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DEPARTMENT OF INFORMATION TECHNOLOGY::SVECW Page 22 In this example, the bus consists of two vertical columns of conductors. Each of the major system components occupies one or more boards and plugs into the bus at these slots. Thus, an on-chip bus may connect the processor and cache memory, whereas an on-board bus may connect the processor to main memory and other components. This arrangement is most convenient. A small computer system maybe acquired and then expanded later (more memory, more IO) by adding more boards. If a component on aboard fails, that board can easily be removed and replaced.
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