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BURROUGHS B260/B270/B280
MANUFACTURER
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
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COMPONENTS OF BASIC SYSTEM COST OF COMPONENTS
B-260 B-270 B-280 Weight
B260/B27O/B28O Processor $ 51,000 $ 56,100 $ 55,475 1,200
B124 Card Reader 15,200 15,200 15,200 300
B304 Card Punch 27,000 27,000 27,000
B321 Line Printer 49,800 49,800 49,800 1,750
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
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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
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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.
Burroughs B 270 Photo by Burroughs Corporation
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
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.
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