Re: Pentium DEATH in user-mode

Linux Developer (kernel@chaos.pagannet.org)
Sat, 8 Nov 1997 17:25:46 -0500 (EST)


On Sat, 8 Nov 1997, Andre Derrick Balsa wrote:

> > > The instructions are correctly trapped as illegal instructions on both
> > > the Cyrix 6x86L and 6x86MX processors. I haven't tested the original
> > > 6x86 but it should do OK too.
> > >
> > > Cyrix: 1, Intel: -0.000712765430978 ;-)
> >
> > Run the program to search all of the ops (modify it to have it search all
> > 32-bits of 'em) and see if that'll crash the cyrix.
> >
> Done it already. No problems. :-)
>
> Cyrix: 2^32, Intel: -0.000712765430978 ;-)
> Cheers

The REAL test...

Cyrix Cx6x86 PR200L+, Step 2, Rev 7. BTB, BTB_RISKY, VSPM, ENABLE_HLT...

Whoops. Illegal instruction. I don't think so!

Tested on the following CPUs, all of which support VSPM..

Cx6x86 PR166+, PR166L+, PR200+, PR200L+
Cx6x86MX PR166+, PR200+, PR233+

It was kinda fun circulating it around the office and watching all the
tech support P5's crash. :)

-Phillip R. Jaenke [InterNIC Handle: PRJ5] (kernel@prj.pcimporters.com)
MIS Department, PC Importers, Inc. 800.319.9284, x4262
Head of Development, The Improvement Linux Project.