Patent
1996-04-26
1998-11-17
Lee, Thomas C.
G06F 1320
Patent
active
058389938
ABSTRACT:
A distributed direct memory access (DMA) architecture where DMA controllers are modified to create isolated DMA channels. Each isolated channel includes its own set of uniquely addressable registers which provide functional compatibility with conventional DMA controllers. A DMA master interacts compatibly with the computer system and transparently communicates special cycles to the isolated DMA channels to cause the distributed DMA architecture to appear as the DMA controllers. The DMA master spawns special cycles to the isolated channels for sharing common write data with multiple channels and merging read data into a single DMA controller compatible register. Channel 4 cascading is also handled via tracking registers and special cycles to maintain disable and masking functionality of channel 4 as it effects channels 0-3.
REFERENCES:
patent: 5590377 (1996-12-01), Smith
patent: 5608889 (1997-03-01), Werlinger et al.
patent: 5621902 (1997-04-01), Cases et al.
patent: 5673400 (1997-09-01), Kenny
patent: 5685012 (1997-11-01), Klein
Intel.RTM. 8237A High Performance Programmable DMA Controller (8237A, 8237A-4, 8237A-5); Oct. 1987 (pp. 2-222--2-258).
PCI, Revision 2.1, A100910-940 (pp. 35-55); Jun. 1, 1995.
DMA Support on the "PCIway", Aug. 2, 1995, Version 5.4, Preliminary, pp. 2-16.
Elliott Robert C.
Riley Dwight D.
Chen Anderson I.
Compaq Computer Corporation
Lee Thomas C.
LandOfFree
System for DMA controller sharing control signals in conventiona does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for DMA controller sharing control signals in conventiona, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for DMA controller sharing control signals in conventiona will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-896032