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From: dall@plains.UUCP (Brian Dall)
Newsgroups: comp.lang.postscript
Subject: Re: Help: Overriding DIPS on LaserWriter IINTX
Message-ID: <5431@plains.UUCP>
Date: 8 Aug 90 03:11:06 GMT
References: <1990Aug7.225900.22721@sun.soe.clarkson.edu>
Followup-To: comp.lang.postscript
Organization: North Dakota State University, Fargo
Lines: 32

In article <1990Aug7.225900.22721@sun.soe.clarkson.edu> whiteaj@clutx.clarkson.edu (Andrew White) writes:
>I am using both a Mac and an IBM AT with my LaserWriter IINTX, and the
>only way to use both (without making the AT support LocalTalk) is to
>switch dip switch #2 back and forth, up for LocalTalk and down for RS-
>232.  The manual mentions (on page 125, I believe) that these switches
>can be set by "downloading a PostScript program".  I take that to mean
>that PostScript can set the switches.  The manual does not, however,
>mention *how* to do this.
>
>Anyone have any suggestions?

I don't have my red book handy, but this can be set using the setsccbatch
commands, if I recall correctly.  Darn, I wish I hadn't left it at work.
Setting the port is a bit messy, because it requires an exitserver and
after you set it, it "doesn't listen" to the port that was sending the
program to change the port.  Usually you need to send an EOF (ctrl-D, from
the serial port) from the new device.  It is similar to setting the speed
from 9600 to 19200 bps and back again from the serial port.  Send the 
program to change the speed, then change the speed of your comm program
and ctrl-D to end the program.  If you send anything after the line of
code that changes the speed, you get gibberish and the printer responds
with an error and "ingnoring until end of file."

Also, if you are leaving the Mac connected to the printer, you may need
to switch both dip 1 and 2.  The NTX sees the connector for appletalk
as a serial connector as well, and will lock on to it if the mac
remains connected and ignore the 25-pin RS-232 port.

Good Luck,

-Brian Dall
dall@plains.NoDak.edu