The Cluster Base Board connects four Series 2 FPGA Boards to a small cluster node.

• 10 bit bus connected to all FPGA Boards and the external I/O connectors
• 44 bit open ring network for board to board communication. First and last FPGA Board are connected to an external I/O connector.
• Two 2x32 pin headers for external I/O. Each one contains:
  • 10 bit bus signals
  • 44 GPIO's connected to first or last FPGA Board
  • Power supply pins