This is Tims (http://www.arcadecollecting.com/) Multi Game Switcher that I used 
in with my Mult-Jamma Mortal Kombatcabinet.  Its a nice clean way to switch between games. 
To switch games you press the Player 1 and Player 2 start buttons at the same time, to use 
with Clay's Multi-JAMMA setup, or any other multi-game setup that uses a single switch to 
change games (this won'treplace toggle switches). This is a better way to use your existing 
buttions instead of installing another one.  It requires only a few parts and takes no time
to build.  





Pin 1   To pin 13 of 4066--o     u     o---- +5v          Pin 14

          Player 1 start---o           o

          Player 2 start---o           o

                           o    7402   o

                           o           o

                           o           o

           Ground----------o           o




Pin 1 Game switch pin 1----o     u     o---- +5v          Pin 14

      Game switch pin 2----o           o---from pin 1 of 7402

                           o           o

                           o    4066   o

                           o           o

                           o           o

           Ground----------o           o