I don't know how similar the amiga drive is, but my suspicion is that
the basics are all the same, with differences in track and sector
density.

So this should be a gold-mine:
http://www.techtravels.org/amiga/amigablog/

And here is an SD/MMC floppy drive emulator:
http://www.sensi.org/~tnt23/megadrive/index.html

It's for the amiga, though, so you'll have to work through it to see
how similar it really is.

-Adam

On 6/15/07, M. Adam Davis <stienman@gmail.com> wrote:
> I'd start with this:
>
> http://www.interfacebus.com/PC_Floppy_Drive_PinOut.html
>
> Assuming all the signals are digital, then it's a pretty
> straightforward low-level interface.
> There are a few tutorials on how to control the motor and stepper of
> the drive.  Beyond that, hook up a drive and play around.  The motor
> signals for drive A and B can be found here:
> http://www.nullmodem.com/Floppy.htm
>
> -Adam
>
> On 6/15/07, Anand Gadiyar <gadiyar@gmail.com> wrote:
> > >
> > > Good luck in your search!  The floppy drive interface is very low
> > > level.  I imagine a floppy drive could be emulated using a PIC,
> > > though, but good luck digging that up and getting it to work.
> > >
> > > If you do, you'll have a nice niche product that I expect would sell
> > > pretty well for several years, if not decades.
> >
> >    This looks like an interesting thing to try out. Any ideas how one
> > can go about it? Where do you get the specs for a floppy disc
> > controller? What possible commands the PC sends to the drive and what
> > possible responses it needs to give back, and so on.
> >
> > -Anand
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