Process and apparatus employing microprogrammed control commands

Details Process and apparatus employing microprogrammed control commands Process and apparatus employing microprogrammed control commands

1977-01-19

1982-04-13

Thomas, James D.

Boots, shoes, and leggings

G06F 946, G06F 922

Patent

active

043251196

ABSTRACT:
Firmware generated commands provided by a control store in a microprogrammed communications processor which is coupled in a system including a main memory and a central processing unit control the processing of instructions from the central processing unit, interrupts from the communications channels and servicing of such channels if a channel status change is detected. The firmware also controls the operation of the servicing of such channels by providing a control mechanism by which data is read from or written into the main memory. Further, interrupts which are not handled immediately are handled in a deferred interrupt arrangement.

REFERENCES:
patent: 3579197 (1971-05-01), Stapleford
patent: 3618039 (1971-11-01), Baltzly et al.
patent: 3902162 (1975-08-01), Parkinson et al.
patent: 3976977 (1976-08-01), Porter et al.
patent: 4006466 (1977-02-01), Patterson et al.
patent: 4060849 (1977-11-01), Bienvenu et al.
patent: 4079448 (1978-03-01), N'Guyen et al.
patent: 4104718 (1978-08-01), Poublan et al.

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