My Trak-Ball arrived in the mail yesterday. Testing it out with Missile Command hacked for analog trackball input on my Harmony cartridge. This is so much better than using a joystick! :
Video game controller:Atari 2600 and Commodore 64 Command Control Trackball - Wico Corporation — Google Arts & Culture
Vintage 1983 Wico Command Control Trackball for for Atari - Etsy
Joysticks In The Form of Trackballs: The Wico Command Control and the Roklan Un-Roller Controller - YouTube
SMS Trackball - Will it work on a VCS? - Atari 2600 - AtariAge Forums
Trackball | Ultimate Pop Culture Wiki | Fandom
Amazon.com: 9 pin to USB Dual Atari Joystick, Paddle, and Driving Adapter by iCode, DB9 Ports, Plus Edition : Video Games
Takodan on Twitter: "1983 ad for the #Atari5200 and the #Atari2600 track ball. I think the 5200 is a really nice looking console. https://t.co/GmiizqRZte" / Twitter
Atari Trak-Ball Fanatics - It's How We Trak-Bombers Roll | Facebook
Wico Command Control Track Ball (Atari 2600) – J2Games