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Autodocs
 Devices:
 printer.device
  --background--
  CMD_FLUSH
  CMD_INVALID
  CMD_RESET
  CMD_START
  CMD_STOP
  CMD_WRITE
  CallErrHook
  PBothReady
  PQuery
  PRD_DUMPRPORT
  PRD_DUMPRPORTTAGS
  PRD_EDITPREFS
  PRD_PRTCOMMAND
  PRD_QUERY
  PRD_RAWWRITE
  PRD_READPREFS
  PRD_SETERRHOOK
  PRD_WRITEPREFS
  PRead
  PWrite
Include
GuruMeditation
Docs » Autodocs » printer.device » PRD_QUERY

NAME

	PRD_QUERY -- query printer port/line status

FUNCTION

	This command returns the status of the printer port's lines and
	registers.  Since the printer port uses either the serial or
	parallel port for i/o, the actual status returned is either the
	serial or parallel port's status.
   IO REQUEST
	io_Message	mn_ReplyPort set if quick I/O is not possible
	io_Device	preset by the call to OpenDevice
	io_Command	PRD_QUERY
	io_Data		ptr to 2 UBYTES where result will be stored.

RESULT

     io_Data          BIT  ACTIVE  FUNCTION (SERIAL DEVICE)
             LSB       0    low    reserved
                       1    low    reserved
                       2    low    reserved
                       3    low    Data Set Ready
                       4    low    Clear To Send
                       5    low    Carrier Detect
                       6    low    Ready To Send
                       7    low    Data Terminal Ready
             MSB       8    high   read buffer overflow
                       9    high   break sent (most recent output)
                      10    high   break received (as latest input)
                      11    high   transmit x-OFFed
                      12    high   receive x-OFFed
                   13-15           reserved
     io_Data          BIT  ACTIVE  FUNCTION (PARALLEL DEVICE)
                       0     hi     printer busy (offline)
                       1     hi     paper out
                       2     hi     printer selected
				     (WARNING: the bit 2 line is also connected
				      to the serial port's ring indicator pin
				      on the A500 and A2000)
                     3-7            reserved
     io_Actual       1-parallel, 2-serial

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