Home Page Forums MAME MAME TMS-09xx/1xxx thread (was New Dumps)

Ok, it is working in MESS. The keypad row pins are the same internal output bits as the O-pins.
1 small emulation problem though, probably due to another unknown difference in the MCU: the equals sign (aka O-pin 7) is always on.

The 1976 TMS0970 version would still be interesting to acquire, to see the differences in the code.