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Path: utzoo!watmath!clyde!akgua!psuvax!mancuso
From: mancuso@psuvax.UUCP (Pat Mancuso)
Newsgroups: net.micro,net.games.video
Subject: Arcade game control program query
Message-ID: <441@psuvax.UUCP>
Date: Fri, 3-Feb-84 12:54:37 EST
Article-I.D.: psuvax.441
Posted: Fri Feb  3 12:54:37 1984
Date-Received: Wed, 8-Feb-84 04:41:09 EST
Organization: Pennsylvania State Univ.
Lines: 17

I recently bought a pinball machine (Bally's Space Invaders) and was suprised
to find that the thing is controlled by a 6800 MPU chip.  Being the glutton
for punishment that I am, I am considering rewriting the ROM program.  The 
only problem is that disassembled code is pretty tough to crack sometimes, 
so I really don't know where to start.  I have a SWTPC 6800 system, and I
[kknow 6800 machine code, so that's not a problem.  Has anyone tried anything
like this before?  I have seen video games with 'aftermarket' ROM chips in
them to make them harder (Galza, Pac-Man (ick)) so someone out there has done
it.  How? 

---
Overall there is a smell of fried onions.  (fnord)

                                 :+: Pat Mancuso
                                 :+: Penn State University
                        Usenet:  :+: allegra!psuvax!mancuso
                        Bitnet:  :+: mancuso@psuvax1