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From: stever@videovax.Tek.COM (Steven E. Rice, P.E.)
Newsgroups: comp.sys.amiga
Subject: Re: Printer Problems (yes, more of them)
Message-ID: <4598@videovax.Tek.COM>
Date: Mon, 28-Sep-87 14:06:39 EDT
Article-I.D.: videovax.4598
Posted: Mon Sep 28 14:06:39 1987
Date-Received: Wed, 30-Sep-87 06:51:28 EDT
References: <14896@watmath.waterloo.edu>
Reply-To: stever@videovax.Tek.COM (Steven E. Rice, P.E.)
Organization: Tektronix Television Systems, Beaverton, Oregon
Lines: 35
Keywords: Is a chauffeur really just a souped up device driver?
Summary: Check connection of pin 14 for the cause of double line feeds

In article <14896@watmath.waterloo.edu>, Dave Mowat
(dgmowat@watmath.waterloo.edu) writes:

> Hi, my friend has an Amiga 1000 and already has a DMP 105 from Radio
> Shack and is trying to connect it on the parallel port. But there 
> exists problems.
> 
> The generic printer driver from the workbench disk (1.2) prints at the
> incredible rate of 1 character per second, gives double line feeds
> (maybe a CR and a LF ???) and moves the head two inches right, then
> back again to print a char and repeats this. What it does print is 
> correct, but slow. Every 80 (or so) chars, it puts up a requester to
> check the printer and cable. (Which we have done) READ: it don't
> really work to well.

The double line feed on each line is probably caused by holding printer
pin 14 low.  Check the function of pin 14 in the printer manual.  On
Epsons, holding that line low will will cause the printer to output a
line feed with each carriage return.  Since the Amiga outputs both a
carriage return and a line feed, this causes the double spacing.  For
my Epson, I just unsoldered the wire at the Amiga end, insulated it, and
tucked it away inside the connector shell.

Also, check to see if there is a setup switch in the printer that 
causes the head motion to the right.  This is similar to what the
DEC LA120 does when you are typing characters in on its keyboard.
It could be that it is allowing you to see what you have "typed."
Again, check the functions of the connector pins.  It could be that
a line is being held low by the cable, activating this "feature."

					Steve Rice

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