| 摘要 |
PURPOSE:To use a CRT indicator for a multi-purpose, and to save energy, by usually operating the CRT indicator as a monitoring device for monitoring whether there is a guest or not, and operating it as an indicator of the CPU when the guest calls on. CONSTITUTION:In case when input information from a reader 4, a keyboard device 3 and a lubricator 2 exists in a CPU1, an analog switch 8 is turned on, a signal from a CRT controller 7 is supplied to a CRT video circuit 6, and information based on issue of a slip, counting up, etc. is displayed on an indicator 5. On the other hand, in case when no input information exists in the CPU1, an analog switch 11 is turned on, a signal which has come in through a TV camera signal separating circuit 10 from a TV camera 9 is supplied to the circuit 6, status of a lubricator side is displayed on the indicator 5, and it is operated as a monitoring device. |
