Apple Laserwriter XON/XOFF Problem

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1 total messages Started by laser-lovers Tue, 22 Oct 1985 21:50

#73

Author: laser-lovers
Date: Tue, 22 Oct 1985 21:50

20 lines
1612 bytes

From: Allan Hetzel  <SYSAL%UKCC.BITNET@WISCVM.arpa>

We are running several Apple Laserwriters connected to an IBM mainframe
running VM.  The connection is through RSCS and an IBM 7171 protocol
converter.  Line speed is 9600.  We are experiencing the XON/XOFF problem
which is described in the known problems section of the Postscript manual.
(The Laserwriter forgets to send an XON after sending an XOFF. The printer
times out and the job is flushed.)  The problem only occurs during long
documents, 50 pages or more.  Has anyone else experienced this problem
or have a possible circumvention for it?  Our local dealer has tried to
talk to Apple but nothing has been heard from them yet.

I know that this problem will supposedly be taken care of in the next ROM
upgrade (whenever that is), but that doesn't help much now.  I've experimented
with replacing the timeout error handler in errordict with one that sends an
XON but don't have anything which works yet.

Allan Hetzel
Computing Center
University of Kentucky

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