This adapter allows you to connect a Standard Atari 9 pin Joystick to your Tandy TRS80 Color Computer (CoCo) 1, 2, 3 or Dragon 32, 64 computers. The adapter accepts a standard 9-pin Atari. joystick plug and converts the digital signals in to the analogue input required by the TRS80 Color Computer or Dragon 32/64.
eBay