Path: utzoo!utgpu!watserv1!watdragon!tiger!mwandel
From: mwandel@tiger.waterloo.edu (Markus Wandel)
Newsgroups: comp.sys.amiga.tech
Subject: A1000 512K "piggyback RAM" info needed
Keywords: $c00000
Message-ID: <23027@watdragon.waterloo.edu>
Date: 9 Apr 90 04:44:16 GMT
Sender: daemon@watdragon.waterloo.edu
Distribution: comp
Lines: 21

I need to find the circuit which can be used with the Amazing Computing
piggyback memory hack to map the extra memory at $C00000.  The reason for
this is weird.  The piggyback memory is in my machine, as is the address
decoding hack, but I didn't put it there.  I paid someone the cost of the
chips plus a bit extra to put it in for me.  This guy (hi Mark!) had done
it so many times, he could have done it blindfolded, and he did a perfect job,
but I never got a schematic for the extra address decoding.  He didn't have it.
He had lost it long ago and was just copying the daughterboard modifications
from his own machine.

The memory has worked without a hint of trouble for two years, but just in
case I need them, I think complete schematics might be a good thing to have.
I have the Amazing Computing article, I just need the documentation for the
address decoding.  I'm sure it's floating around somewhere as an ASCII file,
could someone mail it to me?

I'd much appreciate it.

Markus Wandel
mwandel@tiger.waterloo.edu
(519) 884-9547