<itemize>
<item><tt/__APPLE2__/ - Target system is <tt/apple2/ or <tt/apple2enh/
<item><tt/__APPLE2ENH__/ - Target system is <tt/apple2enh/
+<item><tt/__ATARI5200__/ - Target system is <tt/atari5200/
<item><tt/__ATARI__/ - Target system is <tt/atari/ or <tt/atarixl/
<item><tt/__ATARIXL__/ - Target system is <tt/atarixl/
<item><tt/__ATMOS__/ - Target system is <tt/atmos/