Date: Tue, 10 Apr 2007 12:48:25 -0400 From: John Baldwin <jhb@freebsd.org> To: freebsd-chat@freebsd.org Cc: Darren Pilgrim <phi@evilphi.com>, Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?= <des@des.no> Subject: Re: what can i do with a 486? Message-ID: <200704101248.25510.jhb@freebsd.org> In-Reply-To: <8664899vvt.fsf@dwp.des.no> References: <200704051719.l35HJ2ZW018555@lurza.secnetix.de> <4616877D.7020205@evilphi.com> <8664899vvt.fsf@dwp.des.no>
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On Friday 06 April 2007 14:54, Dag-Erling Sm=F8rgrav wrote: > Darren Pilgrim <phi@evilphi.com> writes: > > Dag-Erling Sm=F8rgrav wrote: > > > Darren Pilgrim <phi@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. >=20 > 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. =2D-=20 John Baldwin
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