Inside the Arcade1up PacMan

I received PacMan for Christmas.  I had a lot of fun, until the joystick up stopped working.

I had been thinking about moding it.  Some YouTube videos implied it could be done, that the ROMs on the board included Asteroids and Galaxian.

Sure enough, when I replaced the joystick Arcade1Up sent as replacement, the controller nest has the label saying "Galaxian, Pac Man, Space Invader" and room for a fire button P1-A.  I have not cracked the logic board connected to the display yet, but it might be tweakable if true.