DOS Fn 13H: Delete File via FCB

                                                         Compatibility: 1.0+ 
 Expects: AH    13H
          DS:DX address of an unopened FCB (filespec may contain '?'s)
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 Returns: AL    0    if the file was deleted successfully
                0ffH if file not found or access denied
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    Info: All matching filespecs in the current default directory on the
          drive specified in the FCB are deleted.

          If no matching filespecs are found, or if access is denied (as
          when attempting to delete a file with a file attribute of
          Read-Only), AL returns 0ffH.

See Also: Fn 41h (delete file)
          Directory and File Functions
          DOS Functions
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