Nothing fancy on the cab itself - it´s still original.
The Ms. Pac pcb has lost it´s daughter card, and the Z80 has moved back into it´s original socket.
The two ROM´s is also gone, instead it look something like this:
The game still runs the original hardware (Pac Man pcb) and you simply chose which game of the 6 you want to play,
hit the P1 button, and the game code is run, and you coin up and play
