Message-ID:	<324F2E6B.5B70@spy.isp.nsc.ru>
Date:	Sun, 29 Sep 1996 19:20:27 -0700
From:	Ryzhenkov Ilya <ilya AT spy DOT isp DOT nsc DOT ru>
Organization:	ISPh SB RAS
MIME-Version:	1.0
To:	DJGPP Mailing List <djgpp AT delorie DOT com>
Subject:	Some question on interrupts

Hello!

 I have a few questions on interraupt handling under djgpp. 
 The situation : i must write down few interrupt handlers using
 C only (no asm). All handlers are in pmode.
 It's needed to pass a kind of exam in university ;)


 1. Does interrupt wrapper saves/restores all regs ?
    Or i must do it myself in the C code ? How ?

 2. How can i chain interrupt BEFORE my handler. 
    i.e the following scheme is desired :
      interrupt occur
      wrapper starts
      wrapper call previous handler
      wrapper call my handler
      wrapper exits

 3. If the previous answer is "you can't" then how can I 
    directly call previous handler ?

							Sincerely yours, 
Ilya

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mailto://ilya AT spy DOT isp DOT nsc DOT ru                            
http://spy.isp.nsc.ru
on IRC (EFNet) as "Orangy" usually on #djgpp #novosibirsk or somewhere 
else ;)

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