Re: Sempron, 32 bit and/or 64 bit ?
On Mon, 03 Oct 2005 17:50:01 -0300
Bruno Buys <email@example.com> wrote:
> Ron Johnson wrote:
> >On Mon, 03 Oct 2005 08:51:14 -0300
> >Bruno Buys <firstname.lastname@example.org> wrote:
> >>Ron Johnson wrote:
> >>>On Mon, 3 Oct 2005 02:07:42 -0700
> >>>Han Chunwei <email@example.com> wrote:
> >>I did a test with a sarge netinst cd back when sarge was still
> >>testing, and it did detect sata disks. I doubt it won´t detect
> >>today. By the way: semprons are 32bit even in a 64bit board (my
> >Maybe, maybe not...
> > However, since last June AMD decided to activate the 64-bit
> > extensions on socket 754 Sempron processors. Because of
> > that there are Sempron processors in the market that have
> > these instructions and processors that don___t have them.
> > How can we detect if a Sempron CPU has the 64-bit
> > instruction set?
> >I wouldn't be surprised if Debian-amd64 ran on my box.
> ># x86info
> >x86info v1.15. Dave Jones 2001-2005
> >Feedback to <firstname.lastname@example.org>.
> >Found 1 CPU
> >Family: 15 Model: 12 Stepping: 0
> >CPU Model : Athlon 64 DH7-CG <**********************
> >Feature flags:
> > fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
> > pat
> >pse36 clflsh mmx fxsr sse sse2 Extended feature flags:
> > syscall nx mmxext Fast fxsave/fxrstor 3dnowext 3dnow lahf/sahf
> Ok, its not that simple, I agree. But you mean semprons with 64
> extensions are 32_64? Isn´t it the difference between having
> extensions and being 64bit pure? You can´t run a 32bit debian
> image on a pure 64bit, that´s what I meant before.
Ah, ok. But x86-64 Long Mode (which needs a 64 bit OS) has 2
sub-modes: 64-Bit Mode & Compatability Mode. A64 Linux doesn't
disable Compatability Mode, so you *can* run a 32 bit Debian image
on a Debian-AMD64 install.