Int 21 Fn 22  - DOS 1+ - Write Random Record To Fcb File                   [D]

   AH = 22h
   DS:DX -> opened FCB (see AH=0Fh)
   [DTA] = record to write

Return: AL = status
       00h successful
       01h disk full
       02h segment wrap in DTA

Notes: the record is written to the current file position as specified by the
     random record and record size fields of the FCB
   the file position is not updated after writing the record
   if the record is located beyond the end of the file, the file is
     extended but the intervening data remains uninitialized
   if the record only partially fills a disk sector, it is copied to a
     DOS disk buffer to be written out to disk at a later time
   not supported by MS Windows 3.0 DOSX.EXE DOS extender

See Also: AH=15h,AH=21h,AH=28h,AH=40h