Xeon 64-bit?

[Chris Linstid]

As I understand it, Intel was all about ditching the x86 ISA with the
Itanium and IA64 ISA. However, AMD's 64-bit extension to x86 spoiled their
plans and forced them to take that path.  Basically, potential customers saw
two paths:

1. Entirely new ISA that none of our products are ready for.
2. Extension to existing ISA that our products are already working on and
can be updated as needed to support the new features.

It's no surprise that AMD won that battle. :)

On 7/9/07, Chip Marshall <chip at 2bithacker.net> wrote:
>
> On 7/9/07, Paul Lussier <p.lussier at comcast.net> wrote:
> > klussier at comcast.net writes:
> > > Do I need the ia64, the amd64, or something else?
> >
> > Well, who makes the Xeon?  I'd go with the kernel for that chipset.
> >
> > Hint:  AMD does not make the Xeon ;)
> >        iaXX stands for Intel Architecture where the XX is number of
> bits...
>
> As I understand it, the Intel Xeon 64 bit CPUs are EM64T, not IA64. The
> only IA64 CPU I know of is the Itanium. An AMD64 kernel should be
> appropriate
> on an EM64 machine. To the best of my knowledge, an IA64 kernel won't work
> at all.
>
> amd64 = em64 = x86-64[1], I believe it's generally referred to as amd64
> because
> AMD beat Intel to market with a widely used x86 compatible 64-bit CPU.
>
> [1] for certain values of "="
>
> --
> Chip Marshall <chip at 2bithacker.net>     http://kyzoku.2bithacker.net/
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