Article View: comp.arch
Article #11646Re: What's in the '586?
From: Michael Marsden
Date: Fri, 17 May 1991 10:20
Date: Fri, 17 May 1991 10:20
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mmm@cup.portal.com (Mark Robert Thorson) writes:
> [...]
>A novel method has been developed for reducing the cost of floating-point
>performance to the end user. Each 586 has 100 bytes of EPROM for
>storing passwords unique to each chip. When a user decides to upgrade
>to hardware floating point, he simply calls Intel and buys the password
>for enabling the on-chip FPU. Each password is good for 10 gigaflops,
>i.e. you get 10,000,000,000 floating point operations. (An 8-bit
>password is sufficient, because three consecutive failed password attempts
>permanently disables the FPU). When you buy your 100th password, the FPU
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
A chip with THIS feature would make a very nice target for malicious
virus code.... :-)
... not to mention the excitement it would lend to life-critical
applications. Just imagine the entire [insert your favorite airline]
fleet crashing simultaneously because they forgot to pay for the
next 10 GFs!
-Mike Mars
PS sigh, and its not even the 1st of April...
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<1991May14.002130.4740@vax5.cit.cornell.edu> <42347@cup.portal.com>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!mcsun!ukc!newcastle.ac.uk!turing!n03vk From: Michael.Marsden@newcastle.ac.uk (Michael Marsden) Newsgroups: comp.arch Subject: Re: What's in the '586? Message-ID: <1991May17.102045.21351@newcastle.ac.uk> Date: 17 May 91 10:20:45 GMT References: <1991May14.002130.4740@vax5.cit.cornell.edu> <42347@cup.portal.com> Sender: news@newcastle.ac.uk Organization: University of Newcastle upon Tyne, UK, NE1 7RU Lines: 25