Computer Bus

Introduction: The bus is just a circuit that connects part of the motherboard to another part. The more data the bus can process at one time, the faster the information transfer rate. The bus speed measured in megahertz (MHz) represents the amount of data that can be moved simultaneously on the bus. The bus speed is usually the speed of the front side bus (FSB) connecting the CPU to the north bridge. FSB speed ranges from 66 MHz to over 800 MHz. Since the CPU reaches the memory controller via the north bridge, the speed of the FSB can greatly affect the performance of the computer.

A computer architecture bus is a very important component of a computer. A bus is a subsystem that moves data between elements within a computer or between computers. The system bus is an independent computer bus that connects the major components of a computer system, which is used to reduce costs and improve modularity. Transfer information by combining the functions of the data bus, determine the destination of the data with the address bus, and identify the function with the control bus. One of the main purposes of the bus is to reduce the number of lines required for communication.

The computer's microprocessor is the most important part of the PC, but that alone does not work. One of several major components is a bus that is also known as a computer highway. The bus transfers data between processor, random access memory, and hard disk. Bus speed depends on the type of motherboard installed (white 119). Random Access Memory - RAM is also connected to the motherboard base of all components, but unlike BUS, RAM can be easily removed and replaced. The random access memory is used as a scratch pad area for the central processing unit (white 43). The capacity of the random access memory is very important to the performance of the computer. If there is not enough RAM, the software can create space on the hard drive for use as temporary operational memory (white 31). Random means that you can access any part of memory at any time. You do not need to read all the memory to find the location.

The address bus is a computer bus that consists of a series of lines that connects two or more devices and specifies physical addresses. When the R3900 processor needs to read / write the memory location, it specifies the location of the memory on the address bus sent over the data bus. The width of the address bus determines the amount of memory that the system can address. The Toshiba R3900 processor core address bus can address 232 (4, 294, 967, 296) storage locations, ie 32 bits. If each memory address is held in 1 byte, the addressable memory space is 4 GB. The address bus is unidirectional and the number is only sent from the microprocessor to memory and is not transmitted in other ways.