OS-9 Level One V2.01.?? Release (??/??/2003):
- mdir and date now require a - in front of their options
OS-9 Level One V2.01.00 'Phoenix' Release (11/04/2002):
- Defs files now have properly terminated lines and 'pag' is now emitted
  as a comment.
- SYS/password now references /DD instead of /D0
- ASM now assembles 6309 op-codes