Categorized pixel variable buffering and processing for a graphics system
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United States of America Patent
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Jun 14, 1994
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N/A
app pub date -
Sep 11, 1992
filing date -
Sep 11, 1992
priority date (Note) -
Expired
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Abstract
A modified frame buffer and pixel variable read-modify-write method are described for a high performance computer graphics system. Pixel variables are initially classified as decision variables, intensity variables or decision/intensity variables. Only decision/intensity variables requiring a read-modify-write operation, are stored in dual interleaved DRAMs for improved bandwidth. Decision variables and intensity variables each utilize a single address/data bus per video RAM module in the frame buffer, while decision/intensity variables require dual address/data buses for accessing the interleaved memory banks. Enhanced bandwidth is obtained with a minimization of raster engine I/O requirements.
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