NCR 5964 - External Keyboard Connector

5-16 Chapter 5: Service and Repair
External Keyboard Connector
The external keyboard connector is a PS/2-style, 6-pin, mini-DIN
connector. The following table lists the function of each pin.
Pin Symbol Description
1 DATA Keyboard Data
2 N/C Unused
3 GROUND Ground
4 +5V 5V Power
5 CLOCK Keyboard Clock
6 N/C Unused