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The drum memory held 1K of 40-bit words. The computer was programmed using binary machine code instructions. When programming the 1201, the machine code instructions were not sequential but were spaced to allow for the drum's rotation. This ensured the next instruction was passing under the drum's
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machine from
Ferranti's Canadian subsidiary, which was considerably more advanced than the existing 130x line. It was decided to adapt this machine to use the 'Standard Interface', and it was put on the market as the
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allowing much more flexibility in peripheral configuration. The 'Standard
Interface' was originally prototyped on the 1301 and went on to be used on the 1900 series.
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ran at 1 MHz. The London
University machine still exists (January 2006) and is being reinstated to working condition by a group of enthusiasts.
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244:. Output was to 80-column punched cards, printer and optionally to punched paper tape. The first customer delivery was in 1962, a 1301 sold to the
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The ICT 1400 was a first generation computer using thermionic valves, but was overtaken by transistor technology in 1959 and no sales were made.
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company into
International Computers and Tabulators, Ltd. (ICT), and the merger in 1968 of
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8:
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384:, reviews the history of the British computer industry, including the merger in 1959 of
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248:. One of their main attractions was that they performed British currency calculations (
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was devised after the acquisition of
Ferranti's assets which brought in the new
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was a
British computer manufacturer, formed in 1959 by a merger of the
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had no binary mode, only decimal or pounds, shillings and pence. Its
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155:. It exported computers to many countries and in 1968 became part of
380:, University of Minnesota. Humphreys, a former managing director of
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Corporation, who called it the RCA 301. RCA also sold the design to
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School of computer science and information systems: A short history
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198:. Before the merger, under BTM, this had been known as the HEC4 (
329:, the first in a range of upward-compatible computer systems.
287:. It also used the 'Standard Interface' for the connection of
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read heads just as the current instruction had been executed.
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system capable of running three programs in addition to the
236:, and optionally one-inch-, half-inch- or quarter-inch-wide
475:, 50 years of Computing, UK: Birkbeck School of Computing,
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Computing
Services Division who designed and produced it.
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Oral history interview with Arthur L. C. Humphreys (1981)
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151:. In 1963 it acquired the business computer divisions of
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in France who called it the Gamma 30. It used a six-bit
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and had core stores of 10,000, 20,000 or 40,000 bytes.
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Defunct technological companies of the United
Kingdom
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Defunct manufacturing companies of the United
Kingdom
279:, used similar technology to the 1300/1301 but was a
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The ICT 1500 series was a design bought in from the
48:. Unsourced material may be challenged and removed.
508:Defunct computer companies of the United Kingdom
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558:Manufacturing companies disestablished in 1968
538:Former defence companies of the United Kingdom
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419:Two articles on the HEC4 at Morgan Crucible Co
352:was in the process of making a line of large
553:Manufacturing companies established in 1959
442:ICL : a business and technical history
336:, itself formed from the prior mergers of
548:Electronics companies established in 1959
108:Learn how and when to remove this message
578:British companies disestablished in 1968
194:and output was to 80-column cards and a
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57:"International Computers and Tabulators"
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171:computer before the acquisition of the
543:Computer companies established in 1959
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482:from the original on 23 September 2015
202:Electronic Computer, fourth version).
137:International Computers and Tabulators
573:British companies established in 1959
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356:-compatible mainframes based on the
46:adding citations to reliable sources
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518:Defunct computer hardware companies
186:technology and its main memory was
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523:Defunct computer systems companies
386:British Tabulating Machine Company
145:British Tabulating Machine Company
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568:1968 disestablishments in England
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348:(ICL). At the time of the merger
414:The National Museum of Computing
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513:International Computers Limited
439:Campbell-Kelly, Martin (1989).
346:International Computers Limited
344:. The resulting company became
157:International Computers Limited
33:needs additional citations for
563:1959 establishments in England
364:which was introduced in 1974.
167:The ICT 1101 was known as the
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410:ICT 1301 Resurrection Project
213:, and its smaller cousin the
338:English Electric Leo Marconi
7:
445:. Oxford University Press.
406:– archived in November 2006
307:Compagnie des Machines Bull
250:pounds, shillings and pence
190:. Input was from 80-column
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132:ICT share certificate, 1961
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394:English Electric Computers
350:English Electric Computers
334:English Electric Computers
378:Charles Babbage Institute
264:was pure decimal and the
421:– archived in April 2014
404:Boards from the ICT 1301
332:In 1968 ICT merged with
466:Johnson, Roger (2008),
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396:Limited and ICT into
322:Ferranti-Packard 6000
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124:ICT logo, early 1960s
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246:University of London
42:improve this article
342:Elliott Automation
260:arithmetic as the
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452:978-0-19-853918-6
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40:Please help
35:verification
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340:(EELM) and
289:peripherals
226:core memory
222:transistors
169:EMIDEC 1100
502:Categories
426:References
242:paper tape
147:(BTM) and
68:newspapers
285:Executive
219:germanium
200:Hollerith
477:archived
388:and the
327:ICT 1904
277:ICT 1302
215:ICT 1300
211:ICT 1301
180:ICT 1201
163:Products
153:Ferranti
98:May 2010
486:17 July
303:Siemens
217:, used
196:printer
159:(ICL).
82:scholar
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270:clock
258:octal
89:JSTOR
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488:2024
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316:The
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232:was
224:and
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61:news
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382:ICL
299:RCA
256:or
173:EMI
141:ICT
139:or
44:by
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