Short the TX (Transmit) and RX (Receive) pins on the CI-V connector (pins 3 and 4 of a 3.5mm plug). Use a serial terminal like or Termite .
) protocol. Designed long before USB existed, CI-V used a simple 3.5mm mono jack to transmit and receive data on a single wire. It was revolutionary, allowing operators to control their radios—changing frequencies, modes, and filters—directly from a computer terminal. The Conflict: The Great Port Vanishing Ld-c101 Usb To Ci-v Driver
But fixing the PIC firmware required the original development environment. Kenji spent two days scouring old hard drives from Kuroda’s storage. Finally, in a box labeled “YOSHIDA - DO NOT DISCARD,” he found a Panasonic Toughbook running Windows 2000, with MPLAB IDE v5.0 and a parallel-port programmer. Short the TX (Transmit) and RX (Receive) pins