Date: Wed, 21 Jan 1998 15:48:13 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To: Anthony DOT Appleyard AT umist DOT ac DOT uk
cc: djgpp-workers AT delorie DOT com
Subject: Re: MCLSSAA2 : hooking interrupt 9
In-Reply-To: <741A416BE6@fs2.mt.umist.ac.uk>
Message-ID: <Pine.SUN.3.91.980121154659.27671I-100000@is>
MIME-Version: 1.0
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On Tue, 20 Jan 1998, Anthony.Appleyard wrote:

> > The problem with CLI is that some DPMI servers trap it and emulate it with
> > code that takes eons to execute. ...
> 
> Sorry, I was unaware of this. I thought that CLI was just a single quick
> instruction like POPF and RET etc.

In real mode, yes.  But in a multi-tasking environment such as Windows, 
it is unwise to let an application to disable interrupts, since this 
would prevent the OS itself from getting interrupts.