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From: grim@HUEY.UDEL.EDU.UUCP
Newsgroups: mod.computers.laser-printers
Subject: Re: Problems with QMS Lasergrafix 800 and TeX
Message-ID: <8701270919.a007477@Huey.UDEL.EDU>
Date: Wed, 11-Feb-87 18:19:30 EST
Article-I.D.: Huey.8701270919.a007477
Posted: Wed Feb 11 18:19:30 1987
Date-Received: Thu, 12-Feb-87 19:30:56 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 16
Approved: laser-lovers@washington.arpa

Stephen,
	We had exactly the same problem many years ago.  I'm not sure I can
recall exactly what was wrong but there are several things to check.  The
symptoms seem to match.  I suspect that you are losing the eighth bit of
each character.  Thats where the holes in the characters come from when the
downloaded fonts are used.  (The font downloads use all eight bits for the
character bit maps.)  The other problem is probably due to incomplete
loading of fonts.  The QMS printer will substitute the first character loaded
in a font for any character that is missing in a font.  If the font download
fails, possibly also because of eight-bit problems, you will see similar
symptoms.  Check the configuration of the RS232 module and make sure it is
set for eight-bit/no parity not seven bit.  If your printer is somewhat old
there was an early ROM change that enabled the eight-bit data path.  You
might have to check with QMS about that.  Hope this helps!

					Dan