Three divices a , b, c are connected to the bus of a computer. I/o transefers for all three devices used intrerrupt cotrool
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The CPU is interfaced using special communication links by the peripherals connected to any computer system. These communication links are used to resolve the differences between CPU and peripheral. There exists special hardware components between CPU and peripherals to supervise and synchronize all the input and output transfers that are called interface units.
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