Ah, I figured it out almost through trial and error. The 'D' button connects to pins 25 & c. I have been able to get into the service mode with dip switch 1, but I don't have a service button on my cab. Thanks for the suggestions!
May have the same button pinout, but the audio pins and likely the pin for game select will cause issues, unless SVC Chaos JAMMA is wired for stereo sound instead of mono.
If you stick a mono board in a cabinet wired for stereo you will fry the audio portion of that board eventually. Not right away, but it will damage the board over time. If you want to play a SvC Chaos or any JAMMA PCB in a multislot MVS cabinet, head over to JAMMABoards.com and pickup up one of their adapters. I use one in my Neo candy cab and it works flawlessly.
I had the SVC pcb board with my supergun and just plugged it in regular like how I would plug in a 1 slot and it worked with no issues.
SVC: Chaos sound question :
http://www.neo-geo.com/forums/showthread.php?95274-svc-chaos-JAMMA-PCB-sound-question
Isnt it a stereo in header for JAMMA boards that have a stereo out header?
Isnt it a stereo in header for JAMMA boards that have a stereo out header?