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The DMA and the CPU share the memory bus; the DMA has priority over the CPU...

The DMA and the CPU share the memory bus; the DMA has priority over the CPU for control of the bus. Suppose the DMA controller is transferring characters to main memory from an external device transmitting at 9000 bits per second (bps). The CPU can fetch instructions at the rate of 1 billion instructions per second (109 ∗ 8 bps). By what percentage would the processor be slowed down due to DMA activity.

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