> You are right. I tried cocktail mode and both controllers worked independently. After
> some more digging online, it looks like games like ms-pacman, pacman, etc., that only
> had one joystick, only support one gamepad in upright mode.
correct, if you think about it, that's entirely logical :-) Without hacking into the game code / memory of the machine, MAME has no idea of which player is playing, so can only do what the original machine did which is to support one stick.