Disc drive READY output -- any standards?

On 14/01/2011 22:28, Peter Coghlan wrote: Peter has a better memory than I; I'd forgotten about that! The TEAC data sheets used to be on TEAC's Data Storage Products Division web pages and available from their fax-back service. Trying to find the index page might be interesting, but AFAICS the docs are still there. They're also on www.devicemanuals.com. The ones I referred to are documents called: 3fd0020a.pdf -- this is mainly a description of the jumpers to select various functions on a TEAC FD235F/FD235HF 3.5" drive, and amongst other things describes the jumper settings for gating the /INDEX and /RD DATA lines. Choices are "full mask" (index valid only when coincident with pulse detection and drive-select and ready (up to speed) and seek complete); "half mask" (pulse and drive select and ready); "no mask" (pulse and drive select and motor on). However, not all FD235 drives have all the jumpers. http://www.teac.com/DSPD/pdf/3fd0020a.pdf http://www.devicemanuals.com/guide/Floppy%20Drives/TEAC/TEAC-3FD0020A-3.5-D… 5fd0010a.pdf -- a similar document but for the FD5050 combo drive (a 3.5"and 5.25" in the same half-height chassis), though it contains more information about installing the drive. http://www.teac.com/DSPD/pdf/5fd0010a.pdf 5fd0020a.pdf -- description of FD55-BR 5.25" drive; describes jumper settings but doesn't mention any gating of /INDEX. 5fd0050a.pdf -- similar document for the FD55-GFR-3/4/5/7xx drive ranges; also doesn't mention gating /INDEX. Incidentally, all describe how to set the speed select and/or density select according to pin 2 input, and where appropriate, how to make that pin an output; also how to select pin 34 as /READY or /DSK-CHG. -- Pete Peter Turnbull Network Manager University of York