Geolith vs NCDZPSP

Geolith is a free emulator for the Neo Geo AES, MVS, CD, and CDZ. It supports commercially released AES, MVS, and CD games, and runs on Linux, macOS, BSD, and Windows. Cartridge systems accept TerraOnion .NEO files; CD systems use .bin/.cue and can optionally use .chd images. BIOS files from a recent MAME set are required, with the needed archives varying by system. Geolith synchronizes its CPUs with the video and sound systems, though video event timing is best effort and cycle-accurate rendering remains a longer-term goal. Settings include system and BIOS mode, region, free play, memory card options, palette, and aspect ratio. Supported inputs range from Neo Geo joysticks to a Mahjong Controller, four-player extension board, V-Liner, and the Irritating Maze trackball. The project was written for The Jolly Good API and can be used in multi-emulator frameworks or standalone binaries. It does not support dedicated JAMMA PCB systems or PAL mode; an early Stakes Winner prototype is also unsupported because required data is missing.

NCDZPSP is a Neo-Geo emulator within NJEmu, a collection covering CPS1, CPS2 and NEOGEO (CD) emulators for PSP. It is listed for PSP, PlayStation Vita and PPSSPP, with Neo Geo CD support and save states. The latest listed release is version 2.3.5, published May 11, 2018, with an NCDZPSP2.3.5.zip download. That release records a game-list limit of 512, cheat support, multilingual support and command hotkeys. Its ROM set uses MAME 0.152, with some hack and bootleg sets added. The README maps O to OK, X to Cancel and SELECT+START to the emulator menu. The 2.3.x series is described as experimental; its notes warn that added features reduce free memory, some games may require cache files and some may fail to start. AdHoc online play does not apply to NCDZPSP, so netplay is unavailable. The project is GPL-3.0 licensed, and source builds require PSPSDK 0.11.2, MSYS and Makefile edits.