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  Interrupt:   13h     Function:   19h
 
  Title:       Park Heads
 
  Description:                                                    [PS/2]
 
     Moves the read/write arm to a track that is not used for data
     storage, so that data will not be damaged when the drive is turned
     off. This function is defined for PS/2 fixed disks only.
 
     Input                           Output
 
     AH = 19h                        If function successful
     DL = Drive                        Carry flag: clear
        = 80h-FFh fixed disk
                                     If function unsuccessful
                                       Carry flag: set
                                       AH = Status
                                            See: Int 13h Function 01h
                                    -♦-