Enhanced information processing system using cache memory indica

Details Enhanced information processing system using cache memory indica Enhanced information processing system using cache memory indica

1995-02-14

1998-05-05

Chan, Eddie P.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

395842, G06F 1208, G06F 1328

Patent

active

057490937

ABSTRACT:
An information processing system includes a central processing unit, a main storage, a main storage controller for controlling the main storage, a cache memory having a content of at least one part of addresses stored in the main storage, at least one DMA controller which is capable of referring to the main storage and a DMA address translation unit for translating a logical address outputted from the DMA controller into a physical address for referring to the main storage. The DMA address translation unit has a flag representing whether or not the cache memory is referred to on DMA. The main storage controller performs either of reference to the cache memory or direct reference to the main storage based upon the flag on DMA.

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