Almost forgot, I dumped the other two Select a Game Machine games, and uploaded them. I also changed the pinout file to reflect that it's used for all three HD38800 games. So only one game uses the TMS1xxx which is interesting.

The two new ones are Baseball 4 and Pinball.

I know someone wanted to make this into a 'Cart based' system on MESS but why not just emulate them as separate games that happen to share resources? It'd probably be a lot easier, seeing how different games have different CPUs.