DMA access arbitration device in which CPU can arbitrate on behalf of attachment having no arbiter
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United States of America Patent
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-
Aug 31, 1993
Issued Date -
N/A
app pub date -
Jul 10, 1992
filing date -
Mar 27, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a computer system having both peripherals having their own DMA channel arbiter and peripherals having no arbiter, a separate arbitration unit, controlled directly by the CPU, is provided to arbitrate on behalf of peripherals having no arbiter. The CPU can thus freely assign different arbitration levels to such peripherals, and can instruct the arbitration unit to simultaneously arbitrate on different arbitration levels or for two or more DMA channels.
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