Generating PORT Address for I/O Microprocessor and Interfacing by Ravinder Nath Rajotiya - October 12, 2021October 12, 20210 Generating the Ports for interfacing There are two techniques or methods for interfacing i/o devices, these are: i/o-Mapped I/O- In this method, the i/o device have separate address space and instructions exclusively for inputting or outputting the data from/to the devices. Instructions for reading/writing memory are different than i/o instructions.IN and OUT are used for i/o devices, and MOV is used for memory related operations. memory-mapped I/O- This techniques uses the common address space and instructions for communicating with the memory or the i/o. MOV instruction is used for i/o as well as memory related operations. In the following paragraph we will learn how to create the port addresses for the i/o-mapped i/o technique. We will use some address decoding logic gates for