Here is an updated version of this file. I had to redo it all from the start, but it should not cause the emulator to hang anymore. Let me know if this works.

Donkey Kong (U) (PRG1) [!].3dn

Video

Very thanks for you work

I tested it, and it's really good. Thank you. I didn't know the NES version was such a good port. It seems barely any different than the MAME version.