GnGeo vs NeoCD-Wii

GnGeo is a free NeoGeo emulator for Linux, with the project also describing possible support for other Unix systems. It runs NeoGeo ROM sets identified by their MAME names; the listed example starts Metal Slug with `gngeo mslug`. Command-line options include home, arcade, and unibios modes, as well as fullscreen display, scaling, interpolation, raster interrupts, blitters, and visual effects. Sound and joystick support, player controls, and hotkeys are configurable. Settings can be supplied on the command line or in user and per-game configuration files. The project describes graphical frontends with features such as game previews and configuration options. GnGeo requires SDL 1.2.x, libz, and a NeoGeo BIOS; NASM 0.98 is optional for i386 assembly optimization. Games must be ZIP files, while the BIOS must not be, and the default search location is `$prefix/share/gngeo/`. The README describes a source build using `./configure`, `make`, and `make install`. The repository lists no releases, and its licensing notes forbid commercial use of GnGeo as a whole because of included code and licensing.

NeoCD-Wii is a free, open-source Nintendo Wii emulator for Neo-Geo CD games and a port of the NEO-CD REDUX GameCube emulator. Installation involves extracting the archive to an SD card or USB drive and placing game files in folders there. USB 2 support requires IOS 202. The emulator also needs a NeoGeo CD/Z BIOS named NeoCD.bin in a BIOS folder at the SD card root. Game audio belongs in each title’s MP3 directory as Trackxx.mp3 files; 44.1 or 48 kHz and 128 kbps or better are recommended. Version 0.5 lists interlaced and progressive video modes, a filter toggle, configurable Wiimote and Classic Controller buttons, saved settings, and page-based browsing. The project supports the internal SD slot and is libfat compatible. Some games may still show black screens or graphics bugs, and DVD support was untested. The repository lists GPL-3.0 licensing.