ZX-81 has updated his Atari 2600 emulator for the GP2x.

Changes:

– Add MMU hack stuff
– Add option to display frame rate
– New speed limiter function (better accuracy)
– Improve volume handler
– Improve speed (now up to 70 fps at 200 Mhz)
– Linked with my patched version of SDL
– Bug fix in .zip feature

http://zx81.zx81.free.fr/serendipity/index.php?/archives/178-guid.html