Hiya, I just wanted to report (almost) no progress with Space Race in my TTL emulation. It looks like I'm missing something serious with the 9602 monoflop emulation, or perhaps in the rest of the circuit that is supposed to create a "star field".
The output just doesn't look right, even if I didn't see a screenshot of the original yet.
I captured most of the schematics in an ExpressPCB *.sch file now and it looks like the circuit should be all right so far.