Computer Components and Functions

CPU Components

• The three major components of a CPU are the Arithmetic Logic Unit (ALU), Control Unit (CU), and Memory Unit.
• The ALU carries out mathematical tasks and logic operations essential for processing instructions.

Control Unit Functions

• The Control Unit (CU) is responsible for fetching instructions from memory, interpreting them, and directing the operation of the ALU and other components.

Interaction between Memory Unit and ALU

• The Memory Unit interacts with the ALU by supplying the necessary data and instructions for processing operations.

CPU Execution Cycle

• The stage that follows instruction decoding in the CPU execution cycle is the execution phase, where instructions are carried out.

Interpretation of Software Instructions

• The Control Unit (CU) interprets software instructions and coordinates the actions of the CPU components.

Decision-making in CPU

• The Control Unit is also responsible for making decisions and selecting the proper path in a program's execution based on the instructions provided.

Primary Function of the ALU

• The primary function of the ALU is to perform arithmetic calculations and logical operations on data.

Temporary Storage in CPU

• Registers are the part of the CPU that temporarily stores data and instructions actively being processed.

Fetching Instructions

• The Control Unit is mainly involved in fetching instructions from memory when dealing with program logic.

Role of Registers

• Registers serve as high-speed storage locations for data that the CPU needs immediately during processing.

Computer Component Interconnectivity

• The bus subsystem connects all CPU components, functioning like a system of roads to facilitate communication.

Instruction Execution

• The ALU is the component of the CPU that executes instructions received from memory.

Temporary Data and Instruction Storage

• The Memory Unit temporarily stores data and instructions during processing for quick access by the CPU.

Hardware Components

• The CPU, motherboard, and power supply are among the essential hardware components in a computer system.

Function of the Bus

• The primary function of the bus is to transfer data and instructions between different components of the computer system.

Long-term Data Storage

• Components such as hard drives, disks, and CDs are responsible for long-term storage of data within a computer system.