RE: DMA transfer over PCI

["Joseph Brcich" <jbrcich@juniper.net>]

Dinesh

It is common to do DMA burst of 32, 64, or 128 bytes.

It is best to do burst a long burst because PCI efficiency improves.
However, there is nothing that precludes doing shorter burst.
Regards
Joe Brcich

-----Original Message-----
From: Dinesh Kumar [mailto:eyesol@rediffmail.com]
Sent: Friday, October 25, 2002 12:38 AM
To: pci-sig@znyx.com
Subject: DMA transfer over PCI



Hi all,
I have a PCI add-on card attached to Intel mother board.  The on 
board memory of target card is less (640 bytes ) so that it needs 
to transfer the data very frequently to host. Is it possible to 
initiate a  burst DMA transfer for less volume of data. Is there 
any minimum data volume requirement to trigger DMA across PCI. 
Please suggest the references.

Thanks in advance
Dinesh