Components

=CPU Components =

// ALU // The arithmetic logic unit (ALU) is a Vital part of the Central Processing Unit (CPU) The functions of the ALU are to carry-out calculation such as Adding, Subtracting, Multiplying and Dividing. The ALU also carries out comparisons or ‘Logical operations’ which answer question such as, is the number ‘A’ bigger than the number ‘B’ or equal to ‘B’?

  // Control Unit // This has three main jobs:  // IAS // IAS ( immediate access store ) holds applications that are being used on the computer, e.g.  The CPU reads data and programs kept on the backing storage and store them temporarily in the IAS's memory. The IAS is also known as RAM (Random access memory).
 * 1) It controls and monitors the hardware attached to the system to make sure that the commands given to it by the application software are used. For example, if you send something to print, the control unit will keep a check that the instructions are sent to the printer correctly.
 * 2) Controls the input and output of data so that the signal goes to the right place at the right time.
 * 3) Controls the flow of data in the CPU.

(//See "control unit" for picture//)

// ROM // Read only Memory (ROM) is memory which hold instructions when boot-up the computer. The ROM can check what Hard disk is installed and how much RAM (Random access memory). Since the memory is Read only it can be read but not changed. The ROM is found on the Motherboard in the CPU. 



// RAM // Random access memory (RAM) is memory that stores applications that are being used on the computer at that time, and is erased when the computer is turned off also known as IAS.



// Motherboard Parts //

The motherboard is the central circuit board of the computer. All the components plug it the motherboard, such as the hard drive, RAM, ROM, ISA slot, PCI slot, CMOS Battery, AGP slot, CPU socket, Parallel port, USB (Universal Serial Bus) port, Keyboard and mouse, Power supply plugin, CPU fan plugin, floppy controller, Memory slot and IDE controller. 