Date: Wed, 3 Feb 1999 13:16:53 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender: eliz AT is
To: Paul Derbyshire <pderbysh AT usa DOT net>
cc: djgpp AT delorie DOT com
Subject: Re: ASM - function: what should be pushed?
In-Reply-To: <3.0.6.32.19990202160710.0091b8c0@pop.netaddress.com>
Message-ID: <Pine.SUN.3.91.990203131627.29547Q-100000@is>
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Reply-To: djgpp AT delorie DOT com


On Tue, 2 Feb 1999, Paul Derbyshire wrote:

> What is ring 2 for, software drivers/servers such as a DPMI server?

Yes, it's for OS extensions.  In addition to device drivers (which
usually run part in ring 1 and part in ring 2), ring 2 might contain,
for example, various filesystem extensions.

> (CWSDPMI runs in ring 0 though doesn't it?)

Parts of CWSDPMI code run in ring 0, while others (I think most of
the code) run in ring 3.