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260:, with no clock. Each unit generated an "answer-back" or "I'm ready" signal, which permitted the output to be used or the next step taken. Most computers designed since then are "synchronous", meaning after a certain number of clock cycles the unit is finished with the pending operation, for example an addition.
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The
Cyclone had a loudspeaker system connected to the sign bit of the accumulator. Operators or monitors could listen for an infinite loop or particular program. When the computer was finished, the memory exerciser program was started, which had a distinctive sound - signaling others that the machine
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was an economics graduate student and also wrote test programs and utilities during and after the development of the second version of the
Cyclone. LaFarr wrote the assembler in machine code as there was no machine for a cross assembler. Also wrote a music program, see External links.
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The
Cyclone computer was 10 feet tall, 12 feet long, 3 feet wide, and contained over 2,700 vacuum tubes. It used 19 kW of electric power and weighed about 5,000 pounds (2.5 short tons; 2.3 t). "Good time" was about 40 hours per week.
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The only input device was the paper tape reader and the only outputs were the console printer and paper tape punch. As the paper tape punch was much faster than the printer, most output was punched, and then listed on an off-line printer.
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input was upgraded with an optical character reader using a high-speed stepper motor, again by a person from the
Physics Department. Robert Asbury Sharpe organized and taught courses for interested faculty and wrote an
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and a 12-bit operand or address field. In general IAS-based computers were not code compatible with each other, although originally math routines which ran on the ILLIAC would also run on the
Cyclone.
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2) "A Fourth Survey of
Domestic Electronic Digital Computing Systems" Report No. 1227, January 1964 by Martin H. Weik, published by Ballistic Research Laboratories, Aberdeen Proving Ground, Maryland
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1) "A Third Survey of
Domestic Electronic Digital Computing Systems" Report No. 1115, March 1961 by Martin H. Weik, published by Ballistic Research Laboratories, Aberdeen Proving Ground, Maryland
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The
Cyclone was completed just as the transistor was replacing the vacuum tube as an active computing element. The Cyclone had about 2,500 vacuum tubes, 1,521 of which were type 5844. (The
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There were no index registers. To access sequential data in a loop, programs used address modification in the instructions instead of incrementing or decrementing an index.
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Automatic
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The supervisor of the
Cyclone computer construction was Dr. R. M. Stewart, a professor of physics at ISC (now ISU). The
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The Cyclone solved 40 equations with 40 unknowns in less than four minutes. This was the same type of problem that the
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computer, announced the same year, was fully transistorized. About 15,000 IBM 1401 machines were produced.)
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151:(later University) at Ames, Iowa. The computer was commissioned in July 1959. It was based on the
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was available. Speakers were placed in offices and work areas for convenience.
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Five-hole paper tape was replaced by an eight-hole tape reader/punch.
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was designed to solve twenty years earlier at the same college.
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1024-word Williams memory was replaced by four banks of
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Iowa State University, Computer Technology Research
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237:The console printer was upgraded to an eight-hole
27:Vacuum tube computer built by Iowa State College
1160:History of computing hardware (1960s–present)
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353:Iowa State University, CS Department History
275:The Iowa State Cyclone is distinct from the
252:Both versions had features and limitations:
230:The Cyclone had a major rebuild about 1961:
222:Memory was originally 1,024 40-bit words of
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212:Input and output via five-hole paper tape.
127:Learn how and when to remove this message
343:BRL BRL Report No. 1227, January 1964
7:
1165:List of pioneers in computer science
65:adding citations to reliable sources
25:
1063:Computers built 1955 through 1978
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338:BRL Report No. 1115, March 1961
52:needs additional citations for
1:
1155:History of computing hardware
279:of the late 1930s - neither
256:All IAS derivatives used an
159:. The Cyclone was based on
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1186:IAS architecture computers
1005:University of Pennsylvania
248:, 4096 words in each bank.
208:The original Cyclone had:
194:compiler for the Cyclone.
155:architecture developed by
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908:IBM vacuum tube computers
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287:worked on this machine.
277:Atanasoff–Berry Computer
199:Atanasoff–Berry Computer
32:Cyclone (disambiguation)
1096:UNIVAC family computers
1049:Sperry Rand Corporation
590:Soviet computer systems
76:"Cyclone" computer
772:University of Illinois
281:John Vincent Atanasoff
165:University of Illinois
1191:Iowa State University
226:electrostatic memory.
1143:Vacuum-tube computer
246:magnetic-core memory
145:vacuum-tube computer
61:improve this article
30:For other uses, see
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567:Electronika SS VLSI
833:Harvard University
239:Friden Flexowriter
149:Iowa State College
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78: –
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72:Find sources:
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50:This article
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493:Soviet Union
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59:Please help
54:verification
51:
570: [
553: [
541: [
524: [
512: [
297:IAS machine
217:Teleprinter
215:A model 28
147:, built by
1180:Categories
1061:See also:
798:ILLIAC III
716:MUSASINO-1
611:IAS family
394:Mainframes
313:References
183:paper-tape
87:newspapers
1057:UNIVAC II
918:305 RAMAC
804:ILLIAC IV
792:ILLIAC II
751:FACOM 201
704:MANIAC II
401:Australia
188:assembler
117:June 2012
1091:See also
1073:Raytheon
1038:UNIVAC I
976:AN/FSQ-8
971:AN/FSQ-7
816:ILLIAC 6
786:ILLIAC I
698:MANIAC I
650:JOHNNIAC
583:See also
291:See also
176:IBM 1401
1124:Related
734:Cyclone
728:EDB-2/3
686:SILLIAC
644:IBM 701
538:PS-3000
533:PS-2000
509:ES-2701
408:SILLIAC
169:op-code
141:Cyclone
101:scholar
18:CYCLONE
1116:(1943)
1083:(1953)
1081:RAYDAC
1040:(1951)
1034:(1949)
1015:(1945)
861:(1952)
855:(1949)
849:(1947)
843:(1944)
824:(2006)
818:(2005)
812:(1988)
806:(1965)
800:(1966)
794:(1958)
788:(1952)
782:(1952)
780:ORDVAC
759:(1964)
753:(1960)
736:(1959)
730:(1957)
724:(1957)
718:(1957)
712:(1957)
710:MISTIC
706:(1956)
700:(1956)
694:(1956)
688:(1956)
682:(1957)
676:(1955)
670:(1955)
668:WEIZAC
664:(1952)
662:ORDVAC
658:(1953)
656:ORACLE
652:(1953)
646:(1953)
640:(1953)
634:(1953)
632:AVIDAC
628:(1952)
626:ILLIAC
562:Elbrus
504:BESM-6
485:(1964)
479:(1957)
473:(1956)
467:(1957)
458:Sweden
450:(1949)
444:(1954)
427:(1955)
425:WEIZAC
418:Israel
410:(1956)
163:, the
161:ILLIAC
103:
96:
89:
82:
74:
1032:EDVAC
1013:ENIAC
810:CEDAR
757:TRASK
744:1960s
722:EDB-1
619:1950s
574:]
557:]
545:]
528:]
516:]
483:TRASK
477:EDB-1
448:FUJIC
442:FACOM
435:Japan
192:ALGOL
143:is a
108:JSTOR
94:books
1148:list
1136:list
1024:EMCC
963:SAGE
692:SMIL
680:SARA
674:DASK
638:BESK
521:Mars
471:SMIL
465:SARA
283:nor
139:The
80:news
953:709
948:705
943:704
938:702
933:701
928:650
923:610
869:IBM
550:SVS
323:3)
153:IAS
63:by
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572:ru
555:ru
543:ru
526:ru
514:ru
901:e
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105:·
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