Lookahead bus arbitration system with override of conditional ac

Details Lookahead bus arbitration system with override of conditional ac Lookahead bus arbitration system with override of conditional ac

1987-05-01

1990-12-25

Williams, Jr., Archie E.

Boots, shoes, and leggings

36493541, 36493545, 36493546, 36493701, 3649402, 3649411, 3649416, 364948, 3649502, 3649505, 3642327, 3642401, 3642408, 3642412, 364242, 3642415, 3642617, 3642714, 3642716, G06F 938, G06F 1314, G06F 13364, G06F 13366

Patent

active

049808540

ABSTRACT:
A system and method for nodes to obtain access to a bus. In this arbitration method, a central arbiter selects a particular node and issues a conditional grant. The conditional grant is transmitted before it is determined whether access to the bus will actually transfer to another node. Each node contains distributed logic that examines an extend bus cycle signal to determine whether it can become a transmitter to transfer messages on the bus. When a node becomes a transmitter, it generates an extend bus cycle signal to maintain access to the bus when executing a multi-cycle transfer, even though other nodes, perhaps with higher priorities, require access to the bus.

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