====== Operational Code (OPCODE) ======
[[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]]

An **Operational Code (OPCODE)** is generally 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 set of opcodes defined in its architecture.  An opcode is followed by data like address, values, etc. if needed.

Source: [[https://www.engineersgarage.com/what-is-opcode/ ]]


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