| 摘要 |
<p>PURPOSE:To prevent the malfunctions due to the misoperation of a mouse switch by providing a means which inhibits the operation of the mouse switch while a cursor is moved by a pseudo pulse. CONSTITUTION:The points A and B set at the output sides of the inverters 18 and 19 are connected to a control part 9 via the I/O ports 24 and 25 respectively. Then the part 9 fixes the signal levels at 'L' at both points A and B when a cursor is moved by the pseudo pulses PX' and PY' produced by the pulse generators 7 and 8 respectively. Therefore the signal levels of the output terminals 22 and 23 are fixed at 'H' regardless of the ON/OFF states of the mouse switches 16 and 17. Thus both switches 16 and 17 have no operation any more. As a result, a due menu is not carried out even though the cursor crosses a designated position of the menu. Thus it is possible to prevent the execution of an undesired menu caused by the misoperations of the switches 16 and 17.</p> |
