| 摘要 |
<p>PURPOSE:To clearly discriminate a window to be operated by an operator as an operating object by changing the contents (form) of a cursor pattern memory corresponding to an active window compared with other windows. CONSTITUTION:A microprocessor 1 writes previously a cursor pattern into the memory 42 of a cursor pattern generator 4. Then the coordinates on a screen requiring the shift of a cursor are written into RX and RY of a cursor coordinate register 40. Then RX and RY are compared with the raster coordinates and the cursor pattern is outputted onto a line 107 when the coincidence is obtained from said comparison. Such circuits are prepared in the same number of windows and therefore the cursor can be displayed at every window. Then a window to be the operating object by the operator can be easily discriminated and the operability of a display device is improved.</p> |
