Method and device for implementing single-chip microcomputer simulation using instruction replacement
A technology of instruction replacement and single-chip microcomputer, applied in the field of single-chip microcomputer simulation, can solve the problem of fewer types of simulation chips, and achieve the effect of improving authenticity and increasing types.
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[0012] Embodiment: The following will further describe the present invention in detail by taking the simulation of 51 series single-chip microcomputer as an example in conjunction with the accompanying drawings.
[0013] As shown in Fig. 1, the present invention downloads user target code to external program memory and synchronous preprocessing memory through simulation monitoring and communication interface circuit. The address line of the synchronous preprocessing memory is the same as that of the external program memory. The synchronous preprocessing memory is used to store the operands of each instruction except the opcode. The simulation monitoring circuit starts the simulation CPU and starts to execute the program in the external program memory. When the instruction replacement and port reengineering circuit monitors that the simulated CPU is about to read the opcode of a new instruction, it judges whether the new instruction is an input / output to the data bus port or the ad...
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