> It has some unique ROMs, but it's the same encrypted CPU and the same copyright. I
> believe it's a Sega board with an additional Bally sticker applied as a distributor.
You've hit it. The "N.E." on the sticker gives it away (Bally Northeast). They named their distribution outlets by location. We had a Bally Midwest outlet here in GR MI up until 1990 or so...
"One of these days, I'm going to cut you into little pieces!"- Nick Mason, Pink Floyd