Path: utzoo!attcan!uunet!decwrl!ucbvax!RICHTER.MIT.EDU!krowitz
From: krowitz@RICHTER.MIT.EDU (David Krowitz)
Newsgroups: comp.sys.apollo
Subject: Re:  postcript file to postcript printer
Message-ID: <9009191421.AA23164@richter.mit.edu>
Date: 19 Sep 90 14:21:15 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 19

The RS232 connector on a DN3500/4500 actually has 3 SIO ports wired to it.
The first port (/dev/sio1 or /dev/tty01) uses the normal pin locations 
(pins 1, 2, 3, 6, 7, 20, etc) that you would expect on the DB25 connector.
The 2nd (/dev/sio2 or /dev/tty02) and 3rd (/dev/sio3 or /dev/tty03) ports
are wired to the pins on the DB25 connector which are not normally in use.
You can get an expander block from the Instant Apollo catalog which will
give you 3 DB25 connectors wired with the pins in the regular positions.

Check that the SIO line parameters (baud rate, number of stop bits, etc.)
are set up correctly before you use "cat file.ps >/dev/tty01". You can
use "/com/tctl -line 1" to display the current SIO line settings.


 -- David Krowitz

krowitz@richter.mit.edu   (18.83.0.109)
krowitz%richter.mit.edu@eddie.mit.edu
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