| 摘要 |
PURPOSE:To prevent a program from being different from a final product and to prevent the program from the occurrence of a difference in execution time by using the instruction of the program as a method for confirming the content of a variable. CONSTITUTION:A conventional extraction circuit is eliminated and a program counter 2 in an emulation microcomputer 1 is used. The program counter 2 of the emulation microcomputer 1 and a comparison circuit 4 comparing the content of the counter 2 with the content of an available list storage circuit 3 on a designated variable program, in which a user address on the program of the variable to be checked is listed, exist as a method for extracting the content of the variable. Whenever the program executes an instruction including the designated variable, the content of the variable is recorded in a variable content recording circuit 5, and a variable content comparison circuit 6 checks whether it is the condition of an emulation microcomputer program execution control circuit 7 and an emulation microcomputer related information recording circuit or not. |
