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From: slaney@uiucme.uiucme
Newsgroups: net.graphics
Subject: Re: ditroff output to Tektronix Termina
Message-ID: <12800001@uiucme>
Date: Sun, 17-Nov-85 18:52:00 EST
Article-I.D.: uiucme.12800001
Posted: Sun Nov 17 18:52:00 1985
Date-Received: Tue, 19-Nov-85 04:15:08 EST
References: <1891@orca.UUCP>
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Nf-ID: #R:orca.UUCP:1891:uiucme:12800001:000:1621
Nf-From: uiucme.uiucme!slaney    Nov 17 17:52:00 1985




I have a simple one for the 4110 instruction set.  It runs on any of the
following Tek terminals: 4105, 4107, 4109, 4112, 4113, and should run on a
4115.  By simple I mean it uses the phototypsetter output from ditroff.  Thus
all characters are spaced according to its look up table.  

Character generation is done by the terminal.  Thus special fonts are produced 
as their ascii equivallent.  To show the change in font I change the color.  
My laser/photo output doesn't do that yet.

Basically what my program 'tk' handles is:
	porpotional spacing based on ditroff defaults
	changes in character size
	font changes by switching color (naturally doesn't work to well on a
									4112)
	and pic line drawing.

I have the code written for circles and arcs but haven't had the time to 
implement it.  Spline fits for pic will wait. The only special character I have
is underline.  Haven't found a need for any others.

tk draws all pages as a retained segment (live with the error on a 4105).  This
then allows zoom and pan.  Pages can be read without zooming with the -me 
default charater size if it is known what it should say.

As it stands now it handles everything I need for my thesis.  Output is very
fast, especially if you have a 4107 or 4109 running at 38.4 kbaud.

The program 'tc' has been written for a Tek 4014.  It uses a different
instruction set.  It also requires the APL character font option.  The terminal
was then sold as a 4015.  I'm sure Mark at Tektronix can tell us more.

[ihnp4,pur-ee]!uiucdcs!uiucme!slaney

Jeff  at the University of Illinois Urbana-Champaign Mechanical Engineering