This is a work in progress. I will be adding more content soon. Meanwhile you can check out the Github repositories of the project:

• Atari ST SidecarT Raspberry Pi Pico firmware: The part of the firmware that runs on the Raspberry Pi Pico.
• Atari ST SidecarT Firmware: The part of the firmware that runs on the Atari ST.
• Atari ST SidecarT Test ROM: A test ROM to test the SidecarT firmware.
• Atari ST SidecarT PCB: The PCB design files.