lopan2008
New member
I recently installed a Gamebox 450-in-1 into my Jamma cabinet. I currently only have 3 buttons and would like to add 3 more so that all games are playable.
Here is my question: The manual that came with the Gamebox shows a Jamma standard diagram with 6 buttons wired to it (using slots 22-27). However, every other Jamma diagram I have seen lists slot 27 as a ground. Which is correct?
My current harness has as set of wires installed on 27 and I just want to make sure of which set up is correct before making changes.
Here is my question: The manual that came with the Gamebox shows a Jamma standard diagram with 6 buttons wired to it (using slots 22-27). However, every other Jamma diagram I have seen lists slot 27 as a ground. Which is correct?
My current harness has as set of wires installed on 27 and I just want to make sure of which set up is correct before making changes.