Date: Sun, 20 Feb 2000 16:25:06 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Thorsten Erdmann <thorsten DOT erdmann AT gmx DOT de>
cc: djgpp AT delorie DOT com
Subject: Re: How to create an interrupt service routine
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On Sun, 20 Feb 2000, Thorsten Erdmann wrote:

> does anyone have a little code sample which shows how to create an ISR which
> is able to communicate with the main program via a global variable. I need
> an ISR for the printer port (IRQ7), which reads data from a global buffer
> and writes them to the printer port.

Do you need to write a TSR with DJGPP?  That's not easy at all, since it 
requires DPMI 1.0 features.  You can only do that with CWSDPMI (and 
perhaps 386Max).  An example of how to do it is available; let me know if 
you want the URL (I don't have it handy).