Advance polling bus arbiter for use in multiple bus system

Details Advance polling bus arbiter for use in multiple bus system Advance polling bus arbiter for use in multiple bus system

1988-03-24

1992-01-14

Williams, Jr., Archie E.

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3642283, 3642292, 3642301, 3642401, 3642409, 364241, 3642413, 3642427, 36424292, 3642592, 364DIG1, G06F 1322, G06F 13364, G06F 13366, G06F 1516

Patent

active

050815768

ABSTRACT:
An advance polling bus arbiter includes a priority selector for selecting during a polling cycle a highest priority source system unit which is seeking access to a system bus. Bus grant logic sends the highest priority source system a bus grant signal which indicates that the selected system unit can make a transfer during the next cycle. An advance link logic unit compares a target bus address received from the selected system unit to a local bus address and simultaneously signals an intersystem bus link of an impending intersystem transfer while the source system unit is receiving its bus grant signal.

REFERENCES:
patent: 4100533 (1978-06-01), Napolitano et al.
patent: 4205373 (1980-05-01), Shah et al.
patent: 4468738 (1984-08-01), Hansen et al.
patent: 4470114 (1984-09-01), Gerhold
patent: 4586128 (1986-04-01), Dewoskin
patent: 4608700 (1986-08-01), Kirtley, Jr. et al.
patent: 4660141 (1987-04-01), Ceccon et al.

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