The CPU Flashcards
What is a CPU?
CPU stands for Central Processing Unit. It is the part of the computer that executes essential instructions for the computer to function, (processing data) and is connected to peripherals. It is like the brain of the computer.
What are the 4 main sections of the CPU?
The Main Storage, the ALU, the Control Unit, the Immediate access store.
What is the Fetch-Decode-Execute cycle?
The process that the CPU goes through to carry out instructions on a computer. First the information is fetched, then the instruction is decoded, then it is executed, and this cycle is repeated until there are no more instructions left.
What is a register?
A small amount of high speed memory that is contained in the CPU.
What is the function of the Programme Counter (PC)?
It stores the address of the next instruction in RAM
What is the function of the Memory Address Register (MAR)?
It stores the address of the next address or next function.
What is the Memory Data Register (MDR)?
It stores the data to be sent or fetched from memory.
What is the Accumulator (ACC?)
It stores the result of mathematical calculations.
