apple disk specs, hard and soft

[biomorph@athena.mit.edu (Bayard Wenzel)]

Ok. So i was wondering if someone could tell me about the interface 
with the drives on the apple2. like, which i/o addresses do what, and
what exactly they signify. a pointer to some kind of on-line documentation
would be most ideal, but even the sparcest summary of the card interface
would be nice.

I could also do with some understanding of the plug to external drives,
even just a list of what each pin corresponds to (power, gnd, clock, ack,
req, blah, blah, blah).

thanks,
bayard wenzel
biomorph@athena.mit.edu