Mesen is a cross-platform libretro core for NES/Famicom built in C++. Older standalone versions are available elsewhere.

Website (https://www.mesen.ca)
Documentation

Development builds of the latest commit are available from the libretro buildbot.

Warning: These are development builds and may be unstable.

Things that may or may not be added in the future, in no particular order:

• Support for more UNIF boards and more NES/Famicom input devices

See COMPILING.md

Mesen is available under the GPL V3 license. Full text here: http://www.gnu.org/licenses/gpl-3.0.en.html

Copyright (C) 2014-2019 M. Bibaud

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.