This paper describes the ARPA project. The aim of this project is to develop an opensource System-on-Chip model for real-time applications. The main component of the SoC is a MIPS based RISC processor. It is implemented using a pipelined Simultaneous Multithreading (SMT) structure, which allows exploring the Instruction and Task Level Parallelism, decrease the contexts witching time and avoid speculative execut...