Intel Corporation (INTC) Message Board

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Technology Stocks : Intel Corporation (INTC)

INTC 36.82

+1.5%

Dec 19 9:30 AM EST

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To: Paul Engel who wrote (39925)	11/11/1997 2:17:00 AM
From: James A. Shankland	Read Replies (1) of 186894

On November 6, 1997 all Pentiums were perfectly good. And you now think that on Novemmer 10 all Pentiums are trash? This is silly enough that I'm responding against my better judgment; I doubt I'll have anything further to say on the subject. There's been a massive security hole in (probably) all Pentium chips manufactured during the last several years. Before anyone knew about this security hole, it didn't matter, because no-one knew about it. Now everyone knows about it, so now it matters. Look at it another way. The Pentium has a "halt" instruction. You can't execute it in user mode; you get a privileged instruction trap. Presumably, the designers thought it was important that you not be able to execute the "halt" instruction in user mode, or they would have allowed it. Well, now you can. Just use the magic, 4-byte sequence instead of the traditional "halt" opcode, and you've halted the processor.

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