Open Source Project - Multi 4 Player Adapter - Coming Soon

xodaraP

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Hi,
I am currently working on a 4 player adapter to allow connection of CPS2, CPS1 and CPS1.5, Konami, Taito and Midway 4 player boards breaking out into 2 DB15 connectors to allow Neo Geo compatible controllers to be used. Alternatively the board will also work as an adapter between these boards

I have included an external power connection using a JST VH 2 pin connector (same as on a Neo Geo 4/6 slot board) to allow for powered controllers to be used for boards that do not pass through power from the harness (CPS2 has 12V connected)

I have ordered prototype boards but these have not yet arrived, but I do have a 3D render. Please ignore the incorrect connectors, they are just the renders included in KICAD

Screenshot 2026-06-12 173328.png

Once the prototypes have arrived and I can test and confirm everything is working as expected, this will be released as a completely open source design for people to be able to create their own or modify as they need for their own setups
 
Looks great, but because you're from Australia, I think you put the controllers on upside down!

(I think they would be better on the bottom)
 
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