Graphics controller including a sub-memory

Details Graphics controller including a sub-memory Graphics controller including a sub-memory

1996-04-22

1998-10-20

Kim, Matthew M.

Computer graphics processing and selective visual display system

Computer graphic processing system

345114, 345186, 345153, G06F 1500, G06T 100

Patent

active

058253718

ABSTRACT:
The content of a color designating register 3 that designates any color is compared with data preliminarily written to a main VRAM 4. The compared resultant data is stored in a sub-memory 2. In the case that display data is read, when data stored in the sub-memory 2 represents "match," color data stored in a palette 8 is then stored in a CRT-FIFO 5 through a switching portion 10, and the read operation to the main VRAM 4 for relevant pixel data is stopped. When data stored in the sub-memory 2 represents "miss-match," color data stored in the VRAM is then stored in a CRT-FIFO 5 through a switching portion 10.

REFERENCES:
patent: 5050102 (1991-09-01), Sun et al.
patent: 5440682 (1995-08-01), Deering
patent: 5526025 (1996-06-01), Selwan et al.
patent: 5598525 (1997-01-01), Nally et al.
patent: 5694585 (1997-12-01), Dwin et al.

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