From other sources, I was told that the regular XBox was on the Intel structure, whereas the X360 was on a Macintosh-type structure, which would be more difficult.
On top of that, if anything, porting a game into an Atari 2600 would probably be your cup of tea...
On top of that, if anything, porting a game into an Atari 2600 would probably be your cup of tea...