By Alexander Jack
Control Unit CU
This is the first part of the processor. It sends out signals that fetch instructions from the main memory, it then understands these instructions and carries them out.
Arithmetic and Logic Unit ALU
Carries out computers arithmetical functions such as addition, subtraction, multiplication etc. It also carries out the computers logical functions such as comparing values using IF, ANED,>, < and WHILE.
They are a small temporary memory locations located on the processor. They are used to store the data for the current instruction being processed. They are also used to store the data for the current instruction being processed.