Jammafier FAQ


I’m getting “No IO, retry x”

Make sure your JVS cable is plugged into the connector marked ‘JVS’.  JVS uses the same connector as USB, which is a major source of confusion, especially on boards like the Jammafier that has both USB and JVS.

I’m getting “Unknown IO”

This is because you are (one of) the first to use the Jammafier with that particular IO board.  Please get in touch so the firmware can be updated and correctly identify it.  

What is the USB port used for?

The USB port can be used to power 5V devices from the cabinet power supply.

Can the Jammafier be used in LCD cabinets like the Taito Vewlix?

Yes – but video will have to go through an upscaler.

I want to use a video processor/up-scaler, but it only has connector X for input, what do I do?

Sorry about connector X, it can be a real PITA.  Your best bet is to find a plain connector X to VGA cable, or make your own.

If you make your own, you can find nice breakout’s on ebay by searching for “VGA MALE BREAKOUT SHELL”.

Does it support racing/gun games?

The Jammafier is digital only, i.e. buttons and sticks via the Jamma connector.  

Why is it called Jammafier?

For lack of a better name – it was originally named JVS2JAMMA, but some people confused this with an IO board for Jamma cabinets.



Last Updated on 2022-09-11 by admin