From owner-freebsd-amd64@FreeBSD.ORG  Fri Feb 25 20:03:56 2005
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Date: Fri, 25 Feb 2005 12:03:56 -0800
From: Mike Hunter <mhunter@ack.Berkeley.EDU>
To: freebsd-amd64@freebsd.org
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Subject: Re: AMD64 on Xenon ?
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On Feb 25, "Michael R. Wayne" wrote:

> I just powered up a dual Xenon system from one of our suppliers.
> It is acting a bit odd, Eventaully, I realized:
> 
> CPU: Intel(R) Xeon(TM) CPU 2.80GHz (2800.11-MHz K8-class CPU)
>   Origin = "GenuineIntel"  Id = 0xf34  Stepping = 4
>   Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT
> ,TM,PBE>
>   Features2=0x441d<SSE3,RSVD2>,MON,DS_CPL,CNTX-ID,<b14>>
>   AMD Features=0x20000800<SYSCALL,LM>
>   Hyperthreading: 2 logical CPUs
> 
> But note the last word on uname -a:
>    FreeBSD test.x.com 5.3-RELEASE FreeBSD 5.3-RELEASE #0: Fri Nov  5 03:50:01 UTC 2004     root@fanboy.samsco.home:/usr/obj/usr/src/sys/GENERIC  amd64
> 
> So, why would this run at all?  I was planning on reinstalling 
> anyway so it's not a huge deal but it seems pretty odd...

The "amd64" architecture should work just fine on Intel EM64 systems.  EM64 is
intel's codename for their knock-off implementation of AMD's 64 bit x86
extensions.

Mike