During April 2025, Dave contributed to the YosysHQ/yosys repository by addressing a synthesis compatibility issue for ECP5 FPGAs. He enhanced the ECP5 block RAM blackbox models by adding missing clock multiplexer parameters, ensuring correct synthesis with tools like Diamond and reducing the risk of build failures. This work, implemented in Verilog and Python within the techlibs/lattice directory, improved cross-tool reliability and minimized downstream debugging time for FPGA workflows. Dave’s focused bug fix demonstrated a strong understanding of FPGA design and hardware description languages, delivering a targeted solution that deepened the robustness of synthesis flows in open-source hardware projects.