I've adapted a game directly from the executable file that runs on the BBC Micro home computer (the Beeb to us Brits) to run from ROM on the Atari 7800. Its a bit buggy but its mostly there. See :-
http://www.atariage.com/forums/topic...-port-is-here/
Its a wire frame game so that's a big to all the nay-sayers that said the 7800 couldn't do that type of game .
There are no screen shots at the moment because the game does not run correctly in the ProSystem 1.3e emulator (I haven't tried MESS). You need to run it on a real PAL or NTSC system using a CC2.