Xref:	news2.mv.net comp.os.msdos.djgpp:8634
From:	alaric AT abwillms DOT demon DOT co DOT uk (Alaric B. Williams)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Hand chaining interrupts.
Date:	Sun, 15 Sep 1996 10:08:04 GMT
Lines:	36
Message-ID:	<842782049.7028.0@abwillms.demon.co.uk>
References:	<51argg$16jm AT news DOT goodnet DOT com>
NNTP-Posting-Host:	abwillms.demon.co.uk
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

snarfy AT goodnet DOT com wrote:

>I had a question on how to chain interrupts.  Is their anything special
>that needs to be considered?  I've written all of my interrupt code in
>asm, and I'm setting the interrupt with the raw __dpmi set interrupt calls.
>It works fine, but it doesn't chain to the old handler, and after a
>while it crashes because the old handler needs to be called.
>I've tried chaining to the old handler by just jmping to it, but that
>blows up with random error messages.

I was doing that a while ago! You see, I wrote a useful DJGPP
interrupt-chaining library. I posted the original because it was so
small - look in the archives for "libints", I guess it'll still be
there... or else wait until I FINALLY get the time to finish the next
version, including:

 - Locking malloc (lmalloc) convenience function
 - Should be more tolerant of funny DPMI providers (not that I have
many to test it with!)
 - I WILL get around to writing about PMODE/DJ and CWSDPR0!
 - Anything else I can think of in the meantime

Regards,


ABW
---

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Alaric B. Williams Internet : alaric AT abwillms DOT demon DOT co DOT uk
<A HREF="http://www.abwillms.demon.co.uk/">Hello :-)</A>

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