Hexadecimal digit shifter output control by a programmable read

Details Hexadecimal digit shifter output control by a programmable read Hexadecimal digit shifter output control by a programmable read

1979-11-09

1981-10-13

Smith, Jerry

Boots, shoes, and leggings

364744, G06F 748

Patent

active

042952026

ABSTRACT:
A Scientific Instruction Processor (SIP) uses a Programmable Read Only Memory (PROM) to control the output of a two stage shifter. The shifter performs the necessary mantissa shift operations of shift right, shift left, shift right around, as well as inserting certain constant information into the system. Control signals and shift signals applied to the input address terminals of the PROM select the PROM output signals which enable the selected mantissa hexadecimal digits which output the shifter. This forces hexadecimal digits from the enabled positions and hexadecimal ZERO digits in those positions not enabled.

REFERENCES:
patent: 3234368 (1966-02-01), Kregness
patent: 3454750 (1969-07-01), Shimabukuro
patent: 3692990 (1972-09-01), Kurokawa et al.
patent: 3829673 (1974-08-01), Bouton, Jr. et al.
patent: 4130879 (1978-12-01), Cushing

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