Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!decwrl!shelby!portia!polly
From: polly@portia.Stanford.EDU (polly siegel)
Newsgroups: comp.sys.hp
Subject: Re: How to Connect an HP DraftPro Plotter (7570) to an HP9000/360
Message-ID: <5112@portia.Stanford.EDU>
Date: 6 Sep 89 03:51:55 GMT
References: <4897@portia.Stanford.EDU> <1080079@hpfcmgw.HP.COM>
Sender: polly siegel <polly@Portia.stanford.edu>
Reply-To: polly@Portia.Stanford.EDU (polly siegel)
Organization: Stanford University
Lines: 27

Thanks to all who responded - the plotter now works!  We're only
having a minor problem with handshaking but we'll figure it out.

For those who may some day want to do the same thing, the configuration
(HP9000/3xx -> DraftPro) is _not_ listed in the DraftPro manual or
in the System Admin manual.

Device special file (internal RS232):  /dev/plotter   1 0x090004

Switch settings 11-4 down; Baud rate 9600 (3 & 1 up; 2 & 0 down)
(this puts it in standalone, with parity off)

The cable must have a null modem attachment as well or it won't work.

Your program must use the appropriate ioctl calls to set up handshaking
and the correct baud rate on the tty line.  Alternatively, you can use
a sleep call to hold the line open and then use stty to set the
appropriate parameters.

Of course, for this setup it would be best to just order an HP-IB interface;
unfortunately, the sales rep did not mention this to the professor
who bought the equipment :-(

Thanks again for all the responses!  Time to go plot some chips...


Polly Siegel
Stanford University