X86 definition

Name given to the group of microprocessors of the Intel family and to the architecture that these processors share.There are both 16-bit and 32-bit X86, the latter called IA-32 (x86-32).

The x86 microprocessors were 8086 , 80286, 80386, 80486, then continue with the Pentium.

Its immediate successor is x86-64, created by AMD (with the name of AMD64), and then Intel created its own version called Intel 64 Both implement 64 bits and are very similar to each other.

The market dominant: Intel and AMD

AMD and Intel are the two most important companies that manufacture CPUs that use the x86 instruction set.The reason for this is that it is the companies that own all the patents of that instruction set: Intel in the original 16-bit x86, 32-bit x86 (filed with the i386 in 1985), FPU operations deprecated x87 and special instruction sets like MMX and SSE that were added later.

AMD has the patent 64-bit x86 rsion, called EMM64, AMD64, x86-64 or simply x64, depending on the source you are viewing.They developed these instructions in 2003.

No other CPU manufacturer can do x86 CPU without an Intel license, and neither can they obtain 64-bit x86 without an AMD license.

VIA Technologies and another small Chinese company not well known have a license to do x86, but none of them is a player important outside the Asian market.

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