From owner-freebsd-questions Tue May 11 19: 5:46 1999 Delivered-To: freebsd-questions@freebsd.org Received: from out2.ibm.net (out2.ibm.net [165.87.194.229]) by hub.freebsd.org (Postfix) with ESMTP id 5CFC0151F7 for ; Tue, 11 May 1999 19:05:44 -0700 (PDT) (envelope-from kalmadg@banet.net) Received: from banet.net (slip-32-100-114-240.ny.us.ibm.net [32.100.114.240]) by out2.ibm.net (8.8.5/8.6.9) with ESMTP id CAA45934; Wed, 12 May 1999 02:05:29 GMT Message-ID: <3738E1C2.E088A614@banet.net> Date: Tue, 11 May 1999 22:04:51 -0400 From: James Kalmadge X-Mailer: Mozilla 4.5 [en] (X11; U; FreeBSD 2.2.8-RELEASE i386) X-Accept-Language: en MIME-Version: 1.0 To: Alfred Perlstein Cc: Gurudatt Shenoy , freebsd-questions@FreeBSD.ORG Subject: Re: 486 kernel works for 586? References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG To clarify: I guess you are saying that if you compile for multiple CPU types you're all set. Yes? As per: cpu "I486_CPU" cpu "I586_CPU" cpu "I686_CPU" in the conf file. Alfred Perlstein wrote: > On Tue, 11 May 1999, Gurudatt Shenoy wrote: > > > > > Hello, > > I compiled the FreeBSD 2.2.1 kernel on a Pentium class CPU with the CPU > > type set to "I486_CPU". However, when I boot the machine and try to use > > this kernel, I get "CPU class unknown" error. > > Won't a 486 kernel work on a "586" type CPU? > > > > I'd appreciate any feedback. Please reply to my email address - I am not > > on the FreeBSD list. > > > > MUST have the CPU type that you are going to use compiled in, there > is no "forward/backward compatibility" it just must have that type of > CPU compiled in. > > -Alfred > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message