This message is from the T13 list server.
On Fri, 25 Jul 2003 03:20:18 +0100, [EMAIL PROTECTED] wrote: >This message is from the T13 list server. >I'm having difficulty with IDENTIFY DEVICE Word 93. The description >associated with it explains the more immediately obvious part: namely which >device will set which bits. However, it appears IMHO to omit the more >useful information. I think the decription of word 93 is fairly clear. For example for bits 7-0 it says "Device 1 shall clear these bits to zero. Device 0 shall set these bits as follows: ..." And clause 6.16.49 (in ATA/ATAPI-7) says this again. >A brief one or two sentences would be really handy to explain the purpose >of DASP- and PDIAG- with regard to error detection etc. Its not really part of "error detection" but this ID word just reports what a device did at the last Hardware Reset. >Also - is bit 13 the only required indicator to work out whether an 80-wire >or 40-wire cable is present? If so, would it be possible to clarify that >this is what it does in the description of this word? In ATA/ATAPI-7 volume one, see the description of the signal and also see claues E.6 "Cable detection". ID word 93 bit 13 just reports the device result of the device side cable detection algorithm. It is possible for the host side to cable detect but that would be reported by the host controller in some proprietary method. Hale *** Hale Landis *** www.ata-atapi.com ***
