Concurrent general purpose and DMA processing in a graphics rend

Details Concurrent general purpose and DMA processing in a graphics rend Concurrent general purpose and DMA processing in a graphics rend

1993-09-23

1994-07-12

Shaw, Dale M.

Boots, shoes, and leggings

395275, 395375, 3642301, 3642302, 3642412, G06F 1520

Patent

active

053296150

ABSTRACT:
A graphics processor that implements general purpose graphics processing and concurrent DMA display list processing to provide rapid response to display tasks. It is implemented with multiple channels of FIFO input circuits and with task interrupt and context switching circuits. Concurrent with a host processor that constructs and downloads a display list, the graphics processor processes display list instructions as they are downloaded. This reduces latency of the displayed image and facilitates more efficient use of the graphics processor. Implementation of multi-level nested interrupts and nested subroutines by means of interrupt and subroutine circuits further enhances graphics processing capability and enhances response times. Implementation of multiple channels with context switching enhances response times by permitting a higher priority task to interrupt a lower priority task.

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