IGCSE Hardware

CPU stands for?

The Arithmetic & Logic Unit (ALU) allows the required ___________ (e.g. +, - and shifting) or logic (e.g. AND, OR) operations to be carried out while a program is being run;

The Control Unit(CU) reads an ________ from memory

System Clock is used to ______ _____ ______ on the control bus to ensure this vital synchronisation takes place – without the clock the computer would simply crash!

This register stores the current instruction being decoded and executed?

this register is used when carrying out ALU calculations; it stores data temporarily during the calculations

This register stores the address of the memory location currently being read from or written to

This register stores data which has just been read from memory or data which is about to be written to memory

This register stores the address where the next instruction to be read can be found

The _______ ___ carries addresses throughout the computer system. Between the CPU and memory, the address bus is unidirectional