Intel EMT64 Xeon vs AMD Opteron

[David O'Brien]

[ Please don't cross post! ]

On Fri, Feb 04, 2005 at 09:25:19PM -0700, Scott Long wrote:
> Astrodog wrote:
> >From what I understand, EM64T is essentally an extention to x86, so
> >it will understand the AMD64 instructions, much the same way an
> >Athlon64 does. Opteron, once again, from what I've read on the topic
> >is "Actual" 64-bit, not an emulated version.
..
> Both the AMD and Intel offering are just extensions to the ia32 design. 
> Opteron is no more 'true' 64-bit than Nacona is.

Just as the i386 was just extensions to the 80286 design, which was just
extensions to the original 8086 design. ;-)

And just as the UltraSparc (Sparc v9) is just extensions to the 32-bit
Sparc v8.

Astrodog, I'm courous, what is the definition of a True 64-bit CPU?

-- 
-- David  (obrien at FreeBSD.org)