Emulation of independent active DMA channels with a single...

Details Emulation of independent active DMA channels with a single... Emulation of independent active DMA channels with a single...

2005-06-16

2010-02-09

Tsai, Henry W. H. (Department: 2184)

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

C710S029000, C710S038000

Reexamination Certificate

active

07660916

ABSTRACT:
The present invention utilizes a single DMA engine to process the requests of active DMA channels competing for transfer of data over a single bus. The invention employs two identical sets of DMA request registers which are connected to a processor. These register sets are connected through a switching means to the DMA engine. While a first DMA transfer represented by a first set of registers is active, the process enables preparation of the next request in a second set of registers. Upon completion of the first DMA transfer, the DMA engine is switched to commence processing of the DMA request represented by the second set of registers.

REFERENCES:
patent: 4417304 (1983-11-01), Dinwiddie, Jr.
patent: 4699060 (1987-10-01), Vuillaume et al.
patent: 5598575 (1997-01-01), Dent et al.
patent: 5642489 (1997-06-01), Bland et al.
patent: 5862408 (1999-01-01), Dey et al.
patent: 5970070 (1999-10-01), Ho et al.
patent: 6065070 (2000-05-01), Johnson
patent: 6185634 (2001-02-01), Wilcox
patent: 6643716 (2003-11-01), Hunsaker et al.
patent: 6785284 (2004-08-01), Hagen
patent: 7500028 (2009-03-01), Yamagishi

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