Atari800 is an emulator for the 800, 800XL, 130XE and 5200 models of the Atari personal computer.
It can be used on console, FrameBuffer or X11.
See http://atari800.sourceforge.net/ for further informations.
PSPATARI is a port on PSP of the version 2.0.2 (April 08 2006) of Atari800 from Petr Stehlik.
Dingux-Atari is a port on Dingoo/Dingux of the PSP version with some new features.
How to use it ? Everything is in the README.txt file.
Source code and binaries are available on my blog :