Communication multiplexer having an apparatus for establishing a

Details Communication multiplexer having an apparatus for establishing a Communication multiplexer having an apparatus for establishing a

1980-09-29

1983-09-20

Nusbaum, Mark E.

Boots, shoes, and leggings

G06F 304

Patent

active

044059817

ABSTRACT:
A data processing system includes a number of input/output devices coupled to a communication multiplexer by 1 synchronous communication line and a number of asynchronous communication lines. During the polling operation, receive communication lines have high priority and transmit communication lines have low priority. Apparatus in the polling logic gives the synchronous communication line in the receive mode first priority and the synchronous communication line in the transmit mode second priority.

REFERENCES:
patent: 3810105 (1974-05-01), England
patent: 3848233 (1974-11-01), Lotan et al.
patent: 3863226 (1975-01-01), Ryburn
patent: 4038642 (1977-07-01), Bouknecht et al.
patent: 4050097 (1977-09-01), Miu et al.
patent: 4100601 (1978-07-01), Kaufman et al.
patent: 4261033 (1981-04-01), Lemay et al.

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