Date:	Thu, 27 Mar 1997 13:52:49 +0300 (IDT)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To:	Heo Sung-Gwan <heo AT turbotek DOT co DOT kr>
cc:	djgpp AT delorie DOT com
Subject:	Re: FPU and protected mode
In-Reply-To:	<3339DFBB.3A4B@turbotek.co.kr>
Message-ID:	<Pine.SUN.3.91.970327135039.9299Y-100000@is>
MIME-Version:	1.0

On Thu, 27 Mar 1997, Heo Sung-Gwan wrote:

> I am coding FPU context switch with Pentium processor using fnsave and
> frstor FPU instructions. And I found these FPU instructions behaves
> differently between real mode and protected mode.

The layout of the buffer saved and restored by FNSAVE/FRSTOR instructions
is indeed different in real and protected modes.  You should look up its
description in any of the available manuals on protected-mode programming
in assembly.  A reference on Intel instructions should also describe this. 

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