Pretty sure they all have the 'glop' chip... Can those be uncovered easily enough to see the die? I think I have a beater version of Zaxxon I'd be willing to sacrifice, if I still have it...
I've de-globbed several dies using heat, acid and/or a chemical called Decap.
On another front, Mattel Armor Battle has a Hitachi HD38133 28-pin DIP. Anyone have info on it? The closest I could find is HD38702/HMCS42, but the pinout is different. The PCB has jumpers for TANK/SUB, so Sub Chase probably also uses it.
