Message-Id: <3.0.6.32.19990202160710.0091b8c0@pop.netaddress.com>
X-Sender: pderbysh AT pop DOT netaddress DOT com
X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32)
Date: Tue, 02 Feb 1999 16:07:10 -0500
To: djgpp AT delorie DOT com
From: Paul Derbyshire <pderbysh AT usa DOT net>
Subject: Re: ASM - function: what should be pushed?
In-Reply-To: <199902021815.NAA00632@envy.delorie.com>
References: <3 DOT 0 DOT 6 DOT 32 DOT 19990202124127 DOT 00900c10 AT pop DOT netaddress DOT com>
 <86p4sp5i800 DOT fsf AT vesuri DOT Helsinki DOT FI>
 <3 DOT 0 DOT 6 DOT 32 DOT 19990202124127 DOT 00900c10 AT pop DOT netaddress DOT com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Reply-To: djgpp AT delorie DOT com

At 01:15 PM 2/2/99 -0500, you wrote:
>The OS normally runs in ring 0, so no matter what the IOPL is, it can
>do I/O.  Intel recommends that device drivers run in ring 1 to protect
>the OS while allowing I/O, yet protecting the drivers from
>applications, which would run in ring 2 or 3.

What is ring 2 for, software drivers/servers such as a DPMI server?
(CWSDPMI runs in ring 0 though doesn't it?)

Where in the name of small purple pixels scattered randomly across the
screen after switching to Windows and back did the term 'ring' come from
anyways?
-- 
   .*.  "Clouds are not spheres, mountains are not cones, coastlines are not
-()  <  circles, and bark is not smooth, nor does lightning travel in a
   `*'  straight line."    -------------------------------------------------
        -- B. Mandelbrot  |http://surf.to/pgd.net
_____________________ ____|________     Paul Derbyshire     pderbysh AT usa DOT net
Programmer & Humanist|ICQ: 10423848|