gpSP
gpSP (game play SP) is a Game Boy Advance emulator made by coder Exophase, for use with the Sony PlayStation Portable and GP2X video game systems. The PSP version runs most commercial games at full speed, however some still suffer from minor or severe glitches, and others are very slow. The GP2X version is similar to the PSP one, but typically slower. gpSP requires a GBA BIOS file in order to operate. Due to copyright reasons this BIOS cannot be included with the emulator by Exophase, and users must find it on their own.
To date, gpSP has proven to be the most efficient, compatible, and widely used of all GBA emulators for the PSP and GP2X.
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