Draw the connection between the processor and the main memory and explain the basic operations

Connection between the processor and the main memory:

Connection between MM and Processor

(i) PC: Program counter contains the memory address of the instruction to be executed.

(ii) MAR: Memory address register holds the address of the location to or from which data are to be transferred.

(iii) MDR: Memory data register contains the data to be written or read out of the address location.

(iv) IR: The instruction register contains the instruction that is being executed.

(v) ALU: ALU is the part of the computer which performs different basic operation and arithmetic calculation.