J. D. Lohn, G. Larchev, and R. F. DeMara, "Evolutionary Fault Recovery in a Virtex FPGA Using a Representation that Incorporates Routing," in Proceedings of the Seventieth International Parallel and Distributed Processing Symposium (IPDPS-2003) - Reconfigurable Architectures Workshop, pp. 172, Nice, France, April 22 - 26, 2003. Abstract: Most evolutionary approaches to fault recovery in FPGAs focus on evolving alternative logic configurations as opposed to evolving the intra-cell routing. Since the majority of transistors in a typical FPGA are dedicated to interconnect, nearly 80% according to one estimate, evolutionary fault recovery systems should benefit by accommodating routing. In this paper, we propose an evolutionary fault-recovery system employing a genetic representation that takes into account both logic and routing configurations. Experiments were run using a software model of the Xilinx Virtex FPGA. We report that using four Virtex combinational logic blocks, we were able to evolve a 100% accurate quadrature Decoder. nite state machine in the presence of a stuck-at-zero fault. Evolutionary experiments with the hardware in the loop have begun and we discuss the preliminary results.