Microprocessor for inserting a bus cycle in an instruction set to output an internal information for an emulation

摘要: A microprocessor having a buffer or memory capable of holding plurality instructions in advance execution also functions to insert special bus cycle amongst the for outputting internal information outside predetermined operation mode at time each execution. The inside microprocessor, which is be outputted cycle, identified by address executed instruction space, an code identifying said group prefetched. In emulation system using prefetch type as described above, what has been can easily known from effect accurate analysis and facilitate trace data thereby improve debugging efficiency.