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On Wed, 10 Apr 2002 17:19:33 -0700, Ooi, Thien Ern wrote: >This message is from the T13 list server. >Ok, I meant how is using a PRD list with "PIO" different from "DMA" >(especially from the software perspective) ? Because using x86 instruction cycles (the REP INSx/OUTSx instructions) is a terrible way to do high performance I/O. There is no excuse why ATA host controllers should force host software to use this I/O method from 1984 on today's systems. What crap this is! *** Hale Landis *** www.ata-atapi.com ***
