Answer to Question #243861 in Electrical Engineering for Prem

Question

If PC = 789 H , how CPU will fetch the instruction(binary code) from memory using common bus system explain in detail. 

Answer 1

The address bus is responsible for transporting memory addresses from the CPU to other components such as main storage and input/output devices. The address bus is just one way. The data bus transports data between the CPU and other components. The data bus operates in both directions.

Each instruction cycle in a simple computer consists of the following phases: Instruction retrieval: retrieve an instruction from memory. Decode the command to determine the operation to be done. The effective address is read from memory. Carry out the instruction.