[Info-vax] OpenVMS I64 on IA-64, and x86-64 nomenclature history

[David Wade]

On 12/12/2019 22:27, Grant Taylor wrote:
> On 12/12/19 3:02 PM, Stephen Hoffman wrote:
>> You're thinking of what Microsoft called Microsoft Windows XP 
>> Professional x64 Edition.
> 
> Okay.  I can't / won't argue with that.
> 
>> Which does (or did?) boot on x86-64 systems.
> 
> Not only did it boot on x86-64 systems, but it would not boot on x86-32 
> systems.
> 
> Well, the boot loader would technically boot far enough to display an 
> error to say that it required a 64-bit CPU.
> 
>> This is not what Microsoft calls Microsoft Windows XP 64-bit Edition.
> 
> Oy vey!
> 
>> Confusing?
> 
> Yes.
> 
> 
> 

Much of the confusion over 64-bit XP that runs on AMD64 arises because 
Microsoft only produced it to full fill some contractual obligation and 
it was never intended for general use. From what I remember its only 
"XP" in name, the code base is Windows Server 2003 with the desktop 
components added.

Dave