The JAMMA standard allows for 2 joysticks, and 3 action buttons. There are spare pins on the JAMMA harness which are sometimes used for buttons 4 and 5, but it’s outside of the JAMMA spec. The solution for the Capcom CPS-I system was to add an external harness that plugs into the game board itself, bypassing the JAMMA connector. The CPS-II system used an expanded connector with compatibility for 4P games a modified pinout.

This particular harness adds support for players 1 and 2 buttons 4, 5, and 6. Compatible with Sega Astro City, New Astro City, and possible Astro City 2 cabinets.

Used with MiSTercade, CPS-II games, and other assorted arcade games.