Pointer based DMA controller

Details Pointer based DMA controller Pointer based DMA controller

1989-10-30

1991-10-08

Fleming, Michael R.

Boots, shoes, and leggings

3642384, 3642386, 3642396, 36424231, 3642395, 36423951, G11C 700, G11C 1900, G06F 700

Patent

active

050560107

ABSTRACT:
An apparatus and method for controlling direct memory access to the buffer memory located between the host system and the disk drive is disclosed. The direct memory access controller comprises a plurality of pointing means indicating buffer memory addresses accessed by the host and the disk. Based on these pointers, a port state solver and a transfer control device of the direct memory access controller can transfer byte data between the host and the buffer memory and sector data between the buffer memory and the disk device in accordance with a scheme of changing contents of the pointing means and reversing the host and the disk access activation signals with reference to relationship between associated pointers, and the size of error correction processed data. The direct memory access controller thus can efficiently transfer data without the intervention from the host with minimum hardware requirement.

REFERENCES:
patent: 4240142 (1980-12-01), Blahut et al.
patent: 4258418 (1981-03-01), Heath
patent: 4371932 (1983-02-01), Dinwiddie, Jr. et al.
patent: 4423482 (1983-12-01), Hargrove et al.
patent: 4543627 (1985-09-01), Schwab
patent: 4612636 (1986-09-01), Grover et al.
patent: 4792898 (1988-12-01), McCarthy et al.
patent: 4797851 (1989-01-01), Suzuki
patent: 4864543 (1989-09-01), Ward et al.
patent: 4949301 (1990-08-01), Joshi et al.

Affiliated with

Also associated with

Rating

Pointer based DMA controller does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pointer based DMA controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pointer based DMA controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-261888