Method and apparatus for address mapping of a video memory using

Details Method and apparatus for address mapping of a video memory using Method and apparatus for address mapping of a video memory using

1996-11-01

1998-11-24

Chin, Wellington

Computer graphics processing and selective visual display system

Computer graphic processing system

Integrated circuit

345515, 345517, 345509, G09G 500

Patent

active

058414460

ABSTRACT:
The present invention is a graphics subsystem with a plurality of storage elements addressed by multiple bit physical addresses and a video display with a plurality of pixels addressed by multiple bit logical addresses. The graphics subsystem includes an address conversion circuitry for converting the logical addresses of the pixels to physical addresses in the video memory. When the number of bytes needed to address the plurality of pixels across the screen is not equal to an integral power of two and the logical addresses of the plurality of pixels are arranged in tiles, the address conversion circuitry converts the logical addresses of the pixels to physical addresses in the video memory by converting only portions of the total address space into tiles at any one time.

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