One of the most accurate NES/Famicom/Famicom Disk System emulators is now open source.
puNES have been closed sourced and I understand that it's a big turnoff for people but for them all I can say now is that the doors are opened and you can start contribute and improve the project right now:
https://github.com/punesemu
https://github.com/punesemu/puNES
puNES have been closed sourced and I understand that it's a big turnoff for people but for them all I can say now is that the doors are opened and you can start contribute and improve the project right now:
https://github.com/punesemu
https://github.com/punesemu/puNES