A SEAD system is composed of two parts: The SEAD motherboard holds the CPU-independent parts of the circuitry, and the daughter card holds the processor core (CPU Module). The daughter cards can be easily swapped to allow IP integration with various cores. It can be used stand-alone or in a suitable ATX rack system. SEAD is designed with a large uncommitted FPGA (1 million gates for SEAD and 2 million gates for SEAD-2). The SEAD board includes "Basic RTL" in the FPGA. Basic RTL provides a sample CPU interface and memory controller, for fast bring-up. There are logic analyzer connectors for all FPGA inputs and outputs. There is a 480-pin expansion connector for a user-designed expansion board, 105 of which are dedicated to user board-to-FPGA connections.