DS:DX → modified FCB (see also FCB) the old filename ('?' wildcards OK) is in the standard location while the new filename ('?' wildcards OK, no drive) 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