[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Serious bug in Cyrix.IBM,SGS 6x86 CPU


-----BEGIN PGP SIGNED MESSAGE-----


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?
- -------------------------------------------------------------------------------
  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
- -------------------------------------------------------------------------------

-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: latin1
Comment: Requires PGP version 2.6 or later.

iQEVAwUBNGhOxSZWWJBRAP1VAQE3bQf+KjqPXC5TkvHd21xPOHAtBqhB+28tR2gy
hUJ8XHLbtqTIx7RPi82NITuhM0x/diNzXbNsrED5bLGDZ2N/3dvdfAnlC/FetGMQ
8SBYnmbCf5PZyUWBBgC37saWhsXImRoy7S2u2PPxbUpyC/SslWqEzD2kl5EK9wEK
1TOGVdBlPid9yfLtC2/P1L5pMvKfZz2v3lnlifKJyoCFCmq3ZZzgvw9tLe/pDEeS
QHgFokrrlMf4/bNzQnemUWR6L8a6/NMFc6TYJqv7iE13GvKG4gLjLZDBsvyaXLSH
qgOta0rgPWSqPer8AetgIqvENP8iz6YP6jlQyTTm5qGyDSr5miTMHQ==
=MFmw
-----END PGP SIGNATURE-----