Method and system for assigning a direct memory access priority

Details Method and system for assigning a direct memory access priority Method and system for assigning a direct memory access priority

1997-04-29

1999-11-09

Sheikh, Ayaz R.

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

710 40, 710 22, 710241, G06F 1334

Patent

active

059833017

ABSTRACT:
In a PCI-interface device (20), assigning highest DMA channel (74) priority is based on the DMA channel number associated with the data transfer currently active on the physical media interface. The present invention supplies this priority information relating to the currently active data packet being transferred to the DMA arbitration logic (348) and continues to service the current DMA channel until a predetermined boundary condition exists. The method and system (300) shift DMA channel execution to this highest priority DMA channel upon determining the occurrence of the boundary condition.

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