Spy Hunter stack, including CSD music board, JAMMA adapter mapping controls to a six button gamepad or joystick setup. Includes all connections to JAMMA. Asking $850.
HDMI input on that...are you running the game output from your Supergun into an OSSC? I think I see the corner of one in the photos (the two select buttons).
This particular setup is a HAS connected to an OSSC Classic and into the PT6 HDMI. Another setup I use frequently is an Axunworks into an OSSC Pro into a larger HDMI monitor.
BlueRetro paired to a Nintendo Pro Controller.
I'm using a similar profile that I use for TRON on the OSSC. I can send the profile to anyone who needs it.
Interesting, I don't know if it's documented anywhere but SW1 seems to change between one minute and 1 1/2 minute timer, and SW2 seems to enable music during attract.