A graphics display unit providing rapid filling of predetermined areas of the display screen with one or more predefined repetitive patterns stored in the undisplayed portion of a frame buffer memory. The picture processor in executing a display list will encounter commands to load the predefined patterns(s)...http://www.google.ca/patents/US4646078?utm_source=gb-gplus-sharePatent US4646078 - Graphics display rapid pattern fill using undisplayed frame buffer memory
