what are opcodes

Opcode Wikipedia. In computing, an opcode (abbreviated from operation code, also known as instruction machine code, instruction code, instruction syllable, instruction parcel or opstring ) is the portion of a machine language instruction that specifies the operation to be performed. Beside the opcode itself, most instructions also. See more

Opcode Wikipedia
Opcode Wikipedia from www.micro-examples.com

An opcode is the first byte of an instruction in machine language which tells the hardware what operation needs to be performed with this instruction. Every processor/controller has its own.

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