On Fri, Nov 14, 1997 at 10:13:45AM +0000, f.debruijn@bhtafe.edu.au wrote:
> > To: melblinux@luv.asn.au
> > Subject: New Intel Pentium bug?
> > From: Nathan Bailey <Nathan.Bailey@cc.monash.edu.au>
> > Date: Sun, 09 Nov 97 17:29:35 +1100
>
> > Anyone heard anything about this?
> >
> > ------- Forwarded Message
> > Date: Sat, 08 Nov 1997 10:45:23 +1100 (EST)
> > From: Kai OYang <Kai.Oyang@fcit.monash.edu.au>
> > Subject: WARNING: New Intel Pentium bug...
> >
> > [... snip ...]
> > Recently a new Pentium bug has been floating around in comp.sys.intel.
> > It's a microcode bug that will hang a machine for all Intel Pentiums, even
> > in user mode, requiring a hard reset. I've tested it on P5-233MMX/P5-120 with
> > NT, DOS, Win95, Solaris for Intel, all hung solid. As I don't have an AMD /
> > Cyrix / P2 machine so don't know if they are also affected.
> > [... snip ...]
> > ------- End of Forwarded Message
> >
> >
> Dr.Dobb's Journal August 1997 has an artical " inside the pentuim II
> math bug by RobertR. Collins -rcollins@x86.org" and included on the accompanying CD
> is a programme (FISTBUG.EXE plus source code) to test for
> the bug on your system.
I think FISTBUG.EXE is actually a different bug. From memory, it's a
problem with the carry bit being set, or not being set incorrectly in
some cases. I know it affects the ppro, and I suppose the p2 as well.
The new pentium bug is an illegal opcode, afaik and it works nicely. 8)
Mark Brophy