| 摘要 |
PURPOSE:To easily execute inspection by providing the titled device with a selecting means for selecting an address in a memory through external operation by utilizing constitution for writing and storing information from plural output means in the memory and a display means for displaying writing information in the selected address. CONSTITUTION:When an optional address in an input buffer area or an output buffer area in a RAM is selected by selecting switches SW1, SW2 and a change- over switch SW3 is turned to the display device driving side, a code signal selected by the selecting switch is inputted to an input port. A CPU writes the input of the code signal in a RAM address corresponding to the code signal and outputs a lighting signal in accordance with the contents of the address in an input buffer or an output buffer specified by a write code, e.g. to an LED circuit 1 when the contents of the address are '0' or in an LED circuit 2 in case of '1'. When the contents of the address specified by the write code are changed in accordance with the advancement of a copying sequence, the CPU replaces the displays of the LED 1 and the LED 2. Consequently, inspection can be easily executed. |
