Works in either Pac-man or Ms. Pac-man pcbs.
You've seen other speedup chips before. This one is different, you play at normal speed until you hold down the Player 2 Start button. Then Pac or Ms. Pac goes at double speed while the ghost's speed stays the same. Hold down the Player 1 Start button and you can pass right through the ghosts. This upgrade chip works in both original Pac-Man and Ms. Pac-Man boards.
Comes with illustrated installation instructions. Programmed when ordered.