INSTRUCTION FORMAT

• Each instruction has two parts : 

1. Opcode
2. Operand 

• Opcode is the code for the operation to be performed.

• It is also known as Machine Code.

• Operand is the data to be operated.

• Operand can be specified as :

1. 8-bit data
2. internal registers
3. memory location
4. 8-bit / 16-bit address