40-bit computing
| Computer architecture bit widths |
|---|
| Bit |
| Application |
| Binary floating-point precision |
| Decimal floating-point precision |
In computer architecture, 40-bit integers, memory addresses, or other data units are those that are 40 bits wide. Also, 40-bit central processing unit (CPU) and arithmetic logic unit (ALU) architectures are those that are based on registers, address buses, or data buses of that size.
Examples
[edit]The IAS computer[1][2] and many of its derivatives such as AVIDAC[3]: 143 , BESK[4], ILLIAC I[2] , JOHNNIAC[2], MANIAC I[2], ORACLE[3]: 143 [2], ORDVAC[2], TIFRAC[5]: 425 , and WEIZAC[6]: 326 had 40-bit words.
References
[edit]- ↑ The History and Development of the Electronic Computer Project at the Institute for Advanced Study, Willis H. Ware, Santa Monica, CA: RAND Corporation, 1953, RAND paper P-377.
- 1 2 3 4 5 6 A Survey of Domestic Electronic Digital Computing Systems, Martin H. Weik, Aberdeen Proving Ground, MD: Ballistic Research Laboratories, Report No. 971, Dec. 1955.
- 1 2 "Argonne National Laboratory", M. K. Butler, in: Encyclopedia of Computer Science and Technology, eds. Jack Belzer, Albert G. Holzman and Allen Kent, vol. 2, orig. pub. New York, New York: Marcel Dekker, Inc., 1975, ISBN 0-8247-2252-3, LCCN 74-29436; reprinted 2019 by CRC Press (Taylor & Francis), ISBN 9780367810818 (e-book.)
- ↑ "Some Computer Developments in Sweden", Mortimer Datz, pp. 16-22 in Computers and Automation, vol. 8, no. 11 (Nov. 1959.)
- ↑ "TIFRAC, India's First Computer - A Retrospective", P V S Rao, Resonance Journal of Science Education, pub. Indian Academy of Sciences / Springer Nature, vol. 13, #5 (May 2008), pp. 420-429.
- ↑ "The WEIZAC Years (1954-1963)", G. Estrin, IEEE Annals of the History of Computing, vol. 13, no. 4, pp. 317-339, Oct.-Dec. 1991.
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