Re: pentium bug continued [slightly offtopic]

Alistair Riddell (alistair@watsons.edin.sch.uk)
Sun, 9 Nov 1997 19:48:25 +0000 (GMT)

I think such things as the keyboard LEDs and Ctrl+Alt+Del are handled by
the BIOS/keyboard controller hardware unless the OS takes control of them.

Remember, keyboard LEDs and Ctrl+Alt+Del work almost as soon as the
machine is switched on, long before the OS is loaded.

On Sun, 9 Nov 1997, Stephan Meyer wrote:

> I have something very strange to report.
>
> I successfully crashed my box under linux with f00fc7c8.
> I successfully crashed my box under win95 with f00fc7c8.
> Both hard-froze, no mouse movement, no keyboard LEDs... etc.
>
> The machine did not hard-freeze under DOS!!!! Though the debug program
> locked, I was able to (a) toggle the keyboard LEDs with my keyboard and
> (b) reboot the machine by pressing ctrl-alt-del.
>
> This is very strange when compared to the opinions that have been
> surfacing on this list lately.
>
> I used the same method for crashing both DOS and windows. I started debug,
> assembled the byte sequence and pressed "g".
>
> contents of /proc/cpuinfo:
> --------
> processor : 0
> cpu : 586
> model : Pentium 75+
> clock_speed : 120 MHz
> vendor_id : GenuineIntel
> stepping : 11
> fdiv_bug : no
> hlt_bug : no
> fpu : yes
> fpu_exception : yes
> cpuid : yes
> wp : yes
> flags : fpu vme de pse tsc msr mce cx8
> bogomips : 48.03
> --------
>
> This is an Olivetti P120S notebook with a mobile pentium in a socket.
>
> Regards,
> - Stephan
>
> ------------------------------------------------
> Stephan.Meyer@pobox.com
> meyerst@informatik.uni-muenchen.de
> http://pobox.com/~stephan.meyer/
> 2A 64 F0 73 02 91 10 FC 18 CC 83 1E E2 2C 7E 79
>
> So what would an angel say
> The devil wants to know
>
> 

--
Alistair Riddell - BOFH
IT Support Department, George Watson's College, Edinburgh
Tel: +44 131 447 7931 Ext 176       Fax: +44 131 452 8594