Or1ksim is an instruction set simulator (ISS) for the OpenRISC 1000 architecture. At present only the 32-bit architecture is modeled. In addition to modeling the core processor, Or1ksim can model a number of peripherals, to provide the functionality of a complete System-on-Chip (SoC).

Or1ksim implements the RSP server side. It is the implementation of this RSP server which forms the example for this application note.