Sega G-80 Multigame, Version 1.0
Copyright © 1998, Clay Cowgill
Notice Regarding this Upgrade
Warning!
Although this upgrade has been tested and the
techniques used will not directly cause harm to your
Sega G-80 System, if you do something wrong, you
can very seriously damage the game electronics!
To perform this upgrade you should:
•
Be familiar with safe handling procedures for electronic components.
•
Be able to remove and replace socketed IC’s (chips) without causing damage.
•
Be able to follow directions.
Arcade games are rugged equipment, but anytime you start messing around with something (particularly
something electronic) you accept a certain amount of risk that you may break something.
This kit carries with it no guaranty of compatibility to your particular game. Although this kit has been
tested in several Sega G-80 arcade games and CPU boards, there’s a remote possibility that some of
them are different. If you carefully follow these instructions, you’ll do fine and everything will work.
I’ll try to help walk you through any problems you have, but if this looks like it’s above your confidence
level please recruit someone locally to install the kit for you!
Please read these instructions completely through before starting. If at any point your PCB looks
significantly different than what you see in here, please ask before trying something!
Credits and Thanks:
I wanted to take a little space and thank a few people that helped in various ways with this particular
project.
Dave Fish
Dave performed the original hacks on the Sega game code to allow all games
to run without their respective security chips. Without Dave’s work, the multi-
game would not be.
Al Kossow
Al has been compiling all technical knowledge of the Sega G-80 system into a
handy reference guide. Al also provided me full source code to his Macintosh
G-80 simulator program so I could use it to modify the original games as needed.
MarkJ, RayG, ZonnM, JoeW, PaulK, and the rest of the “vectorlist” people that helped bounce ideas
around and generally keep me motivated.
Introduction:
