The function of buses on a computer?

Question

Hey guys

Can any of you provide me with some information on the funtion of PC buses?

Thanks :)

Answer 1

A bus in a computer is synonymous to a pathway that the electrical signal takes to get from one component to another.

It is basically collection of wires through which data is transmitted from one part of a computer to another. You can think of a bus as a highway on which data travels within a computer. When used in reference to personal computers, the term bus usually refers to internal bus. This is a bus that connects all the internal computer components to the CPU and main memory. There's also an expansion bus that enables expansion boards to access the CPU and memory.



All buses consist of two parts -- an address bus and a data bus. The data bus transfers actual data whereas the address bus transfers information about where the data should go.



The size of a bus, known as its width, is important because it determines how much data can be transmitted at one time. For example, a 16-bit bus can transmit 16 bits of data, whereas a 32-bit bus can transmit 32 bits of data.



Every bus has a clock speed measured in MHz. A fast bus allows data to be transferred faster, which makes applications run faster. On PCs, the old ISA bus is being replaced by faster buses such as PCI.



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Answer 2

Think of the motherboard on your computer like a small country with a lot of different cities. The cities are things such as the CPU, memory, and expansion slots. In this small country, each city is connected by highways. PC buses are the highways. Not all buses are created equal however. Some buses (like highways) are only two lanes, while other are eight lanes. The difference in these lanes is "bus speed".

Answer 3

A collection of wires through which data is transmitted from one part of a computer to another.

Today all computers utilize two bus types Internal bus or Local bus and Exterrnal bus also the

Expansion bus.

An internal bus enables communication between internal components such as a video card &

memory.

An external bus capable of communicating with external components such as USB or SCSI

Devices.

Answer 4

Buses are the set of wires that carry special information to or from the CPU. There are three types of buses

they are:

1. Address buses: these buses carry address given by the CPU from one unit to another in the computer.

2. Data buses: These buses carry data from one unit to other, it is a bi-directional bus i.e the data can be carried in both directions.

3. Control signal: These buses carry control signal from ALU to memory and from memory to alu and then to the output unit.



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