| 摘要 |
PURPOSE:To display a complicate picture and the picture of the large quantity of data at high speed by providing a graphic memory and a means for transferring picture data to the graphic memory and applying an OR processing to the output data of the graphic memory. CONSTITUTION:A command is inputted to a computer system 11 from a console 12. The system 11 controls a bus 13 to exchange the data with an external part. The command from the system 11 exchanges prescribed data with the corresponding mapped graphic memories 11-19 by the picture data transfer means ACRT 14-16. In the memories 17-19, the data exchange is simultaneously processed in parallel and a graphic plotted by the picture data is read by a display controller 22. This read data is OR processed in a logical operation circuit 20 and the result can be observed on a display 21. Thereby, the plural graphics are plotted on the display 21 to remarkably improved processing speed. |
