Editing X86 assembly language (section)

==Mnemonics and opcodes==
{{Further|x86 instruction listings}}
Each instruction in the x86 assembly language is represented by a [[mnemonic]] which often combines with one or more operands to translate into one or more bytes known as an [[opcode]]. For example, the [[NOP (code)|NOP]] instruction translates to the opcode 0x90, and the [[HLT (x86 instruction)|HLT]] instruction translates to 0xF4.<ref name=":0" /> There are potential [[opcode]]s without documented mnemonics, which different processors may interpret differently. Using such opcodes can cause a program to behave inconsistently or even generate exceptions on some processors.