What is the function of io/m signal in the 8085, Database Management System

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What is the function of IO/M signal in the 8085?

It is a status signal. It is used to differentiate among memory locations and I/O operations. When this signal is low (IO/M = 0) it represents the memory related operations. When this signal is high (IO/M = 1) it represents an I/O operation

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