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I/O cache controller containing a buffer memory partitioned into lines accessible by corresponding I/O devices and a directory to track the lines
I/O cache controller containing a buffer memory partitioned into lines accessible by corresponding I/O devices and a directory to track the lines
A cache for use with input/output devices attached to an input/output bus. Requests for access to system memory by an input/output device pass through the cache. Access authority is checked to determine whether an input/output device is authorized to access that particular page. If it is not, access is denied. Each input/output device has access to a portion of the cache, so that activity by one device will not interfere with activity by another.
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