FOCUS microcomputer number system

Authors:
Albert D. Edgar;Samuel C. Lee
Affiliations:
The Univ. of Oklahoma, Norman;The Univ. of Oklahoma, Norman
Venue:
Communications of the ACM
Year:
1979

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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.