This emulator fully emulates the Sony Playstation. Compatibility is fairly high, most games I've tried work well.
An R3000 debugger is contained which may be of interest to people working on translations.
Note: you will need a PS1 BIOS image (not supplied) - it should be called SCPH1001.bin and placed in the bios folder of the emulator.
If you get an error message saying d3dx9_26.dll is missing you can try downloading it from here
A relatively up to date compatibility list is maintained by smegforbrain. To contribute please post on the compatibility section of the forum