Date:	Wed, 10 Nov 1999 14:28:30 +0200 (IST)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To:	Marius Myburg <iti06469 AT mweb DOT co DOT za>
cc:	djgpp AT delorie DOT com
Subject:	Re: Modifying Interrupt Vectors, and asm problem
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On Tue, 9 Nov 1999, Marius Myburg wrote:

> Can anybode please tell me how I can modify the interrupt handling
> functions?

For the general description of hooking interrupts from DJGPP, see section 
18.9 of the DJGPP FAQ list (v2/faq211b.zip from the same place you get 
DJGPP), and the tutorials it refers you to.

>  For instance, this is a Turbo C proggy which oes just that:
> 
>  /* DOS critical error handler proggy */

DOS critical error interrupt doesn't need to be caught in a DJGPP program,
in most cases.  Most DPMI environments will automatically catch the
critical error interrupt and return a failure indication, so what your
program sees is a failed DOS function.  For more info and some caveats,
see section 22.12 of the FAQ. 

> It seems to me that DJGPP doesn't have the keyword "interrupt".

Right, it doesn't.

> Also, in the DJGPP documents, there stans that inline assembly can be used
> like for instance __asm__.  This doesn't work.  Am I missing something, or
> am I maybe missing a installation file?

Sections 17.1 and 18.13 of the DJGPP FAQ explain this in some detail.

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