Well, this is the oddest thing I have ever seen in my life...
It's a PC Engine arcade board made in Spain. It has a standard JAMMA connector, it is a quite big board which has an original Coregraphx board in one corner, and four cartridge connectors which are cardboard boxes with enormous black pot chips inside.
Here are some photos:
Well that is the actual board. At the top is the Coregraphx board, and at the bottom the cart slots, and all the other stuff just look like glue logic chips and EPROMs... :shrug:
Closeup of the Coregraphx board with all the ports desoldered.
Here's the... "cartridge" itself. It's quite odd how, instead of 99% of cartridge, instead of having the pins in one face making it all stright, it has the pins at the bottom. There's the info of the manufacturer too (don't try calling or something; it possibly doesn't exist anymore).
And well, you could think, that sure is a chinese clone sold by an arcade supplier in Spain...
Made in a rented jail cell? NO! Made in Spain. C:
Good: it's odd. And PC Engine. And very, VERY OBSCURE.
Bad: it doesn't work with actual Hu Cards so it's quite useless.
Ugly: you will never find one in your life. I doubt that they did manufacture more units that the ones you can count with your fingers. And in Spain there is a law that says, when the machine license expires, it has to be destroyed. So good luck.
Source: pocket_lucho in ElOtroLado.NET.