Disc drive READY output -- any standards?

On 17 Jan 2011 at 1:14, Pete Turnbull wrote: Hi Pete, My point was that using a Teac 3.5" floppy drive probably would not duplicate the behavior of the original 3" drive that Phil is trying to rebuild. I'm very familiar with the behavior of various drives, including Teac. Some late-model 5.25" drives, for example, won't come ready if a hard-sectored floppy is used. You get no index output at all. Some drives send the index pulse through even if READY hasn't been asserted by the drive. I suppose that I ought to settle this by hauling out one of my 3" drives and document the READY signal behavior. I suspect that you also don't have detailed documentation on option pads for the FD-235HF-A240 either--neither do I. While I do have some schematics from the Teac FAX-back service, at some point Teac quit honoring requests for low-level technical information on their floppies. I've had to use mostly trial and error to do things, such as find out how to make the 5.25" part of an FD505 operate in 2-speed mode (it can be done). But I'm with you in one respect--further discussion of this topic is less than satisfying. Best regards, Chuck