Date: Sun, 15 Jul 2001 21:34:43 +0300
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: matt AT conte DOT com
Message-Id: <9003-Sun15Jul2001213443+0300-eliz@is.elta.co.il>
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CC: djgpp AT delorie DOT com
In-reply-to: <000a01c10d47$14145340$e33e1d18@nycap.rr.com> (matt@conte.com)
Subject: Re: '9x and raise in interrupt service routines
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> From: "Matthew Conte" <matt AT conte DOT com>
> Date: Sun, 15 Jul 2001 11:59:05 -0400
> 
> > Why don't you simply chain to the previous keyboard handler?  That
> > would do what you want, and do it safely, because the previous handler
> > is the one installed by the startup code, which generates SIGINT in
> > any normal DJGPP application.
> 
> yes, that does work.  unfortunately, all keypresses get passed through
> to the default handler, and i get that annoying "keyboard buffer
> overflow" noise out of the pc-speaker.  any way to disable this, yet
> still allow CTRL-C/CTRL-BREAK to pass through?

You have all the cards: just chain to the default handler only when
Ctrl-C or Ctrl-BREAK was pressed.  You can detect that using the same
code as the default handler does (see the file src/libc/go32/exceptn.S
in the djlsr203.zip archive).  In a nutshell, it looks at the keyscan
code and the shift byte in the BIOS area.