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From: milliga@cat2.cs.wisc.edu (Michael Milligan)
Newsgroups: comp.sys.amiga.hardware
Subject: Fabricating an expansion board for A500
Message-ID: <1991Mar1.210755.16835@daffy.cs.wisc.edu>
Date: 1 Mar 91 21:07:55 GMT
Sender: news@daffy.cs.wisc.edu (The News)
Organization: University of Wisconsin CS Dept
Lines: 18
Originator: milliga@cat2.cs.wisc.edu

I'm trying to come up with schematics to fabricate an expansion board to SOTS
my A500 (i.e. give it Zorro II slots just like the 2000).  I notice that the
86 pin expansion bus contains almost all the signals available from the Zorro
II slots, so it seems that it can be done without too much difficulty. . .

Strangely, I don't have access to 2000 schematics, so it makes things a little
hairy.  I do have access to someone's 3000 shcematics, which indicate to me
that it's necessary to do address and data buffering as well as add a circuit
to handle the auto-configuration.  The information I'm missing has to do with
the functions of the Fat Buster chip.  Could someone please clarify to me how
it works in relation to the Zorro slots (and only for Zorro II boards)?

Thanks in advance,
   from one frustrated individual
-- 
"I'm wasted, and I can't shutup!"     |  Michael Milligan, Professional Student
 -- saying on a chars T-shirt from    |   "Nothing I say can or will be used
    cartoon Badgers & Other Animals   |    against me in a court of law."