This message is from the T13 list server.
On Sat, 9 Feb 2002 21:53:32 +0200, Dimiter Popoff wrote: >This message is from the T13 list server. >And then ATAPI devices can just have CD and IO copied (by smarter >host adapters) into those bits... not a bad idea. >More applicable if the XY reinvention of CD/IO follows the original >a bit closer, of course. No! This has NOTHING to do with the ATAPI IO and CD bits! NOTHING! Besides, IO and CD don't have any meaning during a DMA data transfer because a properly implement device will have BSY=1 status during a DMA data transfer. My XY bit proposal is to solve a somewhat serious problem that host software has when trying to determine how much of the host I/O buffer was used during a DMA transfer. My proposal applies to all DMA transfers, any time a PRD list is used, and it doesn't matter if the device is ATA or ATAPI. *** Hale Landis *** www.ata-atapi.com *** Subscribe/Unsubscribe instructions can be found at www.t13.org.
