Flexible frame buffer for raster output devices
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United States of America Patent
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Mar 29, 1994
Grant Date -
N/A
app pub date -
Jan 15, 1992
filing date -
Jan 15, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A frame buffer for constructing a full page bit map for a raster device includes a plurality of memory cells arranged in lines and columns. The bits in the memory cells have a predetermined order, and the addresses associated with the memory cells have a linear consecutive sequence when the frame buffer is scanned out according to an originally planned direction. However, when the scan out direction is perpendicular to the originally planned direction, the predetermined bit order and the linear consecutive address sequence will not hold. The frame buffer in the invention includes mechanisms to adjust the bit order and scan out addresses when the scan out direction is perpendicular to the originally planned scan direction.
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