Computer Demo.....

Keyboard

On most computers, a keyboard is the primary text input device. (The mouse is also a primary input device but lacks the ability to easily transmit textual information.) The keyboard also contains certain standard function keys, such as the Escape key, tab and cursor movement keys, shift and control keys, and sometimes other manufacturer-customized keys.

Mouse

A mouse is a small device that a computer user pushes across a desk surface in order to point to a place on a display screen and to select one or more actions to take from that position. The mouse first became a widely-used computer tool when Apple Computer made it a standard part of the Apple Macintosh. Today, the mouse is an integral part of the graphical user interface (GUI) of any personal computer. The mouse apparently got its name by being about the same size and color as a toy mouse.

CASE/CABINET

The computer case is a very important part of the computer. It protects all the electronic components inside, and must provide adequate ventilation to prevent overheating. The case also needs to be capable of allowing you to expand your hardware if the need arises. Some cases only have 5 or 6 bays for expansion. This may not be enough if you plan to add several drives. Also there needs to be plenty of expansion slots on the back for adding PCI, ISA and AGP expansion cards. At the present, there are two basic types of cases for two different motherboard types. There are several different sizes of cases.

The smallest is the Desktop type which lies flat. The next size is the Mid Tower, then Full l Tower and finally the largest is the server case which is primarily for commercial serve computers. Below is a side view of a Mid Tower case, which is probably the most widely sold case for personal use.

Case Fan




The Case fans are relatively inexpensive and are extremely important. Computer components generate quite a bit of heat and must be kept as cool as possible. The case fan is the primary source of cooling for most computers. Although the importance of the fan is often overlooked, it is the key to a long life for a computer. Most computer cases are designed to allow a person to add one or more additional case fans.

CHIPSET [2 Separate Chips]
PCI/AGP/SA/DE Controllers

Why is it called a chipset? Because there are two or more of these on a motherboard. Chipset are kind like the motherboard's traffic cops. They direct the flow of data from one point to the other. Each chip in the chipset has its own particular job. This is the 440BX chipset. One chip links directly to the Microprocessor. Above is a picture of the 440BX Chipset. Below is the ''Intel 82443B× PCI/AGP Controller.'' It is hidden under a heat sink that protects it from overheating.

The 82443BX Chip controls the data traffic between the microprocessor and the AGP card. Both chips share the task of controling the PCI and main memory data flow. In the diagram below, you can see the data flow paths mapped out for the chipset. Paths managed by chip 1 are red. Paths managed by chip 2 are blue.                          

If you noticed, the paths between each component are refered to as ''buses.'' Buses are simply the paths, or wires, that connect one component to the other. You may have also noticed that the chips in the chipset are refered to as bridges. The ships actually are bridges that bridge the components together, and ensure that the data that can handle data the fastest. Below is a picture of both chipsets on a motherboard.