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Ok, I meant how is using a PRD list with "PIO" different from "DMA" (especially from the software perspective) ? -----Original Message----- From: Pat LaVarre [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 10, 2002 4:38 PM To: [EMAIL PROTECTED] Subject: RE: RE: [t13] UDMA Bursts - Pause versus Termination ... Pio works better than Dma. We know this because we know people use the checkbox that Microsoft provides to turn Dma off. x4402 Pat LaVarre [EMAIL PROTECTED] http://members.aol.com/plscsi/ >>> Ooi, Thien Ern 04/10/02 04:59PM >>> This message is from the T13 list server. I don't understand. How is that different from MW-DMA and UDMA? T.E. -----Original Message----- From: Hale Landis [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 10, 2002 2:22 PM To: [EMAIL PROTECTED] Subject: RE: RE: [t13] UDMA Bursts - Pause versus Termination ... Another question: Can you give me one good reason why (5 years ago!) the host side should not be able to use a PRD list for PIO data transfers and have the host adapter preform the equivalent of the x86 REP INSx/OUTSx instructions? Given the popularity of ATA/ATAPI and all the improvements done in device designs there is no excuse for the host adapter side of the interface to be in such a sad state! ... *** Hale Landis *** www.ata-atapi.com ***
