INTERACTIVE COMPUTER CONTROL SYSTEM HAVING CURSOR IMAGE CHANGING DEVICE AND METHOD FOR CHANGING IMAGE

摘要

PURPOSE: An interactive computer control system having a cursor image changing device and method for changing the image are provided to decrease user stress related to interactive cursor functions. CONSTITUTION: The interactive computer control system includes a frame buffer for storing the display screen image as a pixel array, a separate display buffer for storing the current cursor image as a pixel array, together with apparatus for storing an alternate cursor image as a pixel array during the display of the current cursor image, and a unit for replacing the current cursor image with the alternate cursor image. In raster scan apparatus for maintaining screen images in the frame buffer on display screen, there are means for effecting the replacement of the cursor images during a vertical blanking period in the raster scanning.