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Int 21 Fn 17 - DOS 1+ - Rename File Using Fcb [D]
AH = 17h
DS:DX -> modified FCB (see also AH=0Fh)
the old filename ('?' wildcards OK) is in the standard location
while the new filename ('?' wildcards OK) is stored in the 11
bytes beginning at offset 11h
Return: AL = status
00h successfully renamed
FFh no matching files,file is read-only, or new name already exists
Notes: subdirectories may be renamed using an extended FCB with the
appropriate attribute, as may volume labels
DR-DOS checks password attached with AX=4303h before permitting rename
See Also: AH=0Fh,AH=13h,AX=4303h,AH=56h,INT 2F/AX=1111h
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