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| BRL 1964, RCA 3301 REALCOM, starting page 0230
|
RCA 3301 REALCOM
RCA 3301 REALCOM
MANUFACTURER
Radio Corporation of America
Photo by Radio Corporation of America
APPLICATIONS
The RCA 3301 Realcom is an all-purpose electronic data processing
system. The Realcom combines realtime, data communications and
scientific computation capabilities with powerful random access and
serial data processing. A single RCA 3301 Realcom can provide the
entire range of data processing capability required for an
organization's total business operations. Together, the RCA Realcom
and RCA 301 form a compatible machine family.
The computer is an all-purpose stored program digital machine
utilizing transistor and diode circuitry. The machine consists of high-
speed storage, micro-magnetic storage, program control, console and a
power supply. The 40,000 to 160,000 character high-speed storage is a
magnetic core, decimally addressed, random access device with a memory
cycle time of 1.75 microseconds. The micro-magnetic storage is
utilized for registers and temporary storage, with a cycle time of 250
nanoseconds. The program control unit contains circuitry for the
interpretation and execution of the instructions, controls the
interrupt system and performs automation accuracy checks. The console
contains an operator's section to monitor normal operations and a
maintenance section houses the indicators and switches needed for
maintenance. The power supply unit supplies power to the Processor,
Control Modules, and certain InputOutput devices.
Five operating modes are available in the RCA 3301 computer in
addition to buffered input-output devices. A basic processor includes
a normal mode and two simultaneous modes for input-output operations.
A third I/0 simultaneous mode and a communication mode are optional.
Printers, card punches and interrogating typewriters are completely
buffered.
PROGRAMMING AND NUMERICAL SYSTEM
Internal number system Binary coded decimal
Decimal digits/word 10
Character oriented, word capabilities
Decimal digits/instruction 10
Instructions/word 1
Instructions decoded 61
Arithmetic system Boolean arithmetic
Optional high-speed arithmetic unit provides fixed and floating point
arithmetics.
Instruction type Two address
Number range
Limited by size of memory selected.
Instruction word format
+-----------+-------------+-----------+-----------+
| 1 | 1 | 4 | 4 |
+-----------+-------------+-----------+-----------+
| Operation | N Character | A Address | B Address |
+-----------+-------------+-----------+-----------+
N Character specifies an I/0 device, symbol or count;
or, in combination with the OP Code, an operation.
Automatic built-in subroutines
Several operation codes have the effect of a subroutine, i.e.
Translate by Table provides conversion from one bit structure to
another; Transfer by Count to Edit edits data for printing.
Automatic coding
Automatic coding includes FORTRAN, COBOL-61 Extended with Report
Writer and an Assembly System.
A variety of general-purpose service programs are provided. The
Operating System includes a File Control Processor which handles input-
output processing and the Executive Control System which controls the
physical environment.
| BRL 1964, RCA 3301 REALCOM, starting page 0231
|
Other programs provided include PERT, an "Oscillating"
sort and merge system, utility programs such as memory dump,
tape copy, tape compare, test data distribution,
peripheral conversion programs and all required PLT
maintenance routines. RCA 301 programs are also accommodated.
Registers and B-Boxes
There are ten basic registers plus 50 four-character
locations in Micro Magnetic Memory (MMM) for register storage.
Included in MMM are three index registers and
accompanying increment registers.
ARITHMETIC UNIT
Incl. Stor. Access Excl. Stor. Access
Microsec Microsec
Add 9.75 1.75
Mutt 34.63 26.63
Div 58.00 50.00
Construction (Arithmetic unit only)
The quantity of transistors, diodes and magnetic cores used
in the arithmetic unit depend on the particular unit used.
Arithmetic mode Serial (Standard)
Parallel high-speed arithmetic unit,
and for indexing and incrementing index registers.
Above times assume 8-character fixed point fields
with high speed arithmetic unit. Sample internal speeds (incl.
instruction access time) are:
Transfer 10 char. word: 5.75 microseconds;
Compare 10 char. fields: 6.25 to 42.25 microseconds
(left to right compare with termination upon inequality).
Timing Asynchronous
Operation Concurrent
STORAGE
No. of No. of Access
Medium Words Digits Microsec
Magnetic Core 4,000 - 40,000 - 1.75
16,000 160,000
Micro-Magnetic 50 200 0.25
Memory
Data Disk File 22,000,000 - 100,000 Avg.
530,000,000
INPUT
Medium Speed
Punched Cards Model 324 900 cards/min
Model 329 1,470 cards/min
50 or 81 column cards are photo-electrically read
in binary or translate mode.
Paper Tape 100, 500, or 1,000 chars/see
Can accomodate 5, 6, 7 or 8 channel tape.
Magnetic Tape
All input devices are operated in a simultaneous mode
allowing compute to occur during the read.
OUTPUT
Medium Speed
Printer, Model 333 1,000 lines/min (120 chars/line)
Printer, Model 335 1,000 lines/min (160 chars/line)
Card Punch 300 cards/min
80 col/card in binary or translate mode.
Paper Tape Punch 100 or 300 chars/min
Features include the punching of 5, 7, or 8 channel tape.
Console Typewriter 924 chars/min
Accommodates each RCA 3301 character
Magnetic Tape
Printer and card punch are completely buffered.
Transfer to the printer and card punch control occurs
in a simultaneous mode at the rate of 4 microseconds
or 36 microseconds/character respectively.
All output occurs in a simultaneous mode
with compute concurrently proceeding in the Normal Mode.
In addition to normal input-output devices, four
real-time or communications devices are available
in the RCA 3301 Realcom System.
The Interrogating Typewriter is a completely buffered
input-output device for remote inquiry. Inquiry messages may be
entered from a distance of up to 2,000 feet from the
Computer. Output is typed at up to 924 characters/minute. Eight
Interrogating Typewriters are permitted in an RCA 3301 System.
The Communications Control permits long distance communication between an RCA 3301 and other computers or remote
terminals via telephone lines.
| Magetic Tape | Model Nr: | 581 | 582 | 681 | 3485
|
| 24 Units can be connected | Units | 24 | 24 | 24 | 24
|
| No. or chars/linear inch | Chars/inch | 333 | 667 | 800 | 200,556,800
|
| Channels or tracks on the tape | Tracks/tap | 16 | 16 | 16 | 8
|
| Blank tape separating each record | Inches | 0.34 | 0.54 | 1.1 | 0.75
|
| Tape speed | Inches/sec | 100 | 100 | 150 | 150
|
| Transfer rate | Chars/sec | 33,333 | 66,667 | 120,000 | 30,000, 83,400, 120,000
|
| Start time | Millisec | 3.5 | 3.5 | 5.3 | 3.0
|
| Stop time | Millisec | - - | 2.0 | 2.0 | 2.0
|
| Average time for experienced operator to change reel |
Seconds | 30- 45 | 30- 45 | 30 - 45 | 30 - 45
|
| Physical properties of tape
|
| Width | Inches | 0.75 | 0.75 | 0.75 | 0.50
|
| Length of reel | Feet | 2,400 | 2,400 | 2,400 | 2,400
|
| Composition | Mylar | Mylar | Mylar | Mylar
|
Tape stop time is required for read-after write check;
other tape slow down time is available for computation.
The RCA 3301 Realcom is basically a character machine
with word capabilities. Instructions are accessed by word, and
internal data manipulation may be either word or character as programmed.
Four models of the Data Disk File are available on the 3301.
Model 1 with 22,118,400 characters; Model 2 with
44,236,800 characters; Model 3 with 66,355,200 characters;
and Model 4, with 88,473,600 characters. Up to six Model 4
disk files will have a capacity of over 530,000,000 characters.
Disk Characteristics: 9 data zones of 128 tracks each
per disk surface. Each track sores 1,600 sevenbit characters and is
divided into ten 160-charact r sectors. In one movement
all the access arms of a file are positioned so that all of the read-
write heads are over the same track in each zone.
Because of this feature, the file is not limited to the data on a single
disk. When the heads are positioned over one of the
128 tracks in each zone, there are from 108 (model 1) to 432
(Model 4) full tracks available with no additional
mechanical movement. Once initiated track selection
proceeds independently of other computer processing.
| BRL 1964, RCA 3301 REALCOM, starting page 0232
|
Extensive checks are conducted at key points within the system to
insure accurate reliable operations. Parity is checked whenever
information is transferred within the system. Other error conditions
detected include the use of an invalid operation code, addressing
beyond the confines of high-speed memory, arithmetic overflow, and
divisor error.
Input-output operations are effectively controlled with respect to the
devices being busy or inoperable, or incorrect parity being read or
written.
When the Realcom hardware detects a malfunction, an indicator is set
and control is automatically transferred to the Executive system via a
priority interrupt. Software then analyzes the condition, effects an
automatic tape re-read or re-write when indicated, and communicates to
the operator if required.
POWER, SPACE, WEIGHT, AND SITE. PREPARATION
Site preparation requirements. A 208 volt, 60 cycle/second, single-
phase, four-wire power system is required.
PRODUCTION RECORD
Number produced to date 1
Number in current operation 1
Time required for delivery 11 months
COST, PRICE AND RENTAL RATES
BASIC
MODEL TYPICAL MONTHLY
NR. ON-LINE COMMUNICATIONS SYSTEM RENTAL
3303 BASIC PROCESSOR $ 9,800
3361-3 Memory Increment 2,500
3378-21 CMC 680
6025-21 Interface Unit 100
6002-11 Telegraph Buffer 300
6071 Communications Rack 60
6072 Buffer Frames (10) 300
6080 Power Supply 100
581 Tapes (6) 33KC 3,300
3383-6 Dual Tape Channel 400
324, Card Reader & Control 660
333, 3333 On-Line Printer & Control 1,575
-------
$ 19,775
ON-LINE SERIAL DATA PROCESSING SYSTEM
3303 BASIC PROCESSOR $ 9,800
582 Tapes (8) 66KC 7,00O
3383-12 Dial Tape Channel 450
324, 3329 Card Reader & Control 660
333, 3333 On-Line Printer & Control 1,575
-------
$ 19,485
OFF-LINE SERIAL DATA PROCESSING SYSTEM
3303 BASIC PROCESSOR $9,800
582 Tapes (6) 66KC 5,250
3383-6 Dual Tape Channel 400
303 Satellite (301) 1,750
330 Card Reader/Punch and Control 1,130
333, 316-1 On-Line Printer & Control 850
582 Tapes (2) 66Kc 1,750
394-1 & 2 Tape Adapters 1,376
-------
$ 22,306
RENTAL RATES
BASIC
MODEL TYPICAL MONTHLY
NR. SCIENTIFIC SYSTEM RENTAL
3304 BASIC PROCESSOR $ 11,675
404, 3361-3 Memory Increment 2,500
581 Tapes (5) 33KC 3,150
324, 3329 Card Reader & Control 660
3436, 3336 Card Punch & Control 1,600
333, 3333 On-Line Printer & Control 1,575
--------
$ 21,160
PERSONNEL REQUIREMENTS
Personnel requirements vary in accordance with thecomplexity of the
problem and the configuration of the equipment.
RCA offers, without charge to the user, courses in the application and
use of the RCA 3301 Realcom System. RCA provides training of personnel
or user representatives in systems analysis courses, programming
courses, special purpose courses, and operators courses. A continuous
education program is also provided.
CHECKING FEATURES
The machine design of the 3301 Realcom system utilizes techniques
tested and proven in the RCA 301 and RCA 601 Computers. Logic design
of the RCA 3301 Realcom was enhanced by use of RCA 501 computer
programs to check and validate design requirements.
ADDITIONAL FEATURES AND REMARKS
A single system can handle communications, realtime, random access,
scientific and serial data processing requirements.
Building block concept on a functional basis is standard in both
hardware and software systems.
Software design permits changes in computer usage without the
requirement of user reprogramming.
Production and real-time programs can operate simultaneously.
Automatic priority interrupt feature facilitates simultaneous program
operation and error detection and recovery.
Variable item and record length with word capabilities.
Indirect addressing and indexing are standard. Multiply and divide,
and editing features are standard.
Transfer between the disk file and the high-speed memory occurs in a
simultaneous mode at 32,000 characters/second.
The Communications Mode Control permits on-line data input-output
transmission between the RCA 3301 computer and various remote devices
utilizing the standard communications line facilities. The CMC permits
the servicing of 20, 40, 60, 80, 100, 120,140 or 160 buffer-terminated
communication lines. An additional mode of simultaneity permits the
transfer of data either way between the Processor and the lines to be
time-shared with other input-output and compute operations.
The Data Exchange Control permits long distance communicate with
either another RCA 3301 or an RCA 301. Data transmission may be in
either direction, one direction, one direction at a time. Two DXC's
may be included in an RCA 3301 System. Data transfer rate is up to
266,666 characters/second.
| BRL 1964, RCA 3301 REALCOM, starting page 0233
|
Diagram by Radio Corporation of America
| BRL 1964, RECOMP III, starting page 0234
|
RECOMP III
MANUFACTURER
Autonetics Div of North American Aviation
Photo by Autonetics Division
APPLICATIONS
General purpose computing.
PROGRAMMING AND NUMERICAL SYSTEM
Internal number system Binary
Binary digits/word 40 including sign
Binary digits/instruction 20
Instructions/word 2
Instructions decoded 54
Includes 4 optional floating point instructions.
Arithmetic system Fixed and floating point
Floating point is optional and fixed point is standard.
Instruction type One address
Number range - (239-1) to + (239-1)
Instruction word format
+------+------+---------+---------+-----------+-------+-----+---------+---------+-----------+
| 1 | 6 | 6 | 6 | 1 | 1 | 6 | 6 | 6 | 1 |
+------+------+---------+---------+-----------+-------+-----+---------+---------+-----------+
| Sign | OP | Channel | Sector | 1/2 | Index | OP | Channel | Sector | 1/2 |
| | Code | Address | Address | Word | |Code | Address | Address | Word |
| | | | | Indicator | | | | | Indicator |
+------+------+---------+---------+-----------+-------+-----+---------+---------+-----------+
| 1st Instruction | 2d Instruction |
+---------------------------------------------+---------------------------------------------+
Automatic built-in subroutines
Boostrap Loading Subroutine
Diagnostic Program
Automatic coding
FORTRAN Compiler
RIP 3000 Interpreter
G-15 Intercom Translator
Registers and B-Boxes
A Register - Accumulator
B Register - Number Register
G Register - Location and Index Register
R Register - Lower Accumulator
Z Register - Instruction Register
Two 8 word fast access registers
| BRL 1964, RECOMP III, starting page 0235
|
ARITHMETIC UNIT
Incl. Stor. Access Excl. Stor. Access
Microseconds Microseconds
Fixed Point Fixed Pt. Floating Pt.
Add 9,440 (Avg) 540 1,100
Mult 19,700 (Avg) 10,800 12,400
Div 20,000 (Avg) 11,100 12,200
Construction (Arithmetic unit only)
Transistors and Condenser-Diodes
Arithmetic mode Serial
Timing Asynchronous
Operation Sequential
STORAGE
No. of Average Access
Medium Words Microsec
Magnetic Disk 4,096 8,900
Magnetic Disk 16 2,160
INPUT
Medium Speed Remarks
Typewriter Manual Flexowriter
Paper Tape 10 chars/sec Flexowriter
Paper Tape 600 chars/sec Facit Punch
(Stops on character)
Punched Card 20 columns/sec
(Skips columns at 80 columns/second).
Handles 5, 6, 7, or 8 channel paper tapes.
Handles 4 input devices without modification.
OUTPUT
Medium Speed Remarks
Typewriter 10 chars/sec Flexowriter
Paper Tape 10 chars/sec Flexowriter
Paper Tape 150 chars/sec Facit Punch
Punched Card 20 columns/sec
Point Plotter
X axis 200 increments/sec (Max)
Y axis 200 increments/sec (max)
Z axis 10 operations/sec (Max)
Handles 4 output devices without modification
CHECKING FEATURES
Fixed:
Single operation mode.
Permanently recorded diagnostic program. Optional:
Recomp Systems Tester - Displays states of all flip-flops,
provides for marginal voltage test and logic checking.
POWER, SPACE, WEIGHT, AND SITE PREPARATION
Power, computer 0.40 KVA 0.9 pf 3.5A at 115 V. AC
Volume, computer 31.0 cu ft
Area, computer 12.5 sq ft
Room size required Normal desk area
Weight, computer 395 lbs
PRODUCTION RECORD
Number produced to date 40
Number in current operation 30
PERSONNEL REQUIREMENTS
The system may be operated by office or engineering
personnel with a minimum of training.
ADDITIONAL FEATURES AND REMARKS
Small size, low cost, versatile. Simplicity of programing and
aeration. Large library of available programs. SPARC III
Program for Automatic Circuit Design Analysis.
| BRL 1964, RPC 4000, starting page 0236
|
RPC 4000
(Formerly Royal McBee Corp. RPC 4000)
MANUFACTURER
Librascope Div., General Precision Inc.
Photo by Librascope Div., General Precision Inc.
APPLICATIONS
General purpose, simple to operate, low cost computer and data
processor with large internal memory.
PROGRAMMING AND NUMERICAL SYSTEM
Internal number system Binary
Binary digits/word 32
Binary digits/instruction 5
Instructions/word One
Instructions decoded 36 + Variation
Arithmetic system Fixed point
Floating point Programmed
Instruction type Two-address
Number range + 1 to - 1
Instruction word format
+-------+--------------+-----------+------------+
| 0 4 | 5 17 | 18 30 | 31 |
+-------+--------------+-----------+------------+
| Order | Data Address | Next Add. | Index Flag |
+-------+--------------+-----------+------------+
Automatic coding
FORTRAN
Act IV
PINT
Registers and B-Boxes
1 Index
2 Accumulators, 1 of which extends to 8 words in length.
Word recirculating
ARITHMETIC UNIT
Incl. Stor. Access Excl. Stor. Access
Microsec Microsec
Add 1,040 260
Mult 17,420 16,380
Div 17,420 16,380
A multiply by 10 is accomplished in 260 micro sec.
Construction (Arithmetic unit only)
Vacuum-tubes 0
Transistors 197
Condenser-diodes 540
Magnetic cores 0
Arithmetic mode Serial
Timing Synchronous
Operation Sequential
| BRL 1964, RPC 4000, starting page 0237
|
STORAGE
No. of No. of Bin. Aver. not Optimum
Medium Words Digits/Word Access Microsec
Drum 8,008 32 8,320
INPUT
Medium Speed
Paper Tape 500 chars/sec
Manual 10 chars/sec
OUTPUT
Medium Speed
Paper Tape 300 chars/sec
Typewriter 12 chars/sec
CIRCUIT ELEMENTS OF ENTIRE SYSTEM
Type Quantity
Tubes 0
Diodes 4,500
Transistors 500
Magnetic Cores 0
CHECKING FEATURES
Parity on input.
POWER, SPACE, WEIGHT, AND SITE PREPARATION
Power, computer 1 Kw 1 KVA 1 pf
Air conditioner None
Volume, computer 60 cu ft
Area, computer 15 sq ft
Floor loading 33 lbs/sq ft
Weight, computer 500 lb
No special site preparation required.
PRODUCTION RECORD
Number produced to date 115
Number in current operation 104
Number on order 4
Time required for delivery 1 to 2 months
PERSONNEL REQUIREMENTS
One operator is required for an 8-hour shift.
Training is made available by the manufacturer to the user.
RELIABILITY, OPERATING EXPERIENCE
Mainframe 95% uptime (average)
Peripheral 90%o uptime (average)
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