Unexpected, but if it's dumpable, no problem smile
The COP400 emu in MESS looks good, I just need to make a handheld driver for it (and that space invaders game too).

I connected the cap and resistors from BB3 to 4 other TMS1100s - two were B-revision dies and two were E-revision. Interestingly, the Es are faster than the Bs- B amateur = 169K, B pro = 218K, E amateur = 188K, E pro = 244K. The original chip was a B, so I guess 169K/218K is the way to go.
Thanks! It's probably times-2? eg. (169K*2)hz: approx 340khz.