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*A different type of I/O interface does not have the RS1 and RS0 inputs. Up to two registers can be addressed by using a separate I/O read signal and I/O write signal for each address available. Assume that 25 percent of the registers at the interface with the CPU are read only, 25 percent of the registers are write only, and 50 percent of the registers are both read and write (bidirectional). How many registers can be addressed if the address contains eight bits?
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