🚀 go-pugleaf

Does anyone know of a foolproof way to determine how a particular version
of DOS converts filenames to upper case ?

The problem arises when a file name uses characters in the range 128-255.
If you try to create a file with a name that contains a character in that
range, DOS attempts to convert it to the closest uppercase character.

For DOS 3.3 and above it is easy to determine what table DOS uses, by using
the INT 21H, AX= 6504 function.  DOS 4 and 5 also offers a function, INT 21H,
AX=6520, 6521 and AX=6522,

I guess I could use INT 2F, AX=1213 or 1211 for DOS 3.0-3.2, but (and now
comes the real problem)  Can anyone suggest a method which works with DOS 2...


-frisk