5 Jul
2001
5 Jul
'01
1:31 p.m.
Hi,
I'm currently building a simple 6502-based computer trainer and I'd like
to implement a floppy drive on it. Steve Wozniak's Apple Disk II interface
(the FDD interface for the Apple II) is quite simple, but I need the data
that was programmed into the PROMs (P5 and P6 - they're 6309s). If I'm
interpreting the Apple Disk II schematics correctly, then the part
designations are D3 and B3 (for the P5 and P6 ROM, respectively). Ideally,
I'd also like a copy of the PROM data for the later revision of the Disk II
(P5A and P6A).
I've got some info on programming the Disk II, but without the PROM data, I
can't even get the interface running!
Thanks.
--
Phil.
http://www.philpem.f9.co.uk/
philpem(a)bigfoot.com