Learn: The ALU - Arithmetic vs Logic

Welcome!You've already learned about the importance of the CPU, the fetch-decode-execute cycle, and the roles of registers. Today, we'll build on that knowledge by exploring the ALU and how it handles arithmetic and logic operations.

What is the ALU?The Arithmetic Logic Unit (ALU) is a key part of the CPU. It performs arithmetic operations (like addition) and logic operations (like comparisons). Without the ALU, the CPU couldn't process calculations or make decisions.

Arithmetic OperationsArithmetic operations include addition, subtraction, multiplication, and division. These are used when the computer needs to calculate numbers, such as during mathematical tasks or processing data.

Logic OperationsLogic operations involve comparing values or checking conditions. Examples include AND, OR, and NOT. These operations help computers make decisions, like whether to execute a certain action.

How the ALU WorksThe ALU receives input data from registers. It processes this data based on the type of operation (arithmetic or logic) and sends the result back to registers. This result can then be used by other parts of the CPU.

Review Time!Great work! You've learned about the Arithmetic Logic Unit, its role in the CPU, and the difference between arithmetic and logic operations. Let's test your understanding!