For TurboGrafx-16 / PC Engine ROM

Protocade is a set of three very simple arcade games that was originally released in a very limited run on prototype AbCARD hardware. They are presented here, open source, for download so people can examine them and learn a little about how things are done.

Protocade consists of:
Light Cycles: A simple variant of the Light Cycles game
Asteroids, with up to 5 players!
A vibrant version of Pong