kevtris, yeah I noticed that the disasm was from a 2KB file, and then converted that one to a rom file wink
Could you measure the MCU OSCs now that the games are working again?

OG: it doesn't match any HMCS40 pinout. Maybe a HMCS400 one, or did Hitachi make more 4-bit MCUs? (I only know the ones from the 1980s)