jah@stc-auts.UUCP (Jeff Hanson) (09/19/89)
I have been trying to talk to a second parallel port on my
machine. I am running Interactive 2.0.1 on a Compaq 386/20.
My problem is that I want to the second parallel port as a
'raw' port in which I am only concerned with the data lines.
I would like to be able to send a bit pattern to the port
to manipulate the lines. I have written a small program to
access the port (/dev/lp2) but I keep getting a failure to
open it with errno 6 (No such device). Using sysadm to add
another printer, it tells me that I can use /dev/lp2 and
I have added a printer on that device but still I cannot
access /dev/lp2. So my questions are:
1.) How can I use the existing lp driver to access
/dev/lp2 as stated above?
2.) Do I need to change any configuration files to
make it available(i.e. sdevice or mdevice or even
/usr/spool/lp/? )?
3.) Will the device connected to the port need to have
any intelligence? Meaning are there any lines I need to
hold high and such?
Here is some info on my current state of my system.
ls -l /dev/lp*
crw-rw-rw- 1 root root 7, 1 Sep 18 17:28 /dev/lp
crw-rw-rw- 1 root root 7, 0 Sep 19 10:14 /dev/lp0
crw-rw-rw- 1 root root 7, 1 Sep 18 17:28 /dev/lp1
crw-rw-rw- 1 root root 7, 2 Sep 18 17:28 /dev/lp2
/etc/conf/sdevice.d/lp
lp Y 1 3 1 7 378 37f 0 0
/etc/conf/cf.d/mdevice
. .
. .
. .
lp Iocrwi iHc lp 0 7 1 2 -1
. .
. .
. .
Also, yes the jumpers on the board are set for it to be used as a
second parallel port.
Thanx in advance ,
Jeff Hanson
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