What is OPCODE? OPCODE is the machine language. ie, while we talk or write, we do it in english; because we understand english. But a machine cannot understand direct english. So, we translate english into its level to make a machine to understand. For example, there is a translator inside all computers which translate our english into Binary language for a computer to understand and perform the required operations. Similarly, a machine language which a Microprocessor can understand is the HEXA language. These hex codes are called OPCODES which makes a microprocessor to work. As there is no translator inside a Microprocessor, we directly fnd the OPCODES for each and every instruction and we feed it alone inside a trainer kit. Those opcodes with its description are given below. The OPCODE sheet without description is also given in the main page.