Originally Posted by robcfg
I found a Gakken Mini Backgammon LCD lying around at my parent's place and I thought it may be of interest.
Hey Rob! Nice pics. It looks like the MCU is NEC uPD753xx. There's lots of info in the uCOM-75x Family 4-bit CMOS Microcomputer User's Manual Volume II. I don't know if there is a test pin for electronic dumping. There is a PROM version, but I assume this one is mask ROM.