Input/Output Hardware Protocol?

[duncane@jumper.mcc.ac.uk (Duncan Entwisle)]

I'm thinking about trying to implement a mouse driver on the Apple //e, 
that, within my abilities, mimics the functionality of the original version.

How does the Apple //e handle cards with respect to basic (in terms of 
the hardware, as opposed to the software). When BASIC attempts to receive 
input from slot 3, what signals are generated to the card for that 
request, likewise what happens when printing to a slot (etc)

I tried finding a *apple2*hardware* group but there didn't appear to be 
anything.

Thanks.
Duncan	(sengde@eng.hud.ac.uk)