Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1998-10-05
2000-12-26
Tung, Kee M.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345511, 710 22, G09G 506
Patent
active
061667242
ABSTRACT:
A method and apparatus for sequencing palette updates in a video graphics system is accomplished by first storing a first portion of graphics data in a first position of a bus master buffer, where the first portion of the graphics data utilizes a palette. An indication of a palette update is then received, where the palette update will be used by subsequent graphics data. The updated palette is stored in a second position of the bus master buffer. A second portion of the graphics data, which utilizes the updated palette, is then stored in a third position of the bus master buffer. The data in the bus master buffer is then fetched through a direct memory access transfer initiated by the graphics processor in the system. The data is fetched in a sequential manner, which ensures that the palette update does not occur until after the graphics data utilizing the original palette has been drawn.
REFERENCES:
patent: 5065343 (1991-11-01), Inoue
patent: 5926155 (1999-07-01), Arai et al.
patent: 5949409 (1999-09-01), Tanaka et al.
Paquette Jeffrey D.
Rogers Philip J.
ATI International SRL
Tung Kee M.
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