| 摘要 |
PURPOSE:To attain action analysis speedily and exactly by transmitting information to a secondary memory circuit through a gate according to the order of an instruction so as to store, preventing an instruction, which need not be executed, from being stored, transmitting the stored contents to the main body of an emulator and displaying only necessary information according to the order of the instruction. CONSTITUTION:A program reference separating circuit 12 judges the signal of a bus to which a microprocessor 5 to be measured is connected. Here, said signal is the input of a primary memory circuit 15. If said signal is not a program reference, a select gate 16A selects the output of an input circuit 11, and writing and outputting in the primary memory circuit 15 are inhibited. The selected output of an input circuit 11 is impressed and written in a secondary memory circuit 17. Then a continuity detecting circuit 14 judges the program reference. If the program is discontinuous and the instruction during the previous period is not an operational code, it is written in a secondary memory circuit 17. A signal written in the secondary memory circuit 17 is transmitted to the emulator main body part 20 according to the order of the instruction. |
