If you had to write them in machine code, couldn;t you (on your computer) write like a little conversion prog where created your own language and you convert this language into the machine code equivelants? Thats what id try to do.
Originally posted by master5001
dP munky is right on. I am only truly experienced with the Game Boy Color and Game Boy Advance (which are way different from the consoles you listed). They don't have an OS so everything you write is actually going to compile into machine code which is a double edged sword. You have complete freedom over the machine but you are burdened with not having any of the conveniences of an operating system. As far as I know video game consoles use more of a beefed up BIOS and simplified kernel system rather than an actual OS. I could be wrong, I haven't made any games or other software on PS2, GC, or XBox.