Need help to ID an unknown PCB

tomwaits

Member
Joined
Mar 7, 2009
Messages
88
Reaction score
3
Location
Lunenburg, Massachusetts
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.
 

Attachments

  • unknown.jpg
    unknown.jpg
    92.3 KB · Views: 49
Thanks for the quick reply!

Glad I didn't go any further since Capcom Classic pins 5 & 6 are video signals and not power. Now I get to build my first JAMMA adapter. :) Wonder what game it is...
 
Try dumping the ROMs and check with romident.

+1 for romident!

If that program doesn't recognize the ROM then take the checksum it outputs and search for it in Google. That'll quickly find the ROM checksum in the MAME archives.

If Google doesn't find it then you either have an unknown ROM image or a bad ROM.
 
I don't have anything to dump or burn eproms yet. I know how to use one but holding off until I can figure out the best model to handle arcade and retro console roms. Probably try to find a cheap Needham soon.

I'm going to order a 28/56 pin connector and fingerboard to build my own adapter. I know it's a bootleg board and not worth much, and might not even be a game that I like, but building an adapter will be a good learning project.

Thanks for all the help!
 
+1 for romident!

If that program doesn't recognize the ROM then take the checksum it outputs and search for it in Google. That'll quickly find the ROM checksum in the MAME archives.

Why not just use MAME to verify it in the first place?
 
Back
Top Bottom