I came up with an easy hack to switch between games by pressing 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't
replace toggle switches). I found this to be a great alternative to adding
another button.



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


That's it!

If you need help, email me at:

tim@arcadecollecting.com