Patent ID: 7737984

Claim:
A system for displaying images in at least one display window on a display unit, comprising: a display processor configured to generate graphics commands from a received input; a graphics processing unit coupled to the display processor and configured to generate graphic data from the graphics commands, the graphics processing unit comprising: a rendering engine; an internal memory coupled to the rendering engine; and a general purpose I/O coupled to the rendering engine and configured to transmit messages from the graphics processing unit; a graphics logic device coupled to the graphics processing unit and directly connected to the display unit, the graphics logic device configured to initiate a transfer of the graphic data for display in a display window from the internal memory to the display unit upon receipt of a message indicative of the graphic data being available; and an external memory operably coupled between the graphics logic device and the display unit thereby providing a second coupling from the graphics logic device to the display unit, the external memory configured to receive a copy of the graphic data from the graphics logic device and to supply the copy of the graphic data to the display window when the message indicative of the graphic data being available is not received by the graphics logic device and to store a copy of the update of the graphic data for the display window as the display window receives the update of the graphic data from the internal memory directly from the graphics logic device.