Parts of the CPU - Word Drop

The CPU is the ______ of the computer. It processes ______ and instructions, these are stored in ______, and are retrieved in the ______ stage of the Fetch Decode Execute Cycle.


CPUs have three main parts: Arithmetic Logic Unit (ALU), Control Unit, and Cache. The ALU carries out arithmetic and ______ operations. Cache stores ______ ran instructions. The Control Unit controls the flow of data ______ of, and to and from the CPU.


Inside the CPU there are small stores of data called Registers. Some have specific purposes, and all contribute to the Fetch Decode Execute cycle. The ______ holds the address of the next instruction to be fetched from memory. The ______ holds the address of the current instruction to be fetched from memory. The ______ is where data fetched from memory is decoded. Finally the ______ is here the results of calculations carried out by the ALU are stored.