Mark Hanchey wrote:
> Is anyone aware of a circuit that would allow a SD memory card to be
> attached to a pc
> in place of a floppy drive so that the host pc thinks its accessing a
> floppy.

I did something similar for a customer a few years ago.  The board connected
to the floppy cable and looked like a floppy to the system.  A PIC
communicated on the floppy bus and read and wrote to a on board flash that
simulated the bits stored on the floppy.  This particular unit was just a
demonstrator of the capability.  It had a serial interface so that the
simulated floppy data image could be saved and restored externally.

Note that the low level pulses transmitted over the floppy cable are a long
way from a file system.  My device only emulated a raw floppy.  It's
obviously doable to translate between this and files, but not trivial.


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