Question: Consider an RS-232 controller with no interrupt capability. If we are to support a 19,200 bps data rate with seven data bits, even parity, and

Consider an RS-232 controller with no interrupt capability. If we are to support a 19,200 bps data rate with seven data bits, even parity, and one stop bit, how often should we poll the controller? If each polling operation takes 200 S, what fraction of the systems time is spent polling?

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