Originally Posted by seanriddle
Those are both E revision dies; you think that has anything to do with it? Remember when I hooked up some TMS1100s to the Entex Baseball 3 cap and resistor to measure its frequency? Es were faster than Bs. Measuring the frequency slowed it way down, but it's possible that the ratio of B speed to E speed is correct. That would make Es 11-12% faster.

Ah! Yes, that must be why.

The game with the NEC MCU: Can you make a pinout before you send it off to kevtris? Then we can emulate it when it's dumped. It will fit right into this driver: http://git.redump.net/mame/tree/src/mess/drivers/hh_ucom4.c

Last edited by hap; 04/26/15 10:08 AM.