what can i do with a 486?
John Baldwin
jhb at freebsd.org
Tue Apr 10 17:44:29 UTC 2007
On Friday 06 April 2007 14:54, Dag-Erling Smørgrav wrote:
> Darren Pilgrim <phi at evilphi.com> writes:
> > Dag-Erling Smørgrav wrote:
> > > Darren Pilgrim <phi at evilphi.com> writes:
> > > > Well for one you should probably not try to boot an i686 kernel
> > > > on a 486....
> > > It's not an i686 kernel. It's an i486 kernel with code to
> > > recognize and support i586 and i686 CPUs.
> > Technically it's neither. It's an i386 kernel with support for
> > 486-, 586- and 686-class CPUs.
>
> No. It won't run on an i386. Atomic operations are ridiculously
> inefficient on the i386 (no cmpxchg), so we don't use i386-compatible
> code unless I386_CPU was specified.
And support for I386_CPU was removed in 6.0.
--
John Baldwin
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