80x86 - definizione. Che cos'è 80x86
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Cosa (chi) è 80x86 - definizione

TYPE OF INSTRUCTION SET ARCHITECTURE
80x86; Intel 80x86; 8x86; 80786; X86-16; Intel 80786; Intel x86; IA 32; X-86; X86 pro; X86-based CPU; X86-based system; X86 based; X86 clone; X86 compatible; Intel-based CPU; Intel-based cpu; Intel 16; Intel compatible; Intel-compatible; Intel clone; X86 architecture; Accumulator eXtended; AL register; AH register; AX register; BX register; CX register; DX register; BH register; BL register; CL register; CH register; DH register; DL register; Base pointer; DS register; ES register; SS register; DI register; SI register; FS register; GS register; X86 registers; BP register; EAX register; EBX register; ECX register; EDX register; ESP register; EBP register; ESI register; EDI register; EIP register; RIP register; RFLAGS register; RAX register; RBX register; RCX register; RDX register; RSI register; RDI register; RBP register; RSP register; GDTR register; LDTR register; IDTR register; TR register; IP register; Source index; Destination index; IAPX 86 series; X86 microprocessor
  • [[Am386]], released by AMD in 1991
  • Intel Core 2 Duo, an example of an x86-compatible, 64-bit multicore processor
  • The x86 architectures were based on the Intel 8086 microprocessor chip, initially released in 1978.
  • Alpha]], and others), and 32-bit x86 (green on the diagram), even though Intel initially tried unsuccessfully to replace x86 with a new incompatible 64-bit architecture in the [[Itanium]] processor. The main non-x86 architecture which is still used, as of 2014, in supercomputing clusters is the [[Power ISA]] used by [[IBM Power microprocessors]] (blue with diamond tiling in the diagram), with SPARC as a distant second.
  • AMD Athlon (early version), a technically different but fully compatible x86 implementation
  • Registers available in the x86-64 instruction set

80x86         
Intel 80x86         
<processor> (x86) One of the family of Intel microprocessors including the Intel 80186, Intel 80286, Intel 80386, Intel 486, in a more general sense also Intel 8086, Pentium, Pentium Pro, and Pentium II. The abbreviation "x86" also includes compatible processors, e.g. from Cyrix or AMD. (2004-02-27)
X86         
and so cannot be subject to patent claims. The pre-586 subset of the x86 architecture is therefore fully open.

Wikipedia

X86

x86 (also known as 80x86 or the 8086 family) is a family of complex instruction set computer (CISC) instruction set architectures initially developed by Intel based on the Intel 8086 microprocessor and its 8088 variant. The 8086 was introduced in 1978 as a fully 16-bit extension of Intel's 8-bit 8080 microprocessor, with memory segmentation as a solution for addressing more memory than can be covered by a plain 16-bit address. The term "x86" came into being because the names of several successors to Intel's 8086 processor end in "86", including the 80186, 80286, 80386 and 80486 processors.

The term is not synonymous with IBM PC compatibility, as this implies a multitude of other computer hardware. Embedded systems and general-purpose computers used x86 chips before the PC-compatible market started, some of them before the IBM PC (1981) debut.

As of June 2022, most desktop and laptop computers sold are based on the x86 architecture family, while mobile categories such as smartphones or tablets are dominated by ARM. At the high end, x86 continues to dominate computation-intensive workstation and cloud computing segments. The fastest supercomputer in the TOP500 list for June 2022 was the first exascale system, Frontier, built using AMD Epyc CPUs based on the x86 ISA; it broke the 1 exaFLOPS barrier in May 2022.