Re: VI reasons (was Re: Base Set: Suggested additions & removals.)
Jason Gunthorpe <jgg@gpu.srv.ualberta.ca> writes:
> On Thu, 11 Jun 1998, Hamish Moffatt wrote:
>
> > > Tried booting from a floppy created with dd?
> >
> > Same problem, if memory serves correctly. Will check it out asap.
> Upon reflection it occures to me that there are two other possibilities
> 1) The bios calls to access high memory make it so that the kernel routine
> to do <something> (page table setup?) reboots the machine
> 2) It does not get properly copied to the 1 meg location and reboots
> because it executes random memory during decompression.
I'm told problem is related to turning on the "A12 Gate" and the
cache. It was never explained to me in detail, but it has something
to do with the cache having the wrong contents (or rather the wrong
tags on the contents) after the A12 line was set. It was never clear
to me why they couldn't just clear the cache after turning on the A12
gate. You could ask on the kernel list.
LILO, ldlinux.sys, and the built in boot block (dd) exibit the
problem. Grub can boot them just fine.
Steve
dunham@cps.msu.edu
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