| 摘要 |
PURPOSE:To enable the lapse of time to be quickly known by changing the color of the time marker display for the purpose of showing the time lapse of the displayed information. CONSTITUTION:The output of a reference oscillator 1 is divided down by a frequency dividing circuit 22, and further the signals of lmin and 10min periods are made in a time generating circuit 23. At the time of writing searching information into a buffer memory 10, the signal of the specific address part of an address counter 17 is led to a change-over circuit 9, by which the input signal to the change-over circuit 9 is forcibly changed-over from the output of an A-D conversion circuit 8 to the output of the time generating circuit 23, and the time mark is stored in the buffer memory 10. At this time, the color information to be stored into the buffer memory 10 is changeable by the presence or not of the signal of a 10min period. |
