Peripheral control capable of dynamically executing command sequ

Details Peripheral control capable of dynamically executing command sequ Peripheral control capable of dynamically executing command sequ

1975-01-02

1976-07-27

Shaw, Gareth D.

Communications: electrical

Digital comparator systems

G06F 916

Patent

active

039720306

ABSTRACT:
A microprogrammed peripheral controller in response to a command executes a sequence of microprogram routines stored in a read only memory normally provided for execution of peripheral control commands, based upon the state of various status indicators included in the peripheral controller. The controller automatically executes only those microprogram routines required to accomplish a given operation in the correct sequence by employing operation phase code bits stored in a scratch pad memory. The code bits are updated after execution of each microprogram routine and upon being changed to a predetermined state signal the controller when the given operation has been completed.

REFERENCES:
patent: 3839705 (1974-10-01), Davis et al.
patent: 3889242 (1975-06-01), Malmer, Jr.
patent: 3930236 (1975-12-01), Ferguson et al.

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