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PC, IBM compatible
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CPU
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Instruction set
3DNow!
8086 Opcode Map
AAD undocumented form by Robert Collins (1999)
AAM undocumented form by Robert Collins (1999)
AES, Advanced Encryption Standard
AMD Architecture Programmer's Manual
AVX, Advanced Vector Extensions
Breaking the x86 ISA by Christopher Domas (2017-07-27)
Complete 8086 instruction set by emu8086 (2005)
EFLAGS Cross-Reference and Condition Codes by Intel
Intel Architecture Software Developer's Manual by Intel (1997)
Intel Architecture Software Developer's Manual by Intel (1999)
Intel Architecture Software Developer's Manual by Intel (2001)
Intel Architecture Software Developer's Manual by Intel (2003)
Intel Architecture Software Developer's Manual by Intel (2004)
Intel Architecture Software Developer's Manual by Intel (2007-05)
Intel Architecture Software Developer's Manual by Intel (2008-11)
Intel Architecture Software Developer's Manual by Intel (2009-09)
Intel Architecture Software Developer's Manual by Intel (2010-06)
Intel Architecture Software Developer's Manual by Intel (2015-01)
Intel Architecture Software Developer's Manual by Intel, documentation changes
Intel Assembler 80186 and higher CodeTable by Roger Jegerlehner (2003) v2.3
Intel Carry-Less Multiplication Instruction and it's Usage for Computing the GCM Mode (PCLMULQDQ instruction)
Porting to AMD64, Frequently Asked Questions (2003-03)
RDPMC - 0F 33 - Read Performance Monitor Counter by Dr. Dobb's Journal (2002)
SSE, Streaming SIMD Extensions
Undocumented 8086 instructions, explained by the microcode by Ken Shirriff (2023-07-16)
Undocumented 8086 Opcodes by Michael Necasek (2013-12-21)
Undocumented OpCodes: ICEBP - F1 - INT01 (ICE BreakPoint) by Robert Collins (1999)
Undocumented OpCodes: LOADALL - 0F 07 - Loads the entire CPU State (386) by Robert Collins (1999)
Undocumented OpCodes: SALC - D6 - Set AL on Carry by Robert Collins (1999)
Undocumented OpCodes: UMOV - 0F 10, 0F 11, 0F 12, 0F 13 - User Move Data by Robert Collins (1999)
X86 instruction listings by About.com