Archived from groups: rec.games.video.arcade.collecting (More info?
I have since tested all the way back to the chip (5162). I compared
what is happening on the pins for ship movement. All imputs look fine.
With controllers "neutral" the line pulls up to 5 volts. When a
controller is moved, that line drop to 0. Looks like I need a Midway
5162 chip. Anyone know where I can find one?