Date: Thu, 13 May 1999 17:59:45 -0500 (CDT) From: Gurudatt Shenoy <gurudatt@cs.tamu.edu> To: James Kalmadge <kalmadg@banet.net> Cc: Alfred Perlstein <bright@rush.net>, freebsd-questions@freebsd.org Subject: Re: 486 kernel works for 586? Message-ID: <Pine.GSO.3.96.990513175830.8912D-100000@dilbert> In-Reply-To: <3738E1C2.E088A614@banet.net>
next in thread | previous in thread | raw e-mail | index | archive | help
Actually, I was asking if I could compile for "I486 _CPU" and then run this kernel on a Pentium Class CPU (backward compatible?) But someone pointed out that this is not possible... On Tue, 11 May 1999, James Kalmadge wrote: > 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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.GSO.3.96.990513175830.8912D-100000>