Date: Fri, 06 Apr 2007 20:54:14 +0200 From: des@des.no (Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?=) To: Darren Pilgrim <phi@evilphi.com> Cc: freebsd-chat@freebsd.org Subject: Re: what can i do with a 486? Message-ID: <8664899vvt.fsf@dwp.des.no> In-Reply-To: <4616877D.7020205@evilphi.com> (Darren Pilgrim's message of "Fri, 06 Apr 2007 10:46:37 -0700") References: <200704051719.l35HJ2ZW018555@lurza.secnetix.de> <461584D4.4010606@gmail.com> <46158675.8060205@evilphi.com> <86fy7doos1.fsf@dwp.des.no> <4616877D.7020205@evilphi.com>
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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. 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. DES --=20 Dag-Erling Sm=F8rgrav - des@des.no
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