Method and apparatus for accessing memories having a...

Details Method and apparatus for accessing memories having a... Method and apparatus for accessing memories having a...

2006-05-16

2006-05-16

Shin, Christopher B. (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

C710S035000, C710S052000, C710S305000

Reexamination Certificate

active

07047328

ABSTRACT:
The invention relates to an apparatus and a method for accessing memories having a time-variant response over a PCI bus by using two-stage DMA transfers. The invention provides a method for executing a read request over a PCI bus by transferring the requested data from a main memory of a PCI card to a device located on the PCI bus, comprising the steps of obtaining an access request from a read access queue, transferring, by a first DMA transfer, the requested data from the main memory to a buffer memory on the PCI card, and transferring, by a second DMA transfer, the data from the buffer memory to the device.

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patent: 6253250 (2001-06-01), Evans et al.
patent: 6389527 (2002-05-01), Raam et al.
patent: 6453368 (2002-09-01), Yamamoto

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