COMPUTER ARCHITECTURE Questions and Answers

Explain if the internal bus connects only register within the CPU, how would you get data to and from memory?

The AR or Address Register is used to select a memory address, and the Data Register is used to send and receive the data.  Both these register are connected to the internal BUS, and the Data Register acts as a bridge between the memory data BUS and internal BUS.

So first we load AR with the desired memory address and then transfer to or from Data Register.