Apparatus for carrying out macroinstructions in a microprogramme

Communications: electrical – Digital comparator systems

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G06F 914, G06F 918

Patent

active

039914046

ABSTRACT:
Apparatus for carrying out a set of macroinstructions by means of a microprogram in firmware. The apparatus controls the operating system of a digital computer which is adapted to carry out a set of macroinstructions. The macronistructions are carried out by means of a microprogram in firmware having a fetching phase and an execution phase. Both fetching and execution of macroinstructions are carried out by means of microprograms. One ROM is provided for storing a fetching and execution digital-word, associated with a macroinstruction and contains information relative to each phase respectively. Another ROM is provided for storing the actual microprograms for fetching and executing macroinstructions respectively.

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patent: 3781823 (1973-12-01), Senese
patent: 3792441 (1974-02-01), Wymore et al.
patent: 3839705 (1974-10-01), Davis et al.
patent: 3859636 (1975-01-01), Cook

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