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	  id RAA00403; Sat, 8 Nov 1997 17:04:04 +0100 (MEZ)
From: Robert Eckardt <roberte@MEP.Ruhr-Uni-Bochum.de>
Message-Id: <199711081604.RAA00403@ghost.mep.ruhr-uni-bochum.de>
Subject: Re: Newest Pentium bug (fatal)
In-Reply-To: <3463B053.2781E494@whistle.com> from Julian Elischer at "Nov 7, 97 04:20:35 pm"
To: julian@whistle.com (Julian Elischer)
Date: Sat, 8 Nov 1997 17:04:04 +0100 (MEZ)
Cc: roberte@MEP.Ruhr-Uni-Bochum.de, dec@phoenix.its.rpi.edu,
        hackers@FreeBSD.ORG
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It was Julian Elischer who wrote:
> Robert Eckardt wrote:
> > Just tested:
> >      CPU: Pentium (133.64-MHz 586-class CPU)
> >        Origin = "GenuineIntel"  Id = 0x52c  Stepping=12
> >        Features=0x1bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8>
> > 
> > It crashes (just lost my most recent mailbox, though I had synced!).
> > This is 2.2.2-RELEASE.

BTW, the mail folder contains now parts of two web pages in netscape,
which I had exited much earlier.

> > I also tested DOS-6.2 w/ TurboC-2.0
> > in 8088/8086-model it still reacts on Numlock and Ctrl-Alt-Del.
> > in 80186/80286-mode it crashes too.
> 
> in 8086 mode, does adding a '0xc3' on the end of the sequence make
> any difference?

Nes.

Let denote "C" compilation with TC,
           "1" a full crash (i.e. no reaction at all),
           "0" Numlock and Ctrl-Alt-Del work,
           "c" cold boot,
           "w" warm boot.
Then I found the wollowing pattern:   C 1 c 0 w 0 w... C 1 c 0 w 0 w

It seems that it depends on what is in memory.
It crashed completely when I had used TC first.


Robert

-- 
Robert Eckardt                \\ FreeBSD -- solutions for a large universe.(tm)
RobertE@MEP.Ruhr-Uni-Bochum.de \\       What do you want to boot tomorrow ?(tm)
http://WWW.MEP.Ruhr-Uni-Bochum.de/~roberte
For PGP-key finger roberte@gluon.MEP.Ruhr-Uni-Bochum.de