Method and apparatus for accelerating the rendering of images

Details Method and apparatus for accelerating the rendering of images Method and apparatus for accelerating the rendering of images

1998-04-17

2000-07-18

Shin, Christopher B.

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

710 33, 710 52, G06F 1300

Patent

active

060921242

ABSTRACT:
A direct memory access (DMA) circuit which is physically positioned with an input/output device, the DMA circuit storing a first reference value pointing to a data structure which describes a buffer portion of system memory in which data is stored for transfer to the I/O device, a value determining a position within the buffer portion of system memory beginning at which a next sequence of data is to be placed, and a value determining a position within the buffer portion of system memory from which a next sequences of data is to be copied to the I/O device, the DMA circuit including circuitry for reading data from the buffer portion of system memory beginning at the position from which a next sequences of data is to be copied and for writing the data read to the I/O device.

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