From:	"Alexei A. Frounze" <alex DOT fru AT mtu-net DOT ru>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: keyboard interrupt
Date:	Mon, 27 Mar 2000 23:55:55 +0400
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

In fact, you can't make it in plane C with DJGPP. That's because
DJGPP/GCC doesn't know the reserved word such as "interrupt" or
"__interrupt". You must make IRQ wrapper in ASM and switch there stack
as well due to flat memory model which is used by C programs. But indeed
most of things could be really made in a C function that you can call
from the IRQ wrapper. This is a way Allegro works and I also implemented
similar thing w/o Allegro myself. It's rather simple. Beleive me.

Wanna sources?

ASM file is 854 bytes long with about 30 lines. :)
Main C module with kbd functions is 6 KB.
Example program is 0.5 KB.

So it's indeed very short and simple thingy.

Alexei A. Frounze
-- 
Homepage: http://alexfru.chat.ru
Mirror:   http://members.xoom.com/alexfru

Anthony Graham wrote:
> 
> I've been experimenting with the __dmpi and _go32 things and would like to
> know if anyone would be able to tell me how to do a simple keyboard routine
> (no assembly) that increases a variable whenever a key is pressed, (I'll
> make the thing a little more useful later, I just need to know how to
> replace the default keyboard interrupt routine without it crashing), also
> putting it back to normal after Q is pressed would be really helpful too.
> 
> thanks loads.
> 
> -Anthony
> 
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