Date: Fri, 7 Nov 1997 14:37:06 -0800 (PST) From: "Brian W. Buchanan" <brian@wasteland.calbbs.com> To: hackers@FreeBSD.ORG Subject: Re: Newest Pentium bug (fatal) Message-ID: <Pine.BSF.3.96.971107143524.25504A-100000@thought.calbbs.com> In-Reply-To: <3463605C.41C67EA6@whistle.com>
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On Fri, 7 Nov 1997, Julian Elischer wrote: > On a "genuine Intel" pentium (not pentium pro) > execution of the following sequence, 0xf0 0x0f 0xc7 0xc8 > > will stop the processor. This is doable from user mode and in > 16bitmode, or in fact any mode. > > We've checked: > K5... OK > P6... OK > P5... *SPLAT* > > no idea about the pentium II or other pentium copies. > K6? > > other pentium variants? > versions? > I just checked a Cyrix 6x86L 200+. The processor correctly signals an illegal instruction. -- Brian Buchanan brian@wasteland.calbbs.com "So now I'm an undemocratic, elitist `privacy extremist,' eh? Just like Thomas Jefferson? What's next? I'm presumed a terrorist until I turn over my encryption keys?" If privacy is outlawed, only outlaws will have privacy. Million Microbe March: Small is Beautiful.
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