Q182933
Sign in to savex86 (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 8086 microprocessor and its 8-bit-external-bus variant, the 8088. 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 80
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Key facts
- CPU architecture.extensions
- x87, IA-32, x86-64, MMX, 3DNow!, SSE, MCA, ACPI, SSE2, NX bit, SMT, SSE3, SSSE3, SSE4, SSE4.2, AES-NI, CLMUL, SM3, SM4, RDRAND, SHA, MPX, SME, SGX, XOP, F16C, ADX, BMI, FMA, AVX, AVX2, AVX-VNNI, AVX-IFMA, AVX512, AVX10, AMX, VT-x, VT-d, AMD-V, AMD-Vi, TSX, ASF, TXT, APX
- CPU architecture.open
- Mixed
- CPU architecture.name
- x86
- CPU architecture.designer
- Intel, AMD
- CPU architecture.bits
- 16-bit, 32-bit and 64-bit
- CPU architecture.introduced
- 1978 (16-bit), 1985 (32-bit), 2003 (64-bit)
- CPU architecture.design
- CISC
- CPU architecture.type
- Register–memory
- CPU architecture.encoding
- Variable (1 to 15 bytes)
- CPU architecture.branching
- Condition code
- CPU architecture.endianness
- Little
Article
43 sectionsContents
- Overview
- Chronology
- History
- Designers and manufacturers
- From 16-bit and 32-bit to 64-bit architecture
- Continued support for 16-bit and 32-bit execution modes
- Basic properties of the architecture
- Floating point and SIMD
- Current implementations
- Addressing modes
- x86 registers
- 16-bit
- 32-bit
- 64-bit
- 128-bit
- 256-bit
- 512-bit
- Miscellaneous/special purpose
- Purpose
- Structure
- Operating modes
- Real mode
- Unreal mode
- System Management Mode
- Protected mode
- Virtual 8086 mode
- Long mode
- Extensions
- x87
- PAE
- MMX
- 3DNow!
- SSE
- x86-64
- AMD-V and VT-x
- AES-NI
- AVX
- {{Anchor|APX (Advanced Performance Extensions)}}APX
- See also
- Notes
- References
- Further reading
- External links
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 8086 microprocessor and its 8-bit-external-bus variant, the 8088. 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. Colloquially, their names were "186", "286", "386" and "486".
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.