Multiplex communications – Wide area network – Packet switching
Patent
1994-05-26
1995-02-21
Lall, Parshotam S.
Multiplex communications
Wide area network
Packet switching
370 852, 370 856, 3642429, 36424292, 3642415, G06F 1336, G06F 1318
Patent
active
053924363
ABSTRACT:
A method and apparatus for arbitrating between multiple processors that can be incorporated into an arbitration scheme that is designed to include only a single processor. The method includes consolidating the individual bus requests of each processor into a single bus request supplied to the single processor arbitration scheme. When control of the bus is allocated to the single processor, the multiprocessor arbitration arbitrates among the processors who requested the bus. The bus protocol used includes a least recently used method for granting bus access to the multiple processors coupled with a means for giving one processor priority over the others for access to the bus. The protocol also includes protection from interruption for the respective processor in control of the bus for a preset period of time.
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Culley Paul R.
Jansen Kenneth A.
McGraw Montgomery C.
Miller David A.
Compaq Computer Corporation
Lall Parshotam S.
Lim Krisna
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