Microprogram organization techniques

Details Microprogram organization techniques Microprogram organization techniques

1974-11-05

1976-11-02

Shaw, Gareth D.

Communications: electrical

Digital comparator systems

G06F 906, G06F 1300

Patent

active

039900541

ABSTRACT:
The disclosure describes improved microprogramming apparatus for a data processor. The improved apparatus includes a translating diode matrix which translates the operation code of a macroinstruction being executed into a predetermined address of a microinstruction stored in a read-only memory. For each operation code being executed, the translating diode matrix is capable of reading two different microinstructions held at two different addresses. This technique enables the sharing of microinstructions by macroinstructions requiring common execution techniques. Logic circuitry is also provided to enable conditional branching of the microprogram.

REFERENCES:
patent: 3325788 (1967-06-01), Hackl
patent: 3391394 (1968-07-01), Ottaway
patent: 3736563 (1973-05-01), Beckinger
patent: 3766532 (1973-10-01), Liebel
patent: 3781823 (1973-12-01), Senese
patent: 3800293 (1974-03-01), Enger
patent: 3839705 (1974-10-01), Davis
patent: 3886523 (1975-05-01), Ferguson

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