Microprogrammed control of extended integer and commercial instr

Details Microprogrammed control of extended integer and commercial instr Microprogrammed control of extended integer and commercial instr

1981-12-01

1985-01-01

Atkinson, Charles E.

Boots, shoes, and leggings

G06F 926

Patent

active

044919085

ABSTRACT:
A data processing system includes a microprogram controlled central processing unit that executes instructions. The instruction words include a data type field for identifying the type of operand processed during the execution of the instruction. The data type field signals and a number of control signals are applied to the address terminals of a read only memory. The read only memory output signals are tested by microwords of a microprogram to branch to firmware routines to process the operand type.

REFERENCES:
patent: 4021655 (1977-05-01), Healey et al.
patent: 4128876 (1978-12-01), Ames et al.
patent: 4236206 (1980-11-01), Strecker et al.
patent: 4241397 (1980-12-01), Strecker et al.
patent: 4309753 (1982-01-01), Negi et al.
patent: 4384340 (1983-05-01), Tague et al.

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