| 摘要 |
PURPOSE:To simplify the constitution and to improve the operability by allowing a processing circuit to perform other arithmetics processing in addition to the control of a video signal leading means to display information with a picture display means. CONSTITUTION:When a key, e.g., key PF2 of a keyboard (KB) 6 is operated on a central controller 4, the display in the figure A is performed and the operation of a VTR1 is controlled based on the display. In this case, a signal from a processing circuit 5 selects a transistor (TR) corresponding to the channel operation from TRs 13-18 via an input/output port 12. The output of the said TR is given to one input of comparator circuits 25-30 of the VTR1, and a reference voltage from reference voltage generating circuits 31-36 is given respectively to other terminal. A voltage higher than a reference voltage is applied to the line 24. A comparison output of the comparator circuits 25-30 is given to a processing circuit 45 to control a tape drive mechanism 44 via TRs 38-43. Then the control of the VTR1 is performed by push buttons 46-51. After the VTR1 is controlled, various predetermined operating processings by the processing circuit 5 are conducted. |
