMENTS Tech and Daily Operation Engineers Operators 2-8 Hour shifts 1 2 One technician per shift and one engineer on call is required. RELIABILITY, OPERATING EXPERIENCE, AND TIME AVAILABILITY Average error-free running period 10 hours Good time 1,380 hours Attempted to run time 1,500 hours Operating ratio (Good/Attempted to run) 0.92 Figures based on period July 1956 to November 1956 Acceptance test March 1954 Two transistors of the new arithmetic unit failed during the first year of operation due to defective seals. No failures have occurred since early 1958. This failure record represents two transistor failures in 14,976,000 transistor- hours. ADDITIONAL FEATURES AND REMARKS System includes console facilities which report static state of all registers in an octal display, allow manual entry of information via a keyboard, punch contents of all registers and keyboard conditioning switches on a single card, display static state of all toggles and allow manual control over toggle states. A wired in core store test routine is included which tests all addresses and bits under a variety of information patterns without aid of a stored program. INSTALLATIONS The Rand Corporation 1700 Main Street Santa Monica, California
BRL 1961, JUKEBOX, start page 0578


Missile Firing Data Computer JUKEBOX MANUFACTURER Autonetics Division North American Aviation, Incorporated APPLICATIONS General purpose computing. PROGRAMMING AND NUMERICAL SYSTEM Internal number system Binary Binary digits/word 39 + Sync + sign Binary digits/instruction 20 Instructions per word 2 Arithmetic system Fixed point Instruction type Two address Number range - 1 < N < + 1 Instruction word format +-------+-----------------+-------+--------------------+--------+ | Sign | Left Command | Sign | Right Command | Sync | +-------+------+----------+-------+------+-------------+--------+ | + | 1 6 | 7 7 6 0 0| + | 1 6 | 7 7 6 0 0 | 1 | +-------+------+----------+-------+------+-------------+--------+ | B 0 0 | 0 0 0 0 B| B 0 0 | 0 0 0 0 B | | Operation LocationOperation Location B - Binary 0 - Octal Computer uses binary coded decimal and command format on input and output devices only. Automatic coding Punched tape teletype code to octal or binary coded decimal during tape fill. Registers and B-boxes Two 8-word rapid access storage registers. Five 1word arithmetic registers. ARITHMETIC UNIT Incl Stor Access Exclud Stor Access Microsec Microsec Memory HS Storage Add 9,590 2,040 540 Mult 19,850 12,300 10,800 Div 20,390 12,840 11,340 Average access time 9,050 microseconds. Construction (Arithmetic unit only) Transistors 664 Condensers 673 Diodes 4,401 Arithmetic mode Serial Timing Synchronous Operation Sequential STORAGE No. of No. of Access Mediun Words Digits Microsec Magnetic Disk 4,096 167,936 9,050 INPUT Media Speed Paper Tape 200 char/sec 20 in/sec Keyboard Manual OUTPUT Media Speed Printer (Typewriter) 11 char/sec (BCD or octal) Nixie Display Tubes 16 char/17,280 microsec (BCD or octal) CIRCUIT ELEMENTS OF ENTIRE SYSTEM Type Quantity Tubes 0 Diodes 5,316 Transistors 885 Magnetic Cores 0 Above figures do not include system and component testers. CHECKING FEATURES Component test set:Tests each computer board sep- arately. Optional in both dynamic and static modes. System test set: Panel array of neon indicators showing the status of all the flipflops in a dynamic or static oneshot mode; includes marginal test feature of power supply variation and clock fitter. POWER, SPACE, WEIGHT, AND SITE PREPARATION Power, computer 0.5 Kw 0.9 pf Volume, computer 4 cu ft Volume, parameter 1.25 cu ft Volume, tape reader 2.5 cu ft Vole, control 1.25 cu ft Area, computer 2 sq ft Area, parameter 1.25 sq ft Area, tape reader 1.25 sq ft Area, control 1.25 sq ft Room size, computer (weight) 125 lbs Room size, parameter weight 55 lbs Room size, tape read weight; 45 lbs Room size, control (weight) 50 lbs Floor loading 35 lbs/sq ft 125 lbs concen max Weight, computer 275 lbs, total plus 90 lbs auxiliary equipment Air conditioner is not supplied with computer. Computer operating temperaturerange 55oF to 110oF Temperature rise approximately 10oF above room temperature. Frequency range 50 to 70 cycles/sec Voltage range 105 v, ac to 135v, ac Auxiliary equipment Systems tester 2 cu ft, 2.5 sq ft, 38 lbs 60w Component tester 3.75 cu ft, 2.5 sq ft, 52 lbs 90 w
BRL 1961, JUKEBOX, start page 0579
PRODUCTION RECORD Number produced to date 5 In addition to the five computers specified, there exist five R&D models operating on 400 cycle power with half the clock rate and computing speed. PERSONNEL REQUIREMENTS One operator per 8-hour shift. Training made available by manufacturer to users includes maintenance and programming. RELIABILITY, OPERATING EXPERIENCE, AND TIME AVAILABILITY Several construction features have been incorporated to enhance reliability. These are all solid-state components, gold-plated pins, connectors, and etched circuitry, epoxy-coated boards, closed- loop wiring; wires to gates, power supplies, clock signals are routed back to the origin to retain operation in case of wire breakage, and extensive use is made of timeshared gates and flip- flops to minimize the total number of components. ADDITIONAL FEATURES AND REMARKS Outstanding features include simplicity of operation and programming. Unique system advantages include high-speed visual display of information in memory, either in binary coded decimal or command format. FUTURE PLANS This system has been replaced by the FADAC computer. INSTALLATIONS Autonetics, a Division of North American Aviation, Inc. 9150 E. Imperial Highway Downey, California

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