Microprogram unit for a data processor

Details Microprogram unit for a data processor Microprogram unit for a data processor

1974-07-12

1976-09-07

Shaw, Gareth D.

Communications: electrical

Digital comparator systems

G06F 916

Patent

active

039797295

ABSTRACT:
In a microprogram unit, an index store is provided to translate index addresses, derived from input instructions, into start addresses for microprogram routines. Thus, if microprogram routines have to be re-ordered within the microprogram store, it is only necessary to modify the contents of the index store, and further modifications to the microprogram unit, or to the input instructions, are not necessary. Start addresses may be derived in an overlapped manner, so as to increase processing speed.

REFERENCES:
patent: 3391394 (1968-07-01), Ottaway et al.
patent: 3766532 (1973-10-01), Liebel, Jr.
patent: 3781823 (1973-12-01), Senese
patent: 3839705 (1974-10-01), Davis et al.
patent: 3930236 (1975-12-01), Ferguson et al.

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