The most important of any computer is the motherboard. The motherboard is the largest board of the computer system. It is also called system board. The motherboard is located on the left side of PC’s case on the bottom. It is usually green sheet of fiberglass with many chips, resisters, the heart of the computer i.e. power supply and contains many other organs of the computer system. It also contains the memory i.e. ROM and RAM and many other supporting logic circuits to make the complete work as a proper system. Instead of motherboard "IBM" refers to it as "System Board" or "Planer Board" but sometimes other manufacturer refers to it as ‘Logic Board". It accepts the CPU, memory, various plug-in peripherals, connectors and supporting circuitry. The motherboard defines the type of system by defining the type of processors it accepts, by the chipset features and by its architecture.
IBM decided that there should be used two different types of technologies, which were being used to make personal computer. They are:
Bus Based computers
Single Board Based computers
1. Bus based computers
These bus-based computers have used the main board as the backbone of the computer system. This bus board contains number of buses through which the data can be sent from one place to another and it also contains the number of slots onto which we can connect various different devices. Mainly the expansion cards are connected onto the expansion slots. In this type of bus based computer there are three buses. These are :
Address Bus
Data Bus
Control Bus
Address Bus :
Group of lines carrying the addressing information used to describe the memory location to where the data is being transferred.
Data Bus :
A set of lines used to carry the data.
Control Bus :
It is used for carrying a set of control signals that control the flow of data.
These all buses are provided on these boards. The main advantages of this type of board is that, whenever any part fails, the board on which that part is located can be removed and replaced with a working board, very easily and so it makes the maintenance of the system very easy. In these types of computers, different parts of a system such as main processor, memory, display card etc. are put on separate cards and connected to the main system bus through expansion slots.
IBM decided that there should be used two different types of technologies, which were being used to make personal computer. They are:
Bus Based computers
Single Board Based computers
1. Bus based computers
These bus-based computers have used the main board as the backbone of the computer system. This bus board contains number of buses through which the data can be sent from one place to another and it also contains the number of slots onto which we can connect various different devices. Mainly the expansion cards are connected onto the expansion slots. In this type of bus based computer there are three buses. These are :
Address Bus
Data Bus
Control Bus
Address Bus :
Group of lines carrying the addressing information used to describe the memory location to where the data is being transferred.
Data Bus :
A set of lines used to carry the data.
Control Bus :
It is used for carrying a set of control signals that control the flow of data.
These all buses are provided on these boards. The main advantages of this type of board is that, whenever any part fails, the board on which that part is located can be removed and replaced with a working board, very easily and so it makes the maintenance of the system very easy. In these types of computers, different parts of a system such as main processor, memory, display card etc. are put on separate cards and connected to the main system bus through expansion slots.
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