"An Assessment of the System of Optimum Coding Used on the Pilot Automatic Computing Engine at the National Physical Laboratory." [In] Philosophical Transactions of the Royal Society of London. Series A. Mathematical and Physical Sciences. No. 946. Vol. 248. pp. 253-281. 20 October 1955.
Published by London: The Royal Society, 1955
- First Edition
- Used
Seller: Peter Harrington. ABA/ ILAB., London, United KingdomPeter Harrington. ABA/ ILAB.
AbeBooks seller since July 26, 1999
Condition: Used
£ 1,250.00
Quantity: 1 available
Add to basketItem description from seller
First edition, offprint issue, of this report on improvements in optimum programming made to the Pilot ACE computer, the prototype built from Alan Turing's ACE design. Wilkinson (1919-1986) was Turing's assistant at the National Physical Laboratory and took over the project upon his departure in 1948. Although only built as a prototype, the lack of better technology meant that the Pilot ACE was put into service in 1951. It needed continual improvements, including these on the arrangement of instructions in mercury delay lines. "One problem was that once the machine has finished executing an instruction, the next instruction is certain to still be somewhere in the delay mechanism, and the machine will have to wait until it emerges. It is possible to overcome this problem by including an extra address in each instruction that specifies the location of the next instruction. Rather than storing instructions sequentially in memory, it is possible to store them in locations such that the next one to be executed is just about to exit from the delay line as it is needed. The system resulted in an increase of execution speed of a factor between 2 and 10" (Tomash & Williams). Tomash & Williams W76. Quarto, pp. 32. Diagrams. Original light green printed wrappers. Wrappers lightly soiled and creased, head of spine starting: in very good condition.…
Seller Inventory # 150548
Bibliographic details
- Title
- "An Assessment of the System of Optimum Coding Used on the Pilot Automatic Computing Engine at the National Physical Laboratory." [In] Philosophical Transactions of the Royal Society of London. Series A. Mathematical and Physical Sciences. No. 946. Vol. 248. pp. 253-281. 20 October 1955.
- Author
- WILKINSON, James Hardy.
- Publisher
- London: The Royal Society, 1955
- Edition
- 1st Edition
Peter Harrington. ABA/ ILAB.
London, United Kingdom
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Peter Harrington Antiquarian Bookseller has grown to become one of the largest and best known rare booksellers in Europe. Member of the ABA and ILAB. Visit us in the UK at 100 Fulham Road, Chelsea, London SW3 6HS Phone +44 (0)20 7591 0220 Fax +44 (0)20 7225 7054 www.peterharrington.co.uk
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