Working the International Space Station from a Commodore 64

Alick Gardiner describes his experience of connecting a Commodore 64 (C64) to the International Space Station (ISS) using amateur radio equipment. After obtaining his amateur radio license, he decided to explore packet radio, which allows data transmission via radio waves instead of the internet. The ISS features a packet radio repeater, making it an ideal target for his project. Gardiner explains the setup process, which involves connecting a Pakratt PK-232MBX Terminal Node Controller (TNC) to the C64 and a Yaesu FTM7250 transceiver. He details the necessary hardware connections, including using an RS232 serial cable and configuring the C64 to communicate with the PK-232.

He outlines the steps for receiving and transmitting packets, emphasizing the importance of tuning the transceiver and adjusting settings to ensure proper communication. Gardiner also provides insights into the AX.25 data protocol used for packet transmission and the specific commands required to send beacons and messages. He shares his beacon test, which included his location and equipment details, demonstrating how the signal can be relayed through the ISS to reach a broader audience. The project highlights the potential of retro technology in modern communication, showcasing how vintage equipment can still play a role in contemporary amateur radio practices.