--- Cameron Kaiser <spectre(a)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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