BRL 1964, SDS 910, starting page 0238 |

SDS 910 Scientific Data System 910 MANUFACTURER Scientific Data Systems, Inc. Photo by Scientific Data Systems, Inc. APPLICATIONS The system is designed for general purpose computing. Although its primary purpose is on-line control and real-time systems work, the 910 is useful as a general purpose scientific computer. PROGRAMMING AND NUMERICAL SYSTEM Internal number system Binary Binary digits/word 24 + parity Binary digits/instruction Instructions/word 1 Instructions decoded 39 Arithmetic system Fixed point Floating point is programmed. Instruction type One address Number range - (1-2^{-23})to + (1-2^{-23}) Automatic coding FORTRAN II with magnetic tape statements. Symbolic Assembler Complete package of subroutines and utility programs. Program interchangeability with SDS 920 Computer. A comprehensive software package, including FORTRAN II with magnetic tape statements, a symbolic assembler with macro-handling facilities, and a complete array of arithmetic sub-routines and utility programs, assures powerful, flexible programming with a minimum of "learning time." An SDS innovation, the Programmed Operator, allows programs from any one SDS 900 Series computer to be run on any other SDS 900 Series machine. The SHARE library is available to all 900 Series users. ARITHMETIC UNIT Incl. Stor. Access Fixed Point Microsec Add 16 Multiply 248 Floating Point (24-Bit Coefficient + 9-Bit Exponent) Add 440 Multiply 504 (39-Bit Coefficient + 9-Bit Exponent) Add 832 Multiply 1,696 Construction (Arithmetic unit only) Solid-state components are used throughout. Arithmetic mode Parallel Operation Concurrent STORAGE No. of No. of Cycle Time Medium Words Bits/Word Microsec Magnetic Core 2,048 - 16,384 24 8 Magnetic Tape Type Type 9146 9246 No of chars/linear inch 200 556 Chars/inch Channels or tracks on tape 6 6 Track/tape Blank tape separating each record 0.75 0.75 Inches Tape speed 75 75 Inches/sec Transfer rate 15,000 15,000 Chars/sec Start time 3.3 3.3Millisec Stop time 1.8 1.8 Millisec Physical properties of tape Width 0.5 0.5 Inches Length of reel 2,400 2,400 Feet Composition Mylar Mylar Tape transfer time/channel 62 24 Microsec Rewind time 160 160 Inches/sec Up to four tape units per controller. Checking features on magnetic tape includes a readfollow-write and a longitudinal parity check. INPUT Medium Speed Punched Cards 200 cards/minute Paper Tape 300 chars/sec Typewriter manual

BRL 1964, SDS 910, starting page 0239 |

OUTPUT Medium Punched Cards Typewriter Optional equipment includes a 60 char/sec paper tape punch, an automatic input/output typewriter, 15 kc and 41.7 ?cc magnetic tape units (IBM compatible), 300 line/minute printer, 200 and 250 cards/minute card readers, graph plotter, 896 channels of priority interrupt, second input/output buffer, direct communication with IBIS. 7090, analog-to-digital converters and paper tape spooler. There are five input/output operation modes, buffer with input/output rates an excess of 50,000 chars/sec simultaneous with computation, dual channel priority interrupt, display console and manual control of internal registers and 300 chars/sec photo electric paper tape reader. POWER, SPACE, WEIGHT, AND SITE PREPARATION Power, computer 0.8 Kw Area, computer 200 sq ft Weight, computer 900 lbs Heat Dissipation 3,750 (BTU/hr) Site Preparations Physical: Dimensions 75" x 24" x 27", Power - 110v, 60 cps, 17 amps, Operating temperature range - 0^{o}C, + 50^{o}C. COST, PRICE AND RENTAL RATES Purchase Monthly Price Rental 910 General Purpose Computer Paper-Tape Reader 300 char/sec w/2,048 word core memory $41,000 $ 1,450 w/4,096 word core memory 56,000 1,750 CHECKING FEATURES Parity checking on all memory and input/output operations. The power supply is checked before every cycle. ADDITIONAL FEATURES AND REMARKS Typical application areas include aircraft and missile design and analysis, data reduction systems, civil engineering, simulation studies, optical design, automatic checkout systems, electrical distribution analysis, on-line process control, range safety, statistical analysis, radar control systems,thermodynamic design, searching theory and analysis, crystalographic studies, reactor design and simulation, trajectory computations, data acquisition systems, quality control analysis, medical research, manufacturing control systems, structural analysis, information processing, navigation, critical path scheduling, hydraulic and gas network analysis, satellite computer operation, communication switching systems, and telemetry data reduction. Five distinct input/output systems are standard equipment on 900 Series computers. Information can be processed by bits, characters, or words, for flexibility and speed. A built-in priority interrupt system allows efficient handling of a virtually unlimited number of peripheral input/output devices. An external Memory Interlace system automatically provides direct input/output connection to the core memory, without program intervention, at rates up to 200,000 chars/sec. With SDS 900 Series computers, over 16,000 signals are available for device operation and testing under program control. Three input/output operations can be carried on simultaneously. An integrated group of optional input/output devices - including both low and high density IBM compatible magnetic tape units - are available from SDS. System uses silicon solid-state components to widen operating temperature range and thereby increase reliability by an order of magnitude. All memory operations and input/output are parity checked. Low noise coupling for peripheral equipment insulates the computer system against outside electrical disturbances which cause errors. The memory is protected against information loss in the event of power failure. Closed loop synchronization of all input/output opertions assures no inadvertent loss of information.

BRL 1964, SDS 920, starting page 0240 |

SDS 920 Scientific Data System 920 MANUFACTURER Scientific Data Systems, Inc. Photo by Scientific Data Systems, Inc. APPLICATIONS The system is a general purpose computer designed for scientific engineering computation and for systems integration. Typical application areas include aircraft and missile design and analysis, data reduction systems, civil engineering, simulation studies, optical design, automatic checkout systems, electrical distribution analysis, on-line process control, range safety, statistical analysis, radar control systems, thermodynamic design, searching theory and analysis, crystalographic studies, reactor design and simulation, trajectory computations, data acquisition systems, quality control analysis, medical research, manufacturing control systems, structural analysis, information processing, navigation, critical path scheduling, hydraulic and gas network analysis, satellite computer operation, communication switching systems, and telemetry data reduction. PROGRAMMING AND NUMERICAL SYSTEM Internal number system Binary Binary digits/word 24 + parity Binary digits/instruction - Instructions/word 1 Instructions decoded 62 Arithmetic system Fixed point Floating point is programmed. Instruction type One address Number range - (1-2^{-23}) to + (1-2^{-23}) Automatic coding FORTRAN II with magnetic tape statements. Symbolic Assembler Complete package of subroutines and utility programs. Program interchangeability with SDS 910 Computer. A comprehensive software package, including FORTRAN II with magnetic tape statements, a symbolic assembler with macro- handling facilities, and a complete array of arithmetic sub-routines and utility programs,

BRL 1964, SDS 920, starting page 0241 |

assures powerful, flexible programming with a minimum of "learning time." An SDS innovation, the Programmed Operator, allows programs from any one SDS 900 Series computer to be run on any other SDS Series machine. The SHARE library is available to all 900 Series users. SDS 920 has instructions to facilitate floating point and multi- precision operations. The command list for the 920 is more powerful than that of the 910. ARITHMETIC UNIT Incl. Stor. Access Fixed Point Microsec Add 16 Multiply 32 Floating Point (24-Bit Coefficient + 9-Bit Exponent Add 292 Multiply 248 (39-Bit Coefficient + 9-Bit Exponent Add 368 Multiply 600 Construction (Arithmetic unit only Solid-state components are used throughout. Arithmetic mode Parallel Operation Concurrent STORAGE No. of No. of Cycle Time Medium Words Bits/Word Microsec Magnetic Core 4,096 -16,384 24 8 Magnetic Tape Type 9146 9246 No. of chars/linear inch 200 556 Chars/inch Channels or tracks on tape 6 6 Track/tape Blank tape separating each record 0.75 0.75 Inches Tape Speed 75 75 Inches/sec Transfer rate 15,000 15,000 Chars/sec Start time 3.3 3.3 Millisec Stop time 1.8 1.8 Millisec Physical properties of tape Width 0.5 0.5 Inches Length of reel 2,400 2,400 Feet Composition Mylar Mylar Tape transfer time/channel 62 24 Microsec Rewind time 160 160 Inches/sec Up to four tape units per controller. Checking features on magnetic tape includes a readfollow-write and a longitudinal parity check. INPUT Medium Speed Punched Cards 200 cards/minute Paper Tape 300 chars/second Typewriter Manual OUTPUT Medium Speed Punched Cards Paper Tape 60 chars/second Typewriter Optional equipment includes 15 kc and 41.7 kc magnetic tape units (IBM compatible), 300 line/minute printer, 200 cards/minute and 250 cards/minute card readers, graph plotter, 896 channels of priority interrupt, second input/output buffer, direct communication with IBM 7090, analog-to-digital converters, and paper tape spooler. There are five input/output operation modes, buffer with input/output rates in excess of 50,000 chars/sec simultaneous with computation, dual channel priority interrupt, display console and manual control of internal registers. CHECKING FEATURES Parity checking on all memory and input/output operations. The power supply is checked before every cycle. POWER, SPACE, WEIGHT, AND SITE PREPARATION Power, computer 1.100 KVA Area, computer 200 sq ft Weight, computer 1,000 lbs Heat Dissipation 3,900 (BTU/hr) Site preparations: Physical: Dimensions are 66" x 48" x 27", Power 11OV, 60 cps d 20 amps, Operating temperature range 0 C. to + 50 C. COST, PRICE AND RENTAL RATES 920 General Purpose Computer w/4,096 words of core memory, 300 chars/sec Paper-Tape Reader, 60 char sec Paper-Tape Punch, and Input/Output Typewriter. Purchase: $89,000 Monthly Rental: $2,500 ADDITIONAL FEATURES AND REMARKS The SDS 910 and SDS 920 have identical input/output systems so that a common set of peripheral equipment can be connected to either machine. The word and number format and memory of both machines are also identical. The command list for the 920 is more powerful, making it about 10 times more capable for internal computing speeds than the SDS 910. Five distinct input/output systems are standard equipment on 900 Series computers. Information can be processed by bits, characters, or words, for flexibility and speed. A built-in priority interrupt system allows efficient handling of a virtually unlimited number of peripheral input/output devices. An external Memory Interlace system automatically provides direct input/output connection to the core memory, without program intervention, at rates up to 200,000 characters/second. With SDS 900 Series computers, over 16,000 signals are available for device operation and testing under program control. Three input/output operations can be carried on simultaneously. An integrated group of optional input/output devices - including both low and high density IBM compatible magnetic tape units - are available from SDS. System uses silicon solid-state components to widen operating temperature range and thereby increase reliability by an order of magnitude. All memory operations and input/output are parity checked. Low noise coupling for peripheral equipment insulates the computer system against outside electrical disturbances which cause errors. The memory is protected against information loss in the event of power failure. Closed loop synchronization of all input/output operations assures no inadvertent loss of information.

BRL 1964, SDS 9300, starting page 0242 |

SDS 9300 Scientific Data Systems 9300 MANUFACTURER Scientific Data Systems APPLICATIONS General purpose digital computer for solving a large class of scientific problems. PROGRAMMING AND NUMERICAL SYSTEM Internal number system Binary Binary digits/word 24 & 48 Arithmetic system Fixed & floating point Instructions decoded 110 6-bit Flag Register with set/reset/test instructions which provides fast, easy- to-use program switches for logical decision making. Each position may be set or reset under program control and the status used to control program flow. 11 high-speed search operations operate at 1.75 microseconds/item. Multi-level indexing and indirect addressing. 3 Index Registers Indirect Addressing Index Registers which contain and operate with a base value and an increment or decrement. Repeat instruction which operates with variable size incrementing or decrementing; when used with Input Output, permits Gather-Read and Scatter- Write. Extensive shift and inter-register instructions for data manipulation. Flexible and easily programmed subroutine execution. Up to 8 Automatic Data Channels each capable of fully buffered operation at one word every 1.75 microseconds simultaneously with full speed computation. Automatic Data Channels which operate upon either words or characters. The number of characters/word is under program control. Addressing of Input/output operations can be both indexed and indirect to facilitate Gather and Scatter operations. Parity checking of Memory and Input/Output operation Searching of magnetic tape, disks, etc., can be accomplished independently of the memory and require no computer time. A Parallel Word Input/Output system in addition to the Automatic Data Channels to facilitate operation upon certain types of asynchronous information under program control. SDS 910 available as a satellite Input/Output Processor. Up to 32,000 output control signals and input test signals. A complete priority interrupt system with up to 1,024 priority levels. These can be individually enabled and disabled under program control. Automatic program loading from cards, paper tape, magnetic tape, drums or disks. Complete display of all programmable registers with extensive manual controls. 6 Sense Switches, 2 Manual Interrupt Switches and a Selective Halt provide complete capability for console control during execution. Automatic coding. FORTRAN, Symbolic Assembler, and a Monitor System as part of a complete software package. ARITHMETIC UNIT Incl. Stor. Access Fixed Point Microsec Add 1.75 Double Precision Add 3.5 Multiply 7.0 Shift (24-positional) 5.25 Floating Point (39-Bit Coefficient + 9-Bit Exponent Add 14.0 Multiply 12.25 Typical floating point programs, using a 48-bit word are executed at the rate of 100,000 instructions/ second. Operation Concurrent Eight tape stations can operate concurrently without disturbing arithmetic computations, which can take place simultaneously. STORAGE No. of No. of Access Medium Words Bits/Word Microsec Magnetic Core 32,768 0.7 Eight tapes operate concurrently with arithmetic operations. INPUT Medium Speed Data Channel 2,000,000 words/sec Magnetic Tape There are 8 automatic data channels, three other types of Input/Output, one of which permits up to 1,024 channels of priority interrupt, and another allows data transfer up to 2,285,000 characters/second. OUTPUT Medium Speed Data Channel 2,000,000 words/sec Magnetic Tape CIRCUIT ELEMENTS OF ENTIRE SYSTEM All silicon semi-conductors. POWER, SPACE, WEIGHT, AND SITE PREPARATION Power 3.5 Kw Site preparation requirements. System is small and transportable, requiring no air conditioning, except to maintain l0oC. to 40 C. in room. Dimensions are approximately 6 x 8 x 2 feet plus operators console. COST, PRICE AND RENTAL RATES Purchase price of computer: $250,000 ADDITIONAL FEATURES AND REMARKS The system is logically and electrically similar to the SDS 910 and the SDS 920. Byte operations which permit manipulation of 3, 6,9, 12,15, 18, or 21-bit Bytes. Two 12-bit Bytes may be multiplied in 3.5 microseconds.

BRL 1964, SDS 9300, starting page 0243 |

BRL 1964, SEMA 2000, starting page 0244 |

SEMA 2000 SEMA 2000 MANUFACTURER H R B Singer, Incorporated Photo by H R B Singer, Incorporated APPLICATIONS Off-line business data processing. PROGRAMMING AND NUMERICAL SYSTEM Internal number system Binary coded dec. Decimal digits/word 10 Decimal digits/instruction 0 Instructions/word 0 Arithmetic system Fixed point Instruction type One address Number range -999 999,999 to +8,999,999,999 Automatic built-in subroutines. None Automatic coding. None Registers and B-Boxes The address register may be automatically incremented. Instructions are inserted by means of a plugboard wired program. ARITHMETIC UNIT Incl. Stor. Access Excl. Stor. Access Microsec Microsec Add 8,500 167 Mult 42,500 34,000 Multiply times are average times per digit in the multiplier. Arithmetic mode Serial Timing Synchronous Operation Concurrent STORAGE No. of No. of Access Medium Words Digits Microsec Magnetic Core 16 160 1,000 Accumulator 1 10 167 Magnetic Drum 4,000 or 160 1,000 10,000 Magnetic Tape No. of units that can be connected 1 Unit

BRL 1964, SEMA 2000, starting page 0245 |

Photo by H R B Singer, Incorporated No. of chare/linear inch 50 Chars/inch Channels or tracks on the tape 2 Tracks Blark tape separating each record 0.125 Inches Tape speed 7.5 Inches/se Transfer rate 375 Chars/sec Average time for experienced operator to charge reel 10 Seconds Physical properties of tape Width 0.25 Inches Length of reel 600 Feet Fast reel change obtained through the use of a cartridge. INPUT Medium Speed Pinched Cards 650 cards/min Paper Tape header 300 chars/sec The card reading rate depends on the type of read used. A photo-electric paper tape reader is used. OUTPUT Medium Speed Punched Cards 100 cards/min Tabulator 100 - 150 lines/min CIRCUIT ELEMENTS OF ENTIRE SYSTEM Type Quantity Diodes 2,500 Transistors 1,500 Magnetic Cores 1,920 CHECKING FEATURES A parity check is made on each word read from the drum. POWER, SPACE, WEIGHT, AND SITE PREPARATION Power, computer 0.01 Kw 0.01 KVA Area, computer 4 sq ft Volume, computer 16 cu ft Room size 6 x 10 ft Floor loading 50 lbs/sq ft 50 lbs concen max Weight, computer 200 lbs Special site preparation is not required. An air conditioner is not required. COST, PRICE AND RENTAL RATES Price Basic system $28,500 to $50,000 Rental, basic system 750 to 1,250 Rental, high speed paper tape reader 400 Maintenance/service contract $1,000/year after first year, if purchased. PERSONNEL REQUIREMENTS One person is required to operate, program and code system for each 8-hour shift.

BRL 1964, SEMA 2000, starting page 0246 |

Individual training is made available by the manufacturer to the user. Control panel wiring is quite simple for a user with IBM wiring experience. Operator training is given on the user's own premises. RELIABILITY, OPERATING EXPERIENCE Operation with 97% up-time has been achieved. ADDITIONAL FEATURES AND REMARKS A mobile electronic memory attachment is available which sorts, stores, summarizes and selcts data at random as a 100% by-product of normal EAM operations. The system can be readily transferred from one I/0 device to another. SEMA operates between card cycles of the IBM (EAM) machine to which it is attached. The IBM machine (collators, reproducers, tabulators, etc.) operate at their normal speed. As a result of its random access capabilities, the SEMA 2000 can perform important functions, at electronic speeds, as a 100% by-product of necessary EAM machine operations; can summarize data "off line" via collators and other high speed equipment to substantially reduce accounting machine time; eliminate major sorting, collating and card handling operations; and eliminate the need for computations by means of stored tables. The flexibility of SEMA 2000 enables it to increase the speed of handling punched cards by as much as 6 1/2 times. It also permits a reduction in costly accounting machine time, for example, by summarizing details via a high speed collator and using the accounting machine to print only the pre-summarized totals in SEMA. SEMA 2000 can be programmed to provide controls in the following areas: Inventory Control Order Confirmation Sales Analysis Order Allocation Payroll Production Control Store Audit Labor Distribution Reports Pricing Unit Control SEMA 2000 is an electronic memory unit designed to utilize conventional EAM tabulating equipment to produce electronic data processing results at typical EAM prices. It operates with accounting machines, collators, reproducers, calculators and punches. With its random access capabilities, SEMA is able to perform important functions between card cycles on EAM equipment and thereby providing increased data processing output. The transistorized SENA utilizes an electronic memory drum for random access data storage. It takes its input and output instructions from EAM equipment, reads selected data at random and summarizes these data as a by-product of necessary EAM machine operations. The SEMA memory drum has a capacity of 2000 tendigit words and two flags per word. By means of a control switch, capacity can be increased to 4000 five-digit words and one flag per word. Additional memory drums can be added. For instance, with five drums SEMA can accommodate up to 10,000 ten-digit words and two flags, or 20,000 five-digit words and one flag per word. The following applications demonstrate the ability of SEMA 2000: Order allocation, inventory control and sales analysis-as a result of a single collator pass. Inventory control and sales analysis as a by-product of an invoicing run. Automatic pricing and extending of line items as a by- product of an invoicing run. Order confirmation, inventory control and "goods in process" interrogation as a by-product of a single accounting machine run. Elimination of calculating machine passes for payroll computationsby means of stored deduction tables.

BRL 1964, SEMAC, starting page 0247 |

SEMAC SEMAC MANUFACTURER H R B Singer, Incorporated APPLICATIONS On-line business data processing PROGRAMMING AND NUMERICAL SYSTEM Internal number system Binary coded dec Decimal digits/word 10 Decimal digits/instruction 10 Instructions/word 1 Instructions decoded 35 Arithmetic system Fixed point Instruction type One address Number range -999,999,999 to +8,999,999,999 +---------+--------+---------+---------+ | Command | Branch | Repeat | Address | | | Addr | Counter | | +---------+--------+---------+---------+ Automatic built-in subroutines Drum search routines. Automatic coding None Registers and B-boxes Repeat counter ARITHMETIC UNIT Incl. Stor Access Excl. Stor. Access Microsec Microsec Add 8,500. 167 Mult 42,500/digit 34,000 Div 100,000/digit 91,500 Multiply time is average value/digit in multiplier. Divide time is average value/digit in quotient. Construction (Arithmetic unit only) Transistors 2,500 Diodes 3,500 Magnetic-Cores 1,920 Arithmetic mode Serial Timing Synchronous Operation Sequential STORAGE No. of No. of Access Medium Words Digits Microsec Magnetic Core 16 160 1,000 Registers 3 30 500 Magnetic Drum 10,000 100,000 8,500 Magnetic Tape No. of units that can be connected 1 Unit No. of chars/linear inch 50 Chars/inch Channels or tracks on the tape 2 Tracks Blank tape separating each record 0.125 Inches Tape speed 7.5 Inches/sec Transfer rate 375 Chars/sec Average time for experienced operator to change reel 10 Seconds Physical properties of tape Width 0.25 Inches Length of Reel 600 Feet Fast reel change obtained through the use of a cartridge. INPUT Medium Speed Punched Cards 100-650 cards/min Paper Tape (Photo) 300 chars/sec Paper Tape (Mech) 50 chars/sec Typewriter 10 chars/sec Card reading rate depends on type of reader used. OUTPUT Medium Speed Punched Cards 100 cards/min Paper Tape 50 chars/sec Tabulator 100-150 lines/min Typewriter 10 chars/sec CIRCUIT ELEMENTS OF ENTIRE SYSTEM Type Quantity Diodes 3,500 Transistors 2,500 Magnetic Cores 1,920 CHECKING FEATURES A parity check is made on each word from the drum. POWER, SPACE, WEIGHT, AND SITE PREPARATION Power, computer 0.50 Kw 0.01 KVA Area, computer 8 sq ft Volume, computer 32 cu ft Room size 10 x 20 ft Floor loading 50 lbs/sq ft 50 lbs concen max Weight, computer 300 lbs Special site preparation is not required. An air conditioner is not required. COST, PRICE AND RENTAL RATES Price Memory Unit $28,500 to $50,000 Control Unit 20,000 Paper Tape Reader 5,000 Tape Typewriter 3,500 Rental, memory unit 750 to 1,250 Rental, control unit 500 Rental, paper tape reader 400 Rental, tape typewriter 150 Maintenance/service contract $1,800 after first year, if purchased. PERSONNEL REQUIREMENTS One 8-Hour Two 8-Hour Three 8-Hour Shift Shifts Shifts Programmers 1 1 1 Operators 1 2 3 Individual training is made available by the manufacturer to the user. ADDITIONAL FEATURES AND REMARKS The system has its own input and output, as opposed to the SEMA 2000.

BRL 1964, SPEDAC 220, starting page 0248 |

SPEDAC 220 MANUFACTURER Hazeltine Corporation, Technical Development Center Photo by the Hazeltine Corporation APPLICATIONS Scientific applications include simulation, data reduction, real-time control, optimization, correlation, and dynamic system analysis. The field of application encompasses those areas in which fast and accurate solutions are required for equations of algebraic, differential, partial differential, simultaneous, non-linear, and implicit types. These equations may contain discontinuities, arbitrary functions, trigonometric functions, exponential functions, logarithmic functions, complex roots, and factorials. PROGRAMMING AND NUMERICAL SYSTEM Internal number system Binary Binary digits/word 22, 26 or 30 Binary digits/instruction 26 Instructions/word 1 Arithmetic system Fixed point (incremental) Instruction type One address Number range - 1 <= N < + 1 Automatic built-in subroutines include multiplication and integration. The total number of instructions decoded and the instruction word format depends upon the external equipment. Instructions are required only for input/output. ARITHMETIC UNIT Arithmetic mode Parallel Timing Synchronous Operation Concurrent STORAGE No. of No. of Access Words Bin/Digits Microsec Registers two/integrator 22, 26 or 30 0.8 Magnetic Core 2,176 49,112 2 Magnetic Tape No. of units that can be connected 1 Magnetic tape units are not normally required. INPUT Medium Keyboard Paper Tape General Purpose Computer Magnetic Tape Flexowriter Digital-to-analog Converters OUTPUT Medium Numeric Display Paper Tape General Purpose Computer Magnetic Tape Flexowriter Digital-to-analog Converters CIRCUIT ELEMENTS OF ENTIRE SYSTEM Type Quantity Tubes 0 Diodes (1N281)

BRL 1964, SPEDAC 220, starting page 0249 |

Photo by the Hazeltine Corporation Transistors 2N404 2N1754 Magnetic Cores 50 mil (Ferro) 49,112 Used for memory only CHECKING FEATURES Checking features include diagnostic program; input/output parity checks; register overflow alarm; and a synchronizer monitor. POWER, SPACE, WEIGHT, AND SITE PREPARATION Power, computer 2.4 Kw 3.0 KVA 0.8 pf Air conditioner None supplied Volume, computer 120 cu ft Area, computer 20 sq ft Room size 120 sq ft Floor loading 100 lbs/sq ft Weight, computer 1,700 lbs Internal blowers supply forced air at 300 cfm; these may optionally be replaced by a floor plenum supplying 300 cfm of air. An air conditioner is not required. PRODUCTION RECORD Number produced to date 2 Number in current operation 2 Time required for delivery 6 months COST, PRICE AND RENTAL RATE Price Basic System $132,000 and up PERSONNEL REQUIREMENTS Training made available by the manufacturer to users includes programming and maintenance schools. RELIABILITY, OPERATING EXPERIENCE All circuits are solid-state and are designed to withstand wide temperature fluctuations. All connector contacts are gold- plated. The bulk of the electronic components are Military- Standard. Operating Ratio (Good/Attempted to Run Time): 0.995 for 1,000 hour periods, according to manufacturer's records. ADDITIONAL FEATURES AND REMARKS The system can be used in either analog and/or digital hybrid configuration to provide rapid solutions to transcendental equations. SPEDAC is a digital differential analyzer (DDA). It employs a variable number of multiple digital arithmetic units, all of which operate simultaneously. SPEDAC 220 computes at 200,000 iterations per second. Regardless of problem complexity, the entire problem solution is updated incrementally each 5 microseconds. Various types of computing elements perform integrations, multiplications, additions and decisions. SPEDAC is a combination of the characteristics of general purpose analog and digital computers. Although all the circuits are digital, SPEDAC is programmed like an analog computer, i.e., the original problem formulation is placed in the machine, with a minimum of programming effort, rather than a solved, linearized, approximation made by a numerical analyst.

BRL 1964, SPEDAC 310, starting page 0250 |

SPEDAC 310 MANUFACTURER Hazeltine Corporation, Technical Development Center Photo by the Hazeltine Corporation APPLICATIONS Scientific applications include simulation, data reduction, real-time control, optimization, correlation, and dynamic system analysis. The field of application encompasses those areas in which fast and accurate solutions are required for equations of algebraic, differential, partial differential, simultaneous, non- linear, and implicit types. These equations may contain discontinuities, arbitrary functions, trigonometric functions, exponential functions, logarithmic functions, complex roots, and factorials. PROGRAMMING AND NUMERICAL SYSTEM Internal number system Binary Binary digits/word 22, 26 or 30 Binary digits/instruction 26 Instructions/word 1 Arithmetic system Fixed point (incremental) Instruction type One address Number range -1 <= N < +1 Automatic built-in subroutines include multiplication and integration. The total number of instructions decoded and the instruction word format depends upon the external equipment. Instructions are required only for input/output. ARITHMETIC UNIT Arithmetic mode Parallel Timing Synchronous Operation Concurrent STORAGE No. of No. of Access Words Bin/Digits Microsec Registers two/integrator 22,26 or 30 0.8 Magnetic Core 2,176 49,112 2 Magnetic Tape No. of units that can be connected 1 Magnetic tape units are not normally required. INPUT Medium Keyboard Paper Tape General Purpose Computer Magnetic Tape Flexowriter Digital-to-analog Converters OUTPUT Medium Numeric Display Paper Tape General Purpose Computer Magnetic Tape Flexowriter Digital-to-analog Converters CIRCUIT ELEMENTS OF ENTIRE SYSTEM Type Quantity Tubes 0 Diodes (1N995) Transistors (2N965) Magnetic Cores (30 mil Ferro) 49,112

BRL 1964, SPEDAC 310, starting page 0251 |

CHECKING FEATURES Checking features include diagnostic programs; input/output parity checks; register overflow alarm; and a synchronizer monitor. POWER, SPACE, WEIGHT, AND SITE. PREPARATION Power, computer 4.5 Kw 5 KVA 0.9pf Air conditioner None supplied. 600-100oF required Volume, computer 120 cu ft Area, computer 20 sq ft Room size 160 sq ft Floor loading 100 lbs/sq ft 100 lbs concen max Weight, computer 2,000 lbs Room environment of 60^{o}- 100^{o}F required. An air conditioner is not required. COST, PRICE AND RENTAL RATES Price Basic System $200,000 and up PERSONNEL REQUIREMENTS Training.made available by the manufacturer to users includes programming and maintenance schools. RELIABILITY, OPERATING EXPERIENCE All circuits are solid-state and are designed to withstand wide temperature fluctuations. All connector contacts are gold-plated. The bulk of the electronic components are Military-Standard. Operating Ratio (Good/Attempted to Run Time): 0.995 for 1,000 hour periods, according to manufacturer's records. ADDITIONAL FEATURES AND REMARKS The system can be used in either analog and/or digital hybrid configuration to provide rapid solutions to transcendental equations. SPEDAC is a digital differential analyzer (DDA). It employs a variable number of multiple digital arithmetic units, all of which operate simultaneously. SPEDAC 310 computes at 1,000,000 iterations per second. Regardless of problem complexity, the entire problem solution is updated incrementally each 5 microseconds. Various types of computing elements perform integrations, multiplications, additions and decisions. SPEDAC is a combination of the characteristics of general purpose analog and digital computers. Although all the circuits are digital, SPEDAC is programmed like an analog computer, i.e., the original problem formulation is placed in the machine, with e minimum of programming effort, rather than a solved. linearized, approximation made by a numerical analyst.

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