Microcommand function switching circuit

Details Microcommand function switching circuit Microcommand function switching circuit

1992-04-08

1996-01-02

Harrell, Robert B.

Boots, shoes, and leggings

364DIG1, 364DIG2, 364245, 36424531, 3642624, 3642628, G06F 922

Patent

active

054816823

ABSTRACT:
To facilitate the expansion and addition of instruction functions and to reduce development costs and time for products comprising new functions, the microaddress and mask address of a microinstruction are compared by a microaddress comparing circuit. When they correspond, an extended micropointer for generating an extended microaddress is selected by a pointer selecting circuit so as to access extended microinstruction memory in place of the micropointer and to exchange the function of a microinstruction specified by a microaddress with the function of an extended microinstruction.

REFERENCES:
patent: 4093982 (1978-06-01), Heuer et al.
patent: 4104720 (1978-08-01), Gruner
patent: 4236210 (1980-11-01), Terakawa et al.
patent: 4503500 (1985-03-01), Magar

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