Here’s a low cost, DIY solution for a custom JAMMA adapter. In this kit you will receive a 56 pin female edge connector and a conversion board. You supply your own wire, or as an option some can be included in the kit.
The kit will be available in the 36 pin, 44 pin and 56 pin versions, with the difference being the edge connector that is included.
The adapter board includes a couple of solder shortcut pads for pins that are normally grounded on a JAMMA harness: SPK- and VGND.
Version 1.0: Initial Design. Obsolete now.
Version 1.1: Changed pad size. Added shortcut pads for VGND and SPK-.