DiscFerret: First working hardware, firmware and microcode!

On 30/10/10 17:26, Al Kossow wrote: I almost mistook that for a floppy drive until I looked it up on Bitsavers...! I can't see any real reason why SA1000 support couldn't be added to the bridge-board. Looks like the only changes required would be: - An oscillator to generate the 3.6866us +/- 0.1% timing clock (270982 to 271524Hz, nominal 271253Hz). Although I have no idea what standard crystal frequencies could be used to generate that signal. The FPGA's PLL might be persuaded to do it, though, I'll have to check. - Two jumpers to disconnect the Timing Clock from the ST412/506 Data connector when these are not in use (or maybe just a second connector?) - A 50-pin connector for the SA1000 control cable The extra cost probably isn't worth worrying about... though I might have to restrict drive selection to Drive 0 only in order to get enough I/O pins for head selection. Thanks, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/