Using standard drives with a Disk II card

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Using standard drives with a Disk II card

Hi all,

Does a circuit exist for attaching a standard shugart / PC drive to an Apple 2 via a Disk II card ?

I have seen pictures on the net of one Teac drive that seemed to have a converter board with a couple of LS type chips to convert the 20 pin disk II signals to the standard 34 pin shugart signals. Does a schematic of this card exist, it looked relatively simple.

here :[url]

Looking at the two interfaces, it seems that the main problem would be converting the Apple 4 wire stepping signals to the shugart step and direction signals.