Data communications preprocessor

Details Data communications preprocessor Data communications preprocessor

1976-01-28

1978-06-06

Nusbaum, Mark E.

Boots, shoes, and leggings

G06F 1300, G06F 300

Patent

active

040939812

ABSTRACT:
A microprogrammable data communications preprocessor exercises detailed control over a multiplicity of data lines communicating with a microprogrammable central processor while requiring central processor attention on a message basis only. Further minimization of central processor intervention is achieved through a direct memory access channel which permits data transfer directly from the preprocessor to the main memory of the central processor. The preprocessor also includes a line adapter associated with each data communications line for interface purposes, a scratch pad memory for storing data line parameters, and a microprogrammable serial byte microprocessor. Operational speed is enhanced through the inclusion of automatic operation logic which effectively by-passes the serial byte microprocessor for an automatic transfer of two bytes of data.

REFERENCES:
patent: 3453600 (1969-07-01), Stafford et al.
patent: 3564509 (1971-02-01), Perkins
patent: 3766526 (1973-10-01), Buchanan
patent: 3768076 (1973-10-01), Recoque
patent: 3825905 (1974-07-01), Allen
patent: 3828325 (1974-08-01), Stafford et al.
patent: 3842405 (1974-10-01), Key et al.
patent: 3909799 (1975-09-01), Recks et al.

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