FOCUS microcomputer number system
- 1 March 1979
- journal article
- Published by Association for Computing Machinery (ACM) in Communications of the ACM
- Vol. 22 (3) , 166-177
- https://doi.org/10.1145/359080.359085
Abstract
FOCUS is a number system and supporting computational algorithms especially useful for microcomputer control and other signal processing applications. FOCUS has the wide-ranging character of floating-point numbers with a uniformity of state distributions that give FOCUS better than a twofold accuracy advantage over an equal word length floating-point system. FOCUS computations are typically five times faster than single precision fixed-point or integer arithmetic for a mixture of operations, comparable in speed with hardware arithmetic for many applications. Algorithms for 8-bit and 16-bit implementations of FOCUS are included.Keywords
This publication has 13 references indexed in Scilit:
- Multiplication Using Logarithms Implemented with Read-Only MemoryIEEE Transactions on Computers, 1975
- Significance arithmetic: The carrying algorithmJournal of Combinatorial Theory, Series A, 1973
- High-speed binary multiplierElectronics Letters, 1971
- Fully iterative fast array for binary multiplication and additionElectronics Letters, 1969
- Suggestion for an i.c. fast parallel multiplierElectronics Letters, 1969
- Error Estimation in Computer CalculationThe American Mathematical Monthly, 1965
- An example in “significant-digit” arithmeticCommunications of the ACM, 1964
- Significance arithmetic on a digital computerCommunications of the ACM, 1963
- Unnormalized Floating Point ArithmeticJournal of the ACM, 1959
- Significant Digit Computer ArithmeticIEEE Transactions on Electronic Computers, 1958