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Alan Turing's Automatic Computing EngineThe Master Codebreaker's Struggle to build the Modern Computer$
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B. Jack Copeland

Print publication date: 2005

Print ISBN-13: 9780198565932

Published to Oxford Scholarship Online: January 2008

DOI: 10.1093/acprof:oso/9780198565932.001.0001

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The Pilot ACE: from concept to reality

The Pilot ACE: from concept to reality

Chapter:
(p.223) 11 The Pilot ACE: from concept to reality
Source:
Alan Turing's Automatic Computing Engine
Author(s):

Robin A. Vowels

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198565932.003.0012

This chapter discusses the development of the Pilot ACE, including the architecture, programming, and performance. The Pilot ACE was a general purpose computer of the serial type, with a clock frequency of 1 MHz. The word size was 32 bits, and dual arithmetic units were provided. One arithmetic unit supported 32-bit numbers (about 9 decimal digits), while the other was for 64-bit numbers (about 19 decimal digits). The 64-bit accumulator was also capable of functioning as two independent 32-bit accumulators. The Pilot ACE had Hollerith 80-column punch-card input and output equipment, the input device running at 200 cards per minute and the output device at 100 cards per minute.

Keywords:   Pilot ACE, computing, computer, programming, architecture

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