Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 30 Apr 2003 20:31:38 +0100 | From | Jamie Lokier <> | Subject | Re: software reset |
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Eric W. Biederman wrote: > > On Wed, Apr 30, 2003 at 05:04:59AM -0600, Eric W. Biederman wrote: > > > > > > And as an interesting data point all a triple fault does on a modern > > > system is to put the cpu in a weird stopped state. Some hardware > > > usually the southbridge then detects this and if properly configured > > > will trigger the reset line. > > > > > > I believe this may actually go back into history as far as the 486 but > > > I have not done the researched to see how far back this behavior goes. > > > > Try 286. It was the fastest (actually only) way to make a 286 switch back > > from protected to real mode. > > A triple fault would put a 286 into coma mode? And the hardware had to > reset the chip?
And then, after the reset, a flag would tell the BIOS to jump directly to application's real mode code instead of booting as usual.
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