tomwaits
Member
I've got an unknown arcade board. There are top and bottom boards, with two ribbon cables joining the PCBs. Can't find any company or part numbers on the PCBs. It has a 28 pin edge connector, but no notch and no indication that it's JAMMA.
Here's a pic of the top board in case anyone recognizes it. Otherwise, any suggestions about how to ID would be helpful.
I checked with a meter and edge connector pins 1 & 2 are connected to ground on nearby ICs. Edge connector pins 3 & 4 are connected to pin 1 on nearby ICs. Looking JAMMAish so far, but I don't know where to try confirming -5V or +12V away from the edge connector. If I had some confidence that I'm connecting power correctly I might just apply power and see if there's audio on the correct pins? I don't have a scope, so no easy way to measure signals off the connector without plugging them into something.
Here's a pic of the top board in case anyone recognizes it. Otherwise, any suggestions about how to ID would be helpful.
I checked with a meter and edge connector pins 1 & 2 are connected to ground on nearby ICs. Edge connector pins 3 & 4 are connected to pin 1 on nearby ICs. Looking JAMMAish so far, but I don't know where to try confirming -5V or +12V away from the edge connector. If I had some confidence that I'm connecting power correctly I might just apply power and see if there's audio on the correct pins? I don't have a scope, so no easy way to measure signals off the connector without plugging them into something.
