I'm pretty sure that the user presumes that `__ATARI__` is defined here too. I can imagine that you argue that it doesn't makes sense as the Atari 5200 isn't a superset of an 8-bit Atari computer. In that case we maybe should start to think if the "classic" target 'atari' should be renamed to something else in order to allow `__ATARI__`, 'atari.inc' etc. to refer to all Atari machines...