svn commit: r314669 - head/sys/i386/conf
Rodney W. Grimes
freebsd at pdx.rh.CN85.dnsmgr.net
Sat Mar 4 15:53:43 UTC 2017
> On Sat, Mar 04, 2017 at 03:04:17PM +0000, Pedro F. Giffuni wrote:
>
> > Author: pfg
> > Date: Sat Mar 4 15:04:17 2017
> > New Revision: 314669
> > URL: https://svnweb.freebsd.org/changeset/base/314669
> >
> > Log:
> > Drop i486 from the default i386 GENERIC kernel configuration.
> >
> > 80486 production was stopped by Intel on September 2007. Dropping the 486
> > configuration option from the GENERIC kernel improves performance
> > slightly.
> >
> > Removing I486_CPU is consistent at this time: we don't support any
> > processor without a FPU and the PC-98 arch, which frequently involved i486
> > CPUs, is also gone so we don't test such platforms anymore.
>
> What is realy mean?
> Some Via CPU is like i486 (by instruction set).
>
> CPU: VIA Ezra (800.04-MHz 686-class CPU)
> Origin="CentaurHauls" Id=0x678 Family=0x6 Model=0x7 Stepping=8
> Features=0x803035<FPU,DE,TSC,MSR,MTRR,PGE,MMX>
> AMD Features=0x80000000<3DNow!>
There is also the whole 486sx family that is 486 die that they turned
the FPU feature off in cause it failed functional test at die sort.
--
Rod Grimes rgrimes at freebsd.org
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