Slowly getting my JAMMA adapter setup in my cab which is the one from Antonio in Spain.
One thing I cant for the life of me get working is shift/combo keys, for example, on my pi setup I usually press p1 start + p1 button1 to insert a coin or hold in p1 start for a number of seconds (5) to exit a game. Anyone know how to do this, is it possible, it seems when I'm mapping the joysticks one of the options says I can assign 2 inputs, but its only for the menu option?
Guessing this would need to be in the firmware of the JAMMA interface and it’s not possible but just asking