What is instruction set & Discuss and briefly.

What is instruction set & Discuss and briefly.

 Instruction set: An instruction set is a group of commands for a CPU in machine language. The term can refer to all possible instructions for a CPU or a subset of instructions to enhance its performance in certain situation.
The group of instruction set:
          (i) Data transfer.
          (ii) Unconditional branch.
          (iii) Conditional branch.
          (iv) Arithmetic.
          (v) Address modify

(i) Data transfer: Move data between memory and ALU registers or between two ALU registers.

(ii) Unconditional branch: Normally, the control unit executes instructions in sequence from memory. This sequence can be changed by a branch instruction.

(iii) Conditional branch: The branch can be made dependent on a condition, this allowing decision points.

(iv) Arithmetic: Operations performed by the ALU.

(v) Address modify: Permits address to be computed in the ALU then inserted into instructions stored in memory. This allows a program considerable addressing flexibility.