Firmware for Raspberry Pi Pico that combines a DirtyJTAG USB probe, a Xilinx Virtual Cable (XVC) server, and a USB Ethernet interface on a single device. Intended for programming and debugging FPGAs without a separate host-side daemon for XVC. Features DirtyJTAG — USB vendor interface compatible with OpenFPGALoader, UrJTAG, and other DirtyJTAG clients XVC over TCP — lwIP TCP server on port 2542, reachable over the USB network (no xvcd-pico daemon required) USB CDC — two serial ports: debug console (CDC0) and target UART bridge (CDC1) USB NCM — CDC-NCM network adapter with DHCP server and mDNS hostname dirty-xvc.local RP2040 PIO JTAG — high-speed JTAG bit-banging on core 1, USB and networking on core 0 When an XVC client is connected, DirtyJTAG probe traffic is paused to avoid bus contention.