Progress is a bit slow on my side.
I finished the MELPS 4 MCU core emulation, the only dumped game using it at the moment is Coleco Frogger.

What to do next? hmm, there's the COP400 MCU core that needs to be looked at, the PIC core too. And mayhaps the Sharp MCU core for Nintendo Game & Watch (Sarayan is very busy with other things).

Again: any dev wanna look at Milton MC6805P2?