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I don't know of any host will send more data than we program; thats what the PRD/scatter-gather table are for. When we program "N" words, only this many words are transferred by the device. Now some crazy person could write a driver that prepared more data to write than they told the device about, or less data space for reading than they requested from the device, but that would be ludicrous! MKE. -----Original Message----- From: Harlan Andrews [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 29, 2002 11:01 PM To: Pat LaVarre; [EMAIL PROTECTED] Subject: Re: [t13] U-DMA Quiz Time!!! This message is from the T13 list server. Pat, It seems you missed the point of Hale's quiz. If the host attempts to send extra bytes, it is BROKEN. Do you have real examples of hosts which behave this way ? ...Harlan On 1/29/02, Pat LaVarre <[EMAIL PROTECTED]> said: >> [EMAIL PROTECTED] >> Monday - January 28, 2002 11:17 PM >> U-DMA Quiz Time!!! > >Helpful concrete examples, thank you. > >> by the time the host stops >> the host has sent 8 "extra bytes" >> ... included in the CRC >> of the last DMA burst >> but are otherwise ignored by the device. > >This is the only issue I mean to be discussing. > >As yet, Atapi UDma includes no protocol for the device to disclose its >opinion of how many bytes it should have quietly copied into the void, >rather than to storage. > Subscribe/Unsubscribe instructions can be found at www.t13.org. Subscribe/Unsubscribe instructions can be found at www.t13.org.
