6-pin mini-din connector-2. db-9 to db-25 pin adapter-3. din-9 connector-a 6-pin mini-din connector is more commonly known as a ps/2 connector. ps/2 mouse interface is a type of mouse interface that uses a round din-6 connector that gets its name from the first computer it was introduced on, the ibm ps/2.all computers came with at least one serial port that the mouse could use with its female db-9 connector. if the port was of the 25-pin variety, the user could plug the mousess db-9 connector into the adapter that was usually included with the mouse to allow it to work.a din-9 connector plug is used to connect to a bus mouse port.
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