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From: laser-lovers@uw-beaver
Newsgroups: fa.laser-lovers
Subject: Re: laser printers, 8 bit serial lines, and flow control
Message-ID: <767@uw-beaver>
Date: Wed, 6-Feb-85 03:29:34 EST
Article-I.D.: uw-beave.767
Posted: Wed Feb  6 03:29:34 1985
Date-Received: Thu, 7-Feb-85 03:50:45 EST
Sender: daemon@uw-beaver
Organization: U of Washington Computer Science
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From: Brian Reid <reid@Glacier>

Bill Johnston asked about 8-bit serial lines with flow control, and
said that the Apple LaserWriter needs such a protocol. This is not
true. The Apple LaserWriter uses a 7-bit serial protocol, and in fact
the 7-bit characters that are significant to the software are only the 
printing Ascii characters and space. It does not use any binary/8-bit
characters or control characters. The data sent to it can contain
format-effector characters like newline and tab, but they are
effectively ignored.

[[Editor's note:  Fair enough.  The general problem still exists,
however, so if anyone knows...			--Rick]]