Hey, I've got a possibly very easy project here. See the 72-60 pin converter I picked up is incompatible with Castlevania 3 (has opening glitches then locks up before gameplay starts). And it's a known issue common to some adapter models. Any takers for looking into methods of fixing this? BTW yes, I mean NES to Famicom here. Not the more often discussed opposite.

Besides these IIRC also need modding anyway to get expansion audio from an NES powerpak? Then either way I'd want work done. So when I order the powerpak it'll be ready.

Maybe this info will help. Certainly looks like the type I have.