| 摘要 |
PURPOSE:To improve operabilities by providing a control means controlling an operational panel so as to identify a key capable of setting and a key incapable of setting. CONSTITUTION:An input corresponding ROM 103, a data housing RAM 104, a display data buffer 105, a CRT controller 106, a touch switch 114, a matrix 107 for decoding an operational state, and a copying controller 109, etc., are connected with a bus 102. Then, a video RAM 110 storing the image data of a CRT 113 is connected to the buffer 105. Then, the CRT 113 via a PIS convertor 112 is connected to the video RAM 110 and the CRT controller 106. Further, the CRT 113 and the touch switch 114 have the control means. The key which cannot be selected is displayed with a gray color, so that an operator recognizes the impossibility of selecting, and the efficiency of a key operation is attained. |
