What is "spacecube"

SpaceCube is a family of high-performance reconfigurable systems designed for spaceflight applications requiring on-board processing. The SpaceCube was developed by engineers at the NASA Goddard Space Flight Center. The SpaceCube 1.0 system is based on Xilinx's Virtex-4 commercial FPGAs. The debut mission of the SpaceCube 1.0, Hubble Servicing Mission 4, was the first time Xilinx's Virtex-4 FPGAs flew in space.