PSP2600 is a port on PSP of the version v2.2 of Stella. It’s based on the work of Aenea who was the first to port Stella to PSP, and David Voswinkel who’s now in charge of the PSP port in Stella team.

Changes:

– Display and save thumbnail images for each save state
– New graphics
– Option to prevent the blue led to be displayed when
L or R are pressed

http://zx81.zx81.free.fr/serendipity/index.php?/archives/226-PSP2600-Atari-2600-emulator-for-PSP-v1.1.0-final.html