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From: laser-lovers@uw-beaver
Newsgroups: fa.laser-lovers
Subject: Re: LaserWriter tech question re: setsccbatch
Message-ID: <1305@uw-beaver>
Date: Mon, 10-Jun-85 15:44:29 EDT
Article-I.D.: uw-beave.1305
Posted: Mon Jun 10 15:44:29 1985
Date-Received: Wed, 12-Jun-85 07:23:58 EDT
Sender: daemon@uw-beaver
Organization: U of Washington Computer Science
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From: adobe!taft@Glacier (Ed Taft)

There appear to be at least two bugs that strike when serial channel 9
is turned off:

  (1) The start page doesn't print. This is due to a silly bug in the
PostScript program for the start page: it is trying to compute the log
of the baud rate to determine the height of the bar in the bar graph.
If the baud rate is zero, this causes a rangecheck error. This bug has
no side-effects other than failure to print the start page.

  (2) Something else goes wrong with serial communication on channel 25.
Somehow this problem is not visible when communicating from a terminal
but it fouls up spooling from TranScript, as you observed. I do not yet
understand what the problem is.

In view of these problems, I suggest that people not attempt to turn
off channel 9; instead, disconnect the AppleTalk cable while running in
serial mode. If I discover a software workaround for this bug, I will
let you know. Sorry for any inconvenience this bug may have caused.

	Ed Taft
	Adobe Systems, Inc.