| 摘要 |
<p>PURPOSE:To reduce the frequency of key depression and to shorten a time required for picture switching by providing the title system with a picture switching control table and X and Y counters and using a picture switching key and a sub-picture switching key to switch a picture. CONSTITUTION:In case of switching a job A whose picture is displayed on a CRT 2 to a job B, the picture switching key on a keyboard device 1 is depressed, so that only the X counter 5 counts up its contents, and when the job address of the job A is A11, the contents are updated like A11 A21-Ax1. When the sub-picture witching key on the keyboard device 1 is depressed, only the Y counter counts up its contents, and when the job address of the job A is A21, the contents are updated like A21 22-A2y. At the time of receiving a picture switching instruction, a CRT picture switching part 10 saves the picture information of the job A in its corresponding job buffer, searches the picture switching control table 3 on the basis of the depressed key, determines a job B, and then displays the job B on the CRT 2. Since plural switching key are used and respectively job pictures are constituted in each line unit, the frequency of key depression and the switching time can be reduced.</p> |
