Mesen-X is a fork of Mesen, which is a cross-platform NES/Famicom emulator for Windows & Linux built in C++ and C#. The original Mesen project has paused development, and this fork is meant to collect patches contributed by the community.

Changes include:

• Support for newer versions of Mono, for running Mesen on Linux
• ESPM homebrew expansion audio support
• HD Pack improvements
• Replaced VRC7 synth code with Nuked-OPLL
• Debugger improvements, for Alchemy65