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Technology Stocks : Intel Corporation (INTC)

INTC 45.51

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Jan 9 9:30 AM EST

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To: Tony Viola who wrote (39989)	11/11/1997 12:54:00 PM
From: Petz	Read Replies (1) of 186894

Tony, RE: Bugs like this are found in mission critical system 390 and other large scale computers to which companies like Ford, Daimler Benz, AT&T, EDS, and other multi-billion dollar companies commit their entire operations They are NOT. The IBM 360 series and its followons had a much more regular instruction set where the opcode is completely defined in the first byte. This is totally unlike the x86 architecture which has grown out of control with bits all over the place defining new instructions for each new generation. The problems are fixed almost always by microcode patches. If such a bug were found on a mainframe, you are right, the microcode would be patched by replacing a PROM. On an Intel CPU this is totally impossible -- the microcode is embedded in the silicon. A software patch to scan for the 4-byte sequence is also totally inadequate because any hacker could write a program to generate the code one microsecond before executing it. *Intel's only recourse is a recall.* Petz

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