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This paper introduces a new generic platform for onboard payload signal processing. The system is built up around an NoC with a bridge to an AMBA system which supports easy integration with existing AMBA based platforms. With the use of a pthreads interface the platform allows for simple programming and easy extension. For prototyping purposes, an implementation has been made on an FPGA together with a range of I/O options to assess its capabilities. SpaceWire and other interfaces support the extension of the demonstrator platform across multiple boards and allow to connect it to onboard networks and systems. This paper shows that novel and established chip architectures can be integrated in a way that combines their benefits, and represents a promising candidate architecture for future on-board processing platforms.