| 摘要 |
PURPOSE:To recognize the function of an IDEHDD interface and a simple centronics printer interface without using the actual HDD and printer. CONSTITUTION:The device is provided with a flip-flop 4 which holds the output data from the data bus of the HDD interface and supplies it to the data bus of the HDD interface, comparator circuit 7 judging the data outputted from the data bus of the printer interface and controlling the input control signal of the HDD interface, flip-flop 5 which holds the output data from the data bus of the printer interface and supplies it to the data bus of the HDD interface, flip-flop 3 which holds the data outputted from the data bus of the HDD interface and inputs it to the input control signal of the HDD interface, and buffer circuits 8 and 9 which drives the output control signal of the HDD interface and supplies it to the data bus of the HDD interface. |
