DREAMNEOCD vs MVSPSP

DREAMNEOCD is a Sega Dreamcast emulator for Neo Geo CD games, including selfboot games. It can also be used through DreamShell with an SD card, without CDDA. The project was ported to Dreamcast in 2004 and its maker describes it as the first working Neo Geo CD emulator for the console. It is based on Foster's NeoCD/SDL; the README credits libSDL, using its sound component. To run, it needs a 512 KB system BIOS from an original Neo Geo CD console, named neocd.bin. The README warns that a smaller BIOS will not work with version 1.0 onward, and the repository cautions that the BIOS is copyrighted and users are not entitled to a copy unless they own an original Neo Geo CD console. The program is free, but the maker prohibits selling it and limits source-code and technical-knowledge reuse to noncommercial purposes. The repository lists a GPL-2.0 license. It does not support AES or MVS emulation, related SNK arcade games, netplay, or save states.

MVSPSP is a free, self-hosted emulator for Neo-Geo MVS and AES systems, with PSP as its supported platform. The repository is public under the GPL-3.0 license. Before playing, you must create a game cache; afterward, some files used to create that cache can be removed from the ZIP archive. The project describes modified builds compatible with HBL and identifies those versions as based on emulator releases 2.2.1 and 2.3.1. Version 2.2.0 added ROM sets supported through MAME 0.119 and bootleg sets supported by MAME Plus!. Build options include save and load states, AdHoc multiplayer, a command list, Japanese UI, and 32-bit UI drawing. AdHoc requires KERNEL_MODE, and the readme recommends disabling 32-bit drawing outside NCDZPSP to reduce memory use. PSP-2000 expanded memory is available when compiled with PSP_SLIM, while a cache remains required. The listed build environment is Cygwin with PSPSDK revision 2318.