Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!hpuplca!joseph
From: joseph@hpuplca.HP.COM (	Joseph Hohl )
Newsgroups: comp.sys.hp
Subject: Re: Plotter on HP9000/835
Message-ID: <410019@hpuplca.HP.COM>
Date: 16 Nov 90 15:31:16 GMT
References: <11230@ccncsu.ColoState.EDU>
Organization: Hewlett-Packard Pleasanton Ca. Sales
Lines: 52

> Has anyone successfully set up a serial port plotter on an HP9000/835?  

Yes.
 
> What I am trying to do is set up an HP7550a plotter to run off of one of
> the mux ports (tty2p3).  I want to be able to spool to it using the lp
> spooler.

This is a good way to do it.
 
> I have tried to set it up like all the printers I have installed (i.e.
> making sure a getty is running at the right speed, using lpadmin with the
> appropriate model scripts, etc), but it is not working.  Cat'ing to the
> port hasn't worked either.  Is there some catch to the plotter that I
> have missed?

This is wrong.  Don't set up a getty.  Use SAM to add the LP device.
Specify hp7550a as a model.  The 7550 lp script checks if the device is a
tty and does the appropriate stty to set baud rate etc.  The plotter
should be configured for 9600 baud, 8bit, none parity.  If you want a
different plotter configuration, change the stty command in the
/usr/spool/lp/interface/lp_device file to match.  Also make sure that
the plotter device is owned by lp and chmod 600 (unfortunately SAM
doesn't set these if the device already is on the system).
 
> I've already tried HP Response Center and all I got was "We don't reco-
> mend using plotters as RS232 devices.  Set it up as an HP-IB device". That
> would be nice, if only I had an available HP-IB port.

Actually,  HP-IB was the only supported device in previous releases but
RS-232 is supported at 7.0. 
 
> Any help, hints, suggestions, recommendations would be greatly appreciated!
> Things like: getty settings, lp settings, type of cable used, plotter
> settings, mystical incantations used, brand of incense, etc.  Thanks.

Hopefully the above recommendations work for you.  If they don't, please
continue with the Response Center and escalate it until you get it
working.  Again, the RS-232 is supported and it does work.

 
> 							-Mike
> 
> P.S. I forgot...I'm running HP/UX 7.0
> 
> -=*=--=*=--=*=--=*=--=*=--=*=--=*=--=*=--=*=--=*=--=*=--=*=--=*=--=*=--=*=-
> Mike Conca, Computer Science Dept.   *  conca@handel.cs.colostate.edu
> Colorado State University            *  conca@129.82.102.32
>    "Everyday, as the network becomes larger, the world becomes smaller."
> ----------

Joseph