The Central Processing Unit
All you need to know
Why do computers need a CPU?
What is the processor made up from?
What are the roles of the processor parts?
The Control Unit (CU)
The job of the control unit is to fetch instructions from the main memory. It will then try to understand these instructions and carry them out.
To simplify the control unit is responsible for running programs that are loaded into main memory.
The Arithmetic and Logic Unit (ALU)
Carries out computers arithmetical functions such as addition, subtraction, multiplication etc
Carries out the computers logical functions such as comparing values using IF, AND, >,<, WHILE
Registers are small temporary memory locations located on the processor.
They are used to store the data for the current instruction being processed.