Mail Archives: djgpp/1997/03/28/18:21:11
| From: | ykhan AT achilles DOT net (Yousuf Khan)
|
| Newsgroups: | comp.os.msdos.programmer,comp.lang.asm.x86,comp.os.msdos.djgpp,comp.unix.pc-clone.32bit
|
| Subject: | Re: FPU and protected mode
|
| Date: | Fri, 28 Mar 1997 14:38:33 GMT
|
| Organization: | Sympatico
|
| Lines: | 18
|
| Message-ID: | <5hgl51$30j$1@news1.sympatico.ca>
|
| References: | <3339DFBB DOT 3A4B AT turbotek DOT co DOT kr>
|
| NNTP-Posting-Host: | 206.172.209.187
|
| To: | djgpp AT delorie DOT com
|
| DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
|
On Thu, 27 Mar 1997 11:47:23 +0900, Heo Sung-Gwan <heo AT turbotek DOT co DOT kr>
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.
Yes, in protected mode, the FNSAVE command saves segment selector values
rather than segment register values in that structure like it does in real
mode.
Yousuf Khan
--
Yousuf J. Khan
ykhan AT achilles DOT net
Ottawa, Ont, Canada
Nation's capital
- Raw text -