System and method for using a frame buffer in cached mode to increase bus utilization during graphics operations

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United States of America Patent

PATENT NO 5790137
SERIAL NO

08538725

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Abstract

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A system and method for increasing utilization of a system bus and frame buffer throughput in a graphic display system. The frame buffer is changed from cache inhibited mode to cached mode in order to take advantage of the burst mode of system bus in which a plurality of values are transferred to the frame buffer following one address. Data coherency is maintained between the cache and the frame buffer by invalidating a cache-line before writing to the cache-line, and by explicitly flushing the cache-line after the cache-line is filled with data.

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Patent Owner(s)

Patent OwnerAddress
APPLE INCONE APPLE PARK WAY CUPERTINO CA 95014

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Derby, Herbert G Boulder Creek, CA 9 157
Dowdy, Thomas E Sunnyvale, CA 12 183

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