Duplicate cache tag store for computer graphics system

Details Duplicate cache tag store for computer graphics system Duplicate cache tag store for computer graphics system

1995-12-19

2000-09-26

Tung, Kee M.

Computer graphics processing and selective visual display system

Computer graphic processing system

345522, 711118, G06F 1500, G06T 100

Patent

active

061248657

ABSTRACT:
A duplicate cache tag store, accessible to a graphics processor and to devices connected to the I/O bus without creating traffic on the system bus. Any entry into, or displacement from, the CPU cache tag store is also entered into, or displaced from, the second cache tag store. The disclosure further describes a computer graphics system, having a graphics processor capable of reading from or writing to main memory, including virtual memory, without any action by the CPU; having a FIFO command buffer in main memory for temporary storage of graphics commands; having a residue buffer for the temporary storage of memory transmissions not immediately usable by the graphics processor; having a "short circuit" feature for routing graphics commands to the command processor in the minimum number of steps; having a cursor control system capable of storing cursor pattern information in, and retrieving cursor pattern information from, main memory; having a cursor bus that is reconfigurable to carry information other than cursor information; and having a frame buffer module that contains no timing or cursor control circuitry.

REFERENCES:
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patent: 4392200 (1983-07-01), Arulpragasam et al.
patent: 4858234 (1989-08-01), Hartwell et al.
patent: 5046023 (1991-09-01), Katsura
patent: 5163142 (1992-11-01), Mageau
patent: 5226146 (1993-07-01), Milia et al.

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