Method and apparatus of bus arbitration using comparison of comp

Details Method and apparatus of bus arbitration using comparison of comp Method and apparatus of bus arbitration using comparison of comp

1980-02-25

1982-03-16

Zache, Raulfe B.

Boots, shoes, and leggings

3408255, G06F 946, H04Q 300

Patent

active

043204678

ABSTRACT:
A bus arbitration method and apparatus for determining which of a plurality of devices desiring access to a common bus will gain access to the bus when it becomes available. Using the change of state of a common BUSY line to synchronize the simultaneous initiation of the arbitration process in each competing device, each device outputs a unique signal to a common arbitration line or lines. Each device monitors the composite signal on the arbitration line or lines and determines its priority relative to other devices. The device with the highest priority gains access to the bus and outputs a signal to the BUSY line until the bus is available for another arbitration.

REFERENCES:
patent: 3447135 (1969-05-01), Calta
patent: 3796992 (1974-03-01), Nakamura et al.
patent: 3815099 (1974-06-01), Cohen
patent: 3909790 (1975-09-01), Shapiro
patent: 3997896 (1976-12-01), Cassarino, Jr. et al.
patent: 4017841 (1977-04-01), Jensen
patent: 4096571 (1978-06-01), Vander Mey

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