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From: abc@brl-tgr.ARPA (Brint Cooper )
Newsgroups: net.micro.trs-80,net.micro
Subject: Re: Model I LineFeeds
Message-ID: <6060@brl-tgr.ARPA>
Date: Sun, 25-Nov-84 17:01:33 EST
Article-I.D.: brl-tgr.6060
Posted: Sun Nov 25 17:01:33 1984
Date-Received: Tue, 27-Nov-84 03:56:46 EST
References: <6045@brl-tgr.ARPA>
Distribution: net
Organization: Ballistic Research Lab
Lines: 49
Xref: godot net.micro.trs-80:176 net.micro:3098

> My TRS-80 Model I has suddenly stopped sending linefeed characters to my
> Okidata 82A printer.  That is, listing a program or outputting a file
> results in all the printed output being on one line!  This is
> irrespective of whether I'm using a TRSDOS system, CP/M, or Level II
> Basic.
> 
> The only other anomaly I've found is that when I LPRINT CHR$(N) for N
> larger than 128 (i.e., a graphics character), the character appears to
> be printed twice.
> 
> I have confirmed satisfactory printer operation from another computer.
> I have cleaned and checked all the edge connectors and have pried out
> and reinserted every socketed chip in the keyboard and the expansion
> interface.  
> 
> If there is a pattern-sensitive hardware fault, I'm baffled as to what
> could cause it and not afect other ASCII characters.  Yet, all those
> that I'M able to confirm seem to be received correctly at the printer
> except this one.
> 
> Has anyone out there experienced this problem?  Please ask your friends
> and acquaintances.  I must work from home for several weeks because of
> illness.  Without a printer, I'm quite handicapped.  HELP!
> 
> Please respond by any medium that's convenient to you.
> 
> Thanks!!
> Brint
> 

Thanks to the two or three who have already responded.  I failed to make
one thing clear:  the printer is working CORRECTLY.  With the software
that I use on the TRS-80, the printer should NOT generate its own
linefeeds.  Linefeed characters come from the computer.

The problem is, specifically, that if I SEND a linefeed to the printer,
the printer does not react to it.  In Level II, this is done by LPRINT
CHR$(10).  

The printer works correctly when connected to the Apple IIe running
Applewriter.  The Apple also provides its own LF characters, and the
printer responds correctly to them.

The puzzle appears to be:  Why do linefeed characters NOT get sent to
the printer as commanded?
Thanks, again.


Brint