INT 2F U - DOS 3+ internal - NORMALIZE ASCIZ FILENAME
AX = 1211h
DS:SI -> ASCIZ filename to normalize
ES:DI -> buffer for normalized filename
Return: destination buffer filled with uppercase filename, with slashes turned
to backslashes
SeeAlso: AX=1221h

See also: 2F121E

2F1211 - DOS 3+ internal - NORMALIZE ASCIZ FILENAME