210:
222:
20:
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183:
The standard
Operating System was REX (RealTime Exec), except at Eastern and B.E.A. where a custom operating system was developed for airline reservations (CONTORTS – CONTrol Of Real Time System). CONTORTS was the origin of Univac's subsequent RT operating systems for 494 (STARS) and later converted
605:
In June 1965, UNIVAC launched a family of successor systems known as the UNIVAC 490 Modular Real Time
Systems. This consisted of the UNIVAC 491, 492 and 494. The 494 was heavily used by NASA as part of the communications complex for the Apollo Mission. Other users include BEA,
180:. It has six banks of memory cores. System Source also has a nearly complete set of original documentation for the machine, including original blueprints and troubleshooting data. This includes the Boss and Wilen document.
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The only surviving, nearly complete, original, civilian version of the 490 Real Time System is on display at System Source in
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24:
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for the US Navy. This was the last machine that Cray designed before leaving UNIVAC to join the early
406:
138:
106:
At least 47 of these machines were made (serial numbers run from 101 to 147). Six were installed at
625:
an option to run the 1110/80 in 494 mode was added. This emulator was implemented using microcode.
150:
60:
847:"On the origins of the Airline's Electronic Reservations Systems. A grandfather's story (Part I)"
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36:
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118:
missions. The U490 had complete control of most or all of the data readout screens in
71:
890:
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153:(BEACON – 1964). Other commercial installations of the 490 Real-Time included two at
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Also
Innovators: How one computer salesman contributed to the digital revolution
568:
170:
115:
111:
936:
794:. Office of Naval Research, Mathematical Sciences Division. 1966. p. 24.
805:
Astronautics, United States
Congress House Committee on Science and (1967).
19:
918:
56:
682:
Univac 490 Failure
Finding by L. D. Boss and J. G. Wilen, August 10, 1964.
361:
79:
40:
162:
634:
615:
425:
87:
67:
52:
66:
Univac
Federal Systems would further developed this system into the
142:
701:
Resurrection - the
Journal of the Computer Conservation Society
200:
A circuit board from the UNIVAC 490 computer on display at the
44:
158:
107:
886:
The
Practical Real-Time Enterprise: Facts and Perspectives
215:
The Univac 1232 was a military version of the UNIVAC 490.
577:
One Q-register and auxiliary arithmetic register 30 bits
559:
The machine provided the programmer with the following
889:. Springer Science & Business Media. p. 86.
545:
b – Operand address modification designator (3 bits)
694:"Beacon 1963-7: A System Design Ahead of its Time?"
157:, two at Hammermill Paper Company, and one each at
82:. The military version went by a variety of names:
78:which pioneered the use of shipboard computers for
883:Kuglin, Bernd; Thielmann, Heinz (15 August 2005).
133:Airlines using the 490 Real-Time system included
934:
882:
621:Subsequently as UNIVAC decided to focus on the
872:. IDG Enterprise. 15 January 1979. p. 84.
542:k – Operand-interpretation designator (3 bits)
513:
804:
678:
676:
674:
520:
506:
834:. Bureau of International Commerce. 1968.
722:Yardley, Christopher B. (30 April 2019).
671:
539:j – Branch condition designator (3 bits)
47:. It was a commercial derivative of the
18:
721:
935:
691:
755:
574:One A-register or accumulator 30 bits
567:Seven B-registers (Address modifying
536:f – Function code designator (6 bits)
600:
586:Construction (Arithmetic unit only)
74:. That system was the heart of the
39:machine with 16K or 32K words; 4.8
13:
844:
14:
954:
907:
548:y – Operand designator (15 bits)
246:Computer architecture bit widths
220:
208:
193:
51:that had been developed for the
876:
860:
838:
692:Knight, Michael (Summer 2008).
596:Transistors 13,819 All types
593:Diodes 37,543 All types
238:
25:Ballistic Research Laboratories
822:
798:
782:
771:
756:Mayes, Phil (5 January 2016).
749:
728:. ANU Press. pp. 24, 27.
715:
685:
657:
110:and played important roles in
1:
928:System Source Computer Museum
650:
645:History of computing hardware
532:The instruction word format:
232:National Air and Space Museum
552:Numbers were represented in
7:
914:UNIVAC 490 Real-Time System
791:Digital Computer Newsletter
778:UNIVAC 490 Real-Time System
628:
581:
101:
10:
959:
943:UNIVAC mainframe computers
126:had two installed, as did
76:Naval Tactical Data System
16:Mid-20th century computer
151:British European Airways
145:reservations systems at
61:Control Data Corporation
665:"Computer, UNIVAC 1232"
640:List of UNIVAC products
623:UNIVAC 1100/2200 series
590:Type Quantity
120:Houston Mission Control
831:International Commerce
470:Decimal floating-point
28:
612:Scandinavian Airlines
407:Binary floating-point
227:A Univac 1232 at the
178:Hunt Valley, Maryland
22:
758:"Univac 494s at BEA"
37:magnetic-core memory
23:A UNIVAC 490 at the
43:cycle time made by
919:UNIVAC 490 manuals
72:United States Navy
35:was a 30-bit word
29:
896:978-3-540-27367-7
735:978-1-76046-299-4
601:Successor Systems
530:
529:
147:Eastern Air Lines
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554:ones' complement
522:
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202:Deutsches Museum
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139:Northwest Orient
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845:Garcia, Pedro.
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608:Iberia Airlines
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569:index registers
526:
497:
464:
401:
366:
241:
234:
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167:Bethlehem Steel
104:
49:instruction set
17:
12:
11:
5:
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908:External links
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571:) 15 bits each
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171:General Motors
141:– principally
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27:, Maryland, US
15:
9:
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911:
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869:Computerworld
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850:. Retrieved
840:
830:
824:
812:. Retrieved
807:
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790:
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761:. Retrieved
751:
739:. Retrieved
724:
717:
705:. Retrieved
700:
687:
659:
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604:
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558:
551:
531:
306:
239:Architecture
182:
175:
155:Westinghouse
132:
105:
95:
91:
83:
65:
57:Seymour Cray
32:
30:
703:(43): 24–33
372:Application
362:bit slicing
229:Smithsonian
186:1100 Series
149:(1963) and
84:UNIVAC 1232
80:air defense
41:microsecond
924:UNIVAC 490
651:References
163:U.S. Steel
33:UNIVAC 490
635:AN/USQ-17
616:Lufthansa
561:registers
473:precision
410:precision
88:AN/USQ-20
68:AN/USQ-20
53:AN/USQ-17
937:Category
808:Hearings
629:See also
582:Hardware
188:(RTOS).
128:Lockheed
114:and the
102:Overview
92:MIL-1206
70:for the
926:at the
184:to the
143:airline
135:Eastern
893:
732:
122:. The
116:Apollo
112:Gemini
45:UNIVAC
852:8 May
814:8 May
763:8 May
741:8 May
707:8 May
697:(PDF)
159:Alcoa
96:CP642
891:ISBN
854:2024
816:2024
765:2024
743:2024
730:ISBN
709:2024
614:and
461:(×8)
455:(×4)
444:(×2)
433:(×1)
422:(×½)
169:and
137:and
124:USAF
108:NASA
94:and
31:The
493:128
459:256
453:128
357:512
352:256
347:128
252:Bit
55:by
939::
699:.
673:^
618:.
610:,
563::
556:.
488:64
483:32
448:80
442:64
437:40
431:32
426:24
420:16
397:64
392:32
387:16
342:64
337:60
332:48
327:45
322:36
317:32
312:31
307:30
302:28
297:26
292:24
287:18
282:16
277:12
173:.
165:,
161:,
130:.
98:.
90:,
86:,
63:.
899:.
856:.
818:.
767:.
745:.
711:.
667:.
521:e
514:t
507:v
382:8
272:8
267:4
262:1
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
