If x86-64 is "open" why are Intel and AMD the only manufacturers..?
The answer: it isn't open, it's proprietary. Check out x86 history, it's kinda interesting.
The answer: it isn't open, it's proprietary. Check out x86 history, it's kinda interesting.
x86-64 is patented (and the earliest CPUs with it are now over 20 years old, so probably expiring soon if not already), but original 32-bit x86 is long out of patent and there are/were quite a few other manufacturers.
https://en.wikipedia.org/wiki/List_of_x86_manufacturers
https://en.wikipedia.org/wiki/List_of_former_IA-32_compatibl...