| 摘要 |
<p>PURPOSE:To input a partial working area surely with an easy operation by displaying a track of a closed passage on the screen of a display tube and indicating points of passage to be worked with a cursor to specify a working area. CONSTITUTION:A processor 103 reads out passage data from a memory 101 on a basis of a control program in an RAM104 and stores it in an RAM106 and allows this data to pass a vector generator 105a, an address counter 105b, and a screen memory 105c to display a track of a closed passage on a cathode-ray tube 105d. A cursor is displayed on the screen of the cathode-ray tube 105d through an address pointer part 105i and a luminance control part 105g. By this cursor display, the first and the second points are inputted onto said track of the closed passage, and the area between them is displayed, and the area between the first and the second points is specified as an area to be worked by the switch operation for working area input on an operation panel 102 and is inputted.</p> |
