| 摘要 |
PURPOSE:To improve the reproducibility of trouble to realize an inexpensive simple incircuit emulator for trouble search of a printed board unit consisting of a microprocessor and read-only memories (ROM) where programs are written. CONSTITUTION:Plural ROMs 11 to 1n where programs for trouble detection are written correspondingly to trouble events, a switching means 20 which switches ROMs 11 to 1n, a display means 30 on which the state of the printed board unit is displayed at the time of the occurrence of trouble during operation of the printed board unit 1 due to programs in ROMs 11 to 1n, and a connecting means 40 which connects ROMs 11 to 1n to the printed board unit 1 are provided to constitute the simple incircuit emulator. |
