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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.
INPUTS
- 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 -
io_Data -
BIT ACTIVE FUNCTION (SERIAL DEVICE)
LSB 0 low reserved
MSB 8 high read buffer overflow
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
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
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
10 high break received (as latest input)
11 high transmit x-OFFed
12 high receive x-OFFed
13-15 reserved
BIT ACTIVE FUNCTION (PARALLEL DEVICE)
0 hi printer busy (offline)
1 hi paper out
2 hi printer selected
3-7 reserved
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)
on the A500 and A2000)
- io_Actual
-
1-parallel, 2-serial