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About this part: > In 2004, Intel wrote off the Itanium and cloned AMD64. AMD introduced x86-64 in 2003. You don't just clone an ISA (even if based on AMD doc
by tverbeure 1y ago
About this part:
> In 2004, Intel wrote off the Itanium and cloned AMD64.
AMD introduced x86-64 in 2003. You don't just clone an ISA (even if based on AMD documents), design it, fab it etc. in a year or two. Intel must have been working on this well before AMD introduced the Athlon64.
- mjg59 1y agoThe ISA was published in 2000, there was plenty of time to start working on an implementation before AMD shipped actual product.
- tverbeure 1y agoThanks! I didn’t know AMD published it that early, but that makes much more sense then Intel “cloning” it as a reactive move to Athlon64 having it. (Though you could certainly make the case that it was reactive move by Intel marketing to enable it.)