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Mail Archives: djgpp/2003/02/18/09:20:05

Date: Tue, 18 Feb 2003 08:44:09 +0200
From: Zaretskii Eli <ezaretski AT elta DOT co DOT il>
Subject: RE: How to open LPT1: as file?
To: "Wolfgang v. Hansen" <hansen AT fom DOT fgan DOT de>, djgpp AT delorie DOT com
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> From: Wolfgang v. Hansen [mailto:hansen AT fom DOT fgan DOT de] 
> Sent: Monday, February 17, 2003 9:43 AM
> 
> I would like to access an old dot matrix printer directly just by 
> opening the port and sending appropriate bytes to it. I tried to 
> fopen("LPT1:", "w") but that didn't succeed.

Lose the colon after "LPT1", and it will work.

Also, you want to use "wb" rather than just "w", since printers need to
accept binary non-printable characters (the commands to the printer),
not just plain text.


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