NAME
        Query -- query parallel port/line status

   FUNCTION
        This command return the status of the parallel port lines and
        registers.

   IO REQUEST
        io_Message      must have mn_ReplyPort initialized
        io_Device       set by opendevice
        io_Unit         set by opendevice
        io_Command      PDCMD_QUERY (09)

   RESULTS
        io_Status        BIT  ACTIVE  FUNCTION

                         0     high   printer busy toggle (offline)
                         1     high   paper out
                         2     high   printer selected on the A1000
                                      printer selected & serial "Ring
                                      Indicator" on the A500/A2000
                                      Use care when making cables.
                         3      -     read=0,write=1
                       4-7            reserved

   BUGS
        In a earlier version of this AutoDoc, BUSY and PSEL were reversed.
        The function has always been correct.