[89732] in Cypherpunks
Serious bug in Cyrix.IBM,SGS 6x86 CPU
daemon@ATHENA.MIT.EDU (=?iso-latin-de?Q?Heinz-J=FCrgen_Ke)
Tue Nov 11 07:58:01 1997
Date: Tue, 11 Nov 1997 13:25:30 +0100 (CET)
From: =?iso-latin-de?Q?Heinz-J=FCrgen_Keller?= <hjk@ddorf.rhein-ruhr.de>
To: cypherpunks@cyberpass.net
Reply-To: =?iso-latin-de?Q?Heinz-J=FCrgen_Keller?= <hjk@ddorf.rhein-ruhr.de>
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There is an article in the latest c't computer magazin about a bug
called 'Hidden CLI' in all the 6x86 CPUs including M2.
As I do not have access to such a CPU I can't verify it.
The code:
MOV BX,70h
STI
again: XCHG AX,[BX]
MOV DX,AX
JMP again
The CPU hangs ignoring all interrupts.
Anybody heard about it?
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Heinz-Juergen Keller hjk@[mail.]ddorf.rhein-ruhr.de hjkeller@gmx.[net,de]
2047bit PGP Public Key : http://www.ddorf.rhein-ruhr.de/~hjk/
MD5 Fingerprint: 4d33126fbf8c1bcd8e96ba90d99f0bdc
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