CMPSC 121 Chapter Notes - Chapter 2: Central Processing Unit, Machine Code, Instruction Register
Document Summary
Central processing unit or processor: arithmetic, control unit, registers, cache memory circuitry that performs operations on data two major operations: arithmetic/logic unit registers- temporary holding places for data being manipulated by the cpu. Through the bus, the cpu is able to: extract data from main memory by supplying the address of the memory cell, along with a read signal. Similarly, the cpu can place data in memory by providing the address of the destination cell and the data to be stored with a write signal. Get one if the values to be added from memory and place it in a register. Get the other value to be added from memory and place it in another register. Activate the addition circuitry with the registers used in steps 1 and 2 as inputs and another register designated to hold the result. A program is just a special type of data, a program can be stored in main memory.
