INT 21,17 - Rename a File Using FCB

AH = 17h

DS:DX = pointer to a modified ~FCB~ of the format:

Offset Description

00 drive designator

01 original file name

09 original file extension

11 new file name

19 new extension

on return:

AL = 00 if file renamed

= FF if file not renamed

- allows renaming of files with normal attributes

- "?" wildcard supported after DOS 2.1, "*" supported by

DOS 3.x+