Bus lines provide data pathways that connect various system components.
A Bus line- also know as data bus or simply bus connects the part of the CPU to each other. It also links the CPU to various other components on the system board. A bus is a data roadway along which bits travel. Such data pathways resemble a multilane highway. The more lanes there are. tje faster traffic cam go through. Similarly, the greater the capacity of a bus, the more powerful and faster the operation. A 64-Bit bus has greater capacity than a 32 - Bit bus.
A system unit has more than one type of bus line. The principal bus lines (or "architectures") are :
- Industry standard architecture (ISA) was developped for the IBM Personal Computer. First it was an 8-Bit wide data path; then it was 16 Bits wide. Although too slow for may of today's application, the ISA but is still widely used.
- Peripheral component interconnect (PCI) was originally developed to meet the video demands of graphical user interfaces, PCI is a high-speed 32 Bit or 64-Bit bus that is over 20 times faster than ISA buses. The PCI is expected to replace the ISA bus in the near future. PCI buses are widely used to connect the CPU, memory and expansion boards.
- Accellerated graphics port (AGP) is over twice as fast as the PCI bus. While the PCI bus is used for a variety of purposes, the AGP bus is dedicated to the acceleration of graphics performance. Widely used for graphics and 3-D animations, the AGP is replacing the PCI bus for the transfer of video data.
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