--- Cameron Kaiser <spectre_at_stockholm.ptloma.edu> wrote:
> > > Today, I received my neat-o thing for the week, an ISA card for
> > > LocalTalk...
>
> > Which brand of card?
>
> Gen-yew-ine Apple LocalTalk "PC Card" M2313/A.
Well there you go. I have a clone card that gets a mention in an
ancient Linux document of being "under consideration". I haven't
pursued it recently.
> > But if you have a DE-9 PhoneNET adapter, that should go on your ISA
> > card just fine. Pre-DIN8 Macs had a DE9F for serial.
>
> Who would carry those?
Somebody on the list. I don't have stacks of LocalTalk/PhoneNET hardware,
but I have a few things. I think all my PhoneNET stuff is DIN-8. I
occasionally see LocalTalk stuff at the local university surplus depot,
but it's a twice-a-year thing.
> I knew I'd have to start from scratch, but this makes the project seem
> bigger than I'd like it to be :-/
It's a non-trivial, but not impossible task.
> The PC's card does indeed have a Z8530 on the board. But, bizarrely, it
> also has a Rockwell R65C02. Does this give some hope, possibly, of
> stealing
> the low-level code the on-board CPU is using to drive the Z8530 if I
> could read off the EPROMs? The EPROM socket is labelled 2764 (hopefully
> it's truthful).
That could be worth looking at. I'm guessing, then, that Apple chose
to recycle their Apple IIgs code into this card. Since I'm guessing
you don't have a schematic, it'll be fun to guess the memory map of
the 6502 from just the code. I'm working on a project to documents the
internals of a Commodore D9090 hard disk, but at least we have the
schematics (and a bunch of similar code from late-model floppies already
disassembled). Let me just say that even if you have an 8KB ROM dump,
it will take a bunch of time to turn it into something useful (having
disassembled and mostly commented the Zork engine for the C-64 - 6K)
If anyone has disassembled and commented any of the LocalTalk code from
the IIgs, that would speed up the task considerably.
-ethan
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Received on Tue Jan 08 2002 - 12:16:31 GMT