Intellivision I and II are singular machines of their time! Using a full blast keypad, disc gamepad and multi trigger anti-ergonomic controller is the least we can say. It was a challenge to implement!

-update-
Latest version decode the keypad  but also send a raw copy of the pin scanning to the emulator. JziIntv was the first emulator to implement this feature. It keeps all special key combination and easter eggs possible!

Controller pinout


Pin 5 is ground. Pin 1,2,3,4,6,7,8 and 9 are pull-up inputs.