Frank Buss is working on an Atari 2600 core for the Turbo Chameleon cartridge. He uses the Docking Station to connect a joystick to the Turbo Chameleon. At the moment the core is in a test phase, but you can download it to try it yourself. The video output is compatible with a VGA monitor and the audio also works.
Website: https://github.com/FrankBuss/TCA2601
Source: http://www.richardlagendijk.nl