Method for slave DMA emulation on a computer system bus

Details Method for slave DMA emulation on a computer system bus Method for slave DMA emulation on a computer system bus

1996-05-31

1998-05-05

Teska, Kevin J.

395299, 395842, 395822, G06F 1300

Patent

active

057489459

ABSTRACT:
Method for providing slave direct memory access (DMA) support on a computer system bus that does not support slave devices, such as the personal computer interconnect or "PCI" bus. Using the method, an adapter card or microprocessor with a local DMA controller can be operated as a busmaster and simulate a system DMA controller which would normally be used during slave DMA operations. Alternatively, the method allows a local DMA controller to work with an existing system DMA controller so that application software receives the correct status when polling registers in the system DMA controller. The method allows the system DMA controller to operate as if the system DMA controller is controlling DMA transfers. In this way device contention between the system DMA controller and the local DMA controller is avoided.

REFERENCES:
patent: 5335329 (1994-08-01), Cox et al.
patent: 5450551 (1995-09-01), Amini et al.
patent: 5590377 (1996-12-01), Smith
patent: 5598576 (1997-01-01), Hsu et al.
patent: 5668957 (1997-09-01), Davis et al.
Kenneth L. Short, Microprocessors and programmed logic, second edition pp. 353-360.

Affiliated with

Also associated with

Rating

Method for slave DMA emulation on a computer system bus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for slave DMA emulation on a computer system bus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for slave DMA emulation on a computer system bus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-68716