An optimized interface for simulation and visualization data transfer between an emulation system and simulator is disclosed. In one embodiment, a method of transferring data between a simulator to an emulator across an interface, comprises updating a simulator buffer of the simulator to contain a desired input state for an emulation cycle. A target write to the interface is performed to indicate that the emulation cycle can proceed. The emulation cycle is completed using an instruction sequencer within the interface independent of the simulator.
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