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Date:      Wed, 8 Feb 95 11:02:47 MST
From:      terry@cs.weber.edu (Terry Lambert)
To:        wraith@csd.uwm.edu (Robert Michael Gorichanaz)
Cc:        questions@FreeBSD.org
Subject:   Re: reboot under 2.X
Message-ID:  <9502081802.AA19319@cs.weber.edu>
In-Reply-To: <199502081722.LAA06790@alpha2.csd.uwm.edu> from "Robert Michael Gorichanaz" at Feb 8, 95 11:22:05 am

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> Is the a more effective method of rebooting the CPU, other than invalidating
> the entire address space and causing the chip to have a seizure?

Force the processer back to real mode and use the keyboard controller to
strobe the reset line.

Of course getting back to real mode after you have loaded BSD code and
data all over low memory is a critical problem.

> Reason I ask is that , for some reason, my dx2-66 VLB system locks up hard
> when I try to do a software reboot under 2.x.  The OS halts properly (no
> fsck errors on start-up), but as soon as it attempts to "cycle" the CPU, I
> lock up - keyboard too - and hafta hit the reset switch.

You could argue that the hardware does not behave correctly, since only
about 5% of all hardware will not reset after "chip seizure".  8-).


					Terry Lambert
					terry@cs.weber.edu
---
Any opinions in this posting are my own and not those of my present
or previous employers.



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