This message is from the T13 list server.
On Mon, 7 Oct 2002 12:07:53 -0600, Pat LaVarre wrote: >This message is from the T13 list server. >> you really have to run at the slowest cycle time >> regardless of the mode capability. Absolutely YES. [I hate to say this here but... Why do people think you can violate the setup and hold times for the address and IOR/IOW signals? Why does this keep coming up here? Is the state of EE education in this country that bad these days? Good grief, this question should never come up!] >>Anybody know if this is what Microsoft does, >or is this just a theoretical argument and a Bios >convention? This was always one of those things that would be obvious to any EE that gave it any thought! But it was added to ATA/ATAPI-x in ATA/ATAPI-5: See Note 5 in the PIO timing tables (register and data transfer). >The spec doesn't trumpet this limitation, does it? Yes it does... See above. >> master has to be online >> for all register accesses >Why the Master any more than the Slave? And I must echo this question - There is NO difference between the actions of device 0 and device 1 when it comes to how the signals are decoded and acted upon. >They both have to watch for DEV and SRST >and ExecuteDeviceDiagnostic writes. There's >nothing that the Master alone has to watch for, >is there? This is correct when talking about how devices respond to the interface signals from the host... There is nothing special that device 0 does... And there is nothing special device 1 does. Hale *** Hale Landis *** www.ata-atapi.com ***
