| 摘要 |
<p>PURPOSE:To store automatically the traveling locus of a cursor by storing successively the coordinate inputs at each time point in response to the coordinate fetching commands delivered at the prescribed time intervals in a period when an effective command is produced. CONSTITUTION:A cursor is shifted to an optional coordinate point on a screen 1 by the processing operations of a CPU3 according to an indication of a coordinate input device 7 like a mechanical mouse, etc. A timer device 8 serving as a coordinate fetching command generating means delivers the interruption signals to the CPU3 at the prescribed time intervals. With application of the interruption, it is decided from the presence or absence of an effective command button whether the coordinates presently indicated are effective or not. At this time point, the coordinate value of a cursor position register is compared with the past value. When the travel of the cursor is confirmed, the value of an XY register which shows the cursor posit on is stored to a coordinate memory part 6.</p> |
