CPU id codes (Was: Moving back the system clock)

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#42

From: Richard Elling
Date: Fri, 09 Oct 1992 20:45

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In article 7140@ampex.com, leepeng@ampex.com (Peng Lee) writes:
>  The best software license is for someone (Bill Gate) to convince 
>  the CPU maker (intel) to have one register contains a unique ID for 
>  each CPU.  (32 bits PROM programmed at the end of CPU testing cycle.) 

[un]fortunately, this would be extremely trivial to defeat... just
search for the register call and change it to something else.  Also,
the large installed base does not have ID codes already resident.

There was a discussion about this many months ago in comp.arch.  If
you are interested in more reasons why this won't work, try looking
in the comp.arch archives.

---
 Richard Elling                          Manager of Network Support
 Auburn University                       Engineering Administration
 richard.elling@eng.auburn.edu   KB4HB [44.100.0.72]  (205)844-2280

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Path: arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!ames!haven.umd.edu!darwin.sura.net!news.duc.auburn.edu!netman!elling
From: elling@eng.auburn.edu (Richard Elling)
Subject: CPU id codes (Was: Moving back the system clock)
Message-ID: <1992Oct9.204506.11421@news.duc.auburn.edu>
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Date: Fri, 9 Oct 1992 20:45:06 GMT
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