FCEUX vs Nestopia Undead Edition

FCEUX is a free, open-source emulator for NES, Famicom, Famicom Disk System, and Dendy systems. It supports NTSC, PAL, and NTSC-PAL Hybrid video modes and offers tools for casual play as well as advanced work such as debugging, ROM hacking, map making, tool-assisted movies, and Lua scripting. The project maintains Win32 and Qt/SDL ports. The Qt/SDL version runs across Windows and UNIX-like systems, including Linux, Solaris, BSD, and OSX. Its tools include debug utilities, movie recording, a TAS Editor, sprite viewer, NES Palette Editor, AVI RIFF Tree viewer, and frame timing tool. Network play in both Win32 and SDL ports is not functional, and the project says it has no plans to fix it. Building Qt/SDL requires Qt5, SDL2, minizip, zlib, and OpenGL; CMake is needed to build from source. FFmpeg libraries are optional for AVI recording, and libx264 is optional for H.264 AVI encoding. The project dates to 2006, and its home page lists version 2.6.6, released on 26 August 2023, as the latest release.

Nestopia Undead Edition is a free graphical interface project for the Nestopia emulator, aiming to provide a standalone GUI. The maker’s site lists version 1.99.0 as released, and the project identifies its license as GPL-2.0. The product platform listing names Linux, macOS and Windows, while the supported-platform listing names Windows. The repository includes source required to build the legacy Win32 release; for future GUI work, it points to a cross-platform build under the Jolly Good Emulation project. Nestopia UE supports save states, rewind, netplay, shader support and cheats. For a Nestopia-format cheat database, the project points users to Mighty Mo’s Cheat Code Pack. The project no longer maintains the emulator core and directs core emulation issues upstream. Contributions are reviewed when they relate to standalone GUI builds. Code outside a tagged release is described as volatile, so development work not included in a tagged release may change. The listed plan is free, with no stated price or usage limits.