From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Still problems with protected_mode_int
Date: Thu, 13 Jan 2000 21:33:04 +0200
Organization: NetVision Israel	
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To: djgpp AT delorie DOT com
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Erik Rull wrote:
>
> Then in W95 in a DOS - Box: The ISR is called and outputs the ++tics,
> and it's the same result when I use printf() or cout <<...
> When the getkey() is passed, windows returns with the following message:
> 
> Error at: 0028:C003D8B6
> V86MMGR(01)+0000006A
> IRQ:0 (no "blue screen")
> ?????
> And the system hangs up...

You cannot use cout or printf in an interrupt handler.  A program which does
that will surely hang, crash, and otherwise behave erratically.

>       cout << "Tics passed: " << ++tics << "\n";

Remove the cout thing and leave only ++tics.