Zodttd has released the worlds first PSX (Thats Playstation 1) Emulator for the GP2X, heres what the coder says:
"Very few games run, very few games are playable, and it's slow. But if you get a game working on it let me know! This is just for fun, I already heard and know what everyone thinks of the GP2X's abilities for running the PSX.
GP2SX Features:
Working Controls! ;P
It also features:
Support for multiple format ISO's (.BIN) including compressed ISO's: .Z and .ZNX These files can be compressed with PocketISO 2.0
Controls are mapped to the same place the psx controller has them.
Saving games should work but haven't been tested much."
Get the full information and download here --> http://gp2x-emulation.dcemu.co.uk/gp2psx.shtml
Many thanks to Iorgy77 for the screenshots