Jeff Teunissen

DCC needs to enumerated types of at least int width, as in ```c enum foo_opt { val, val2 = 0, val3 };```

CC09 doesn't yet support ANSI/ISO-style function definitions or declarations including prototypes.

`exit()` calls the internal function `_tidyup()` to clean up, this should be equivalent to modern C's atexit list. We should be able to refactor this code so that there is...

OS-9, like Unix, makes no distinction between text and binary files; but when ANSI showed up, it specified that `fopen` needs to accept `b` even if it makes no difference,...

CC09 barfs on explicitly unsigned numbers. If you assign to an unsigned variable a hex-notated value with the highest order bit set, or a negative number, the code will indeed...