pcsp is the most advanced PlayStation Portable emulator, allowing you to play your PSP games on a PC.
Jpcsp has been started in July 2008 and is developed by a small but active team.
Even though Jpcsp is written in Java, it can already reach 100% PSP speed on a lot of commercial games... and the emulator performance is constantly increasing.
Jpcsp takes full advantage of dual-core processors, matching the PSP dual-core architecture. Even a quad-core can give a small performance improvement by leaving free CPU cores for the Java JIT Compiler and the graphics cache.

NVIDIA graphic cards are fully supported and Jpcsp can take advantage of powerful GPUs. Problems have been reported with ATI/AMD graphic cards: keep you Catalyst driver up-to-date as new releases might fix issues.
The project is still a beta release, but currently more than 500 games are already playable. See the list here.
Video and Atrac3 sound are supported, but only on Windows 32bit systems. Atrac3+ sound is not directly supported as there is currently no free codec available for this format. However, Atrac3+ can be decoded automatically on Windows 32bit when installing SonicStage.
Inside iso: Jpcsp emulator for Windows 32bit, Windows 64bit, Linux 32bit, Linux 64bit and Mac OSX. (made at: 2012-12-30 08:16:59)System Requirements
Minimum
Windows 32bit or 64bit / Linux 32bit or 64bit / Mac OSX
CPU: Pentium 4 and up
GPU: Any graphic card supporting OpenGL 2.0 and up
1GB RAM Recommended
Windows Vista / Windows 7 (use Jpcsp 32bit even on 64bit OS to have sound and video support)
CPU: Dual core @ 2.5 GHz
GPU: Always install the latest drivers
2GB RAM or more