|Arcade system(s)||Discrete Logic|
Turns out this game actually has some PROMs. They have been dumped but are not yet in MAME. The Dumping Union has one.
Licensed Taito Speed Race Twin.
gregf has schematics - his is complete.... copy on ArcArc (3 pages plus wiring diagram = 4 pages) might be missing a page.
Monitor oriented vertically.