Display control apparatus including a window display priority designation arrangement

摘要

A display control system is provided which includes window management circuits having a plurality of area setting registers for individually setting a plurality of window display areas on a display surface, and for judging sequentially for each window whether or not a display position on the display surface is contained in the area designated by the register. A window display priority designation circuit is also provided having a plurality of priority setting registers for setting display priority of each window, and for determining which window has higher priority among a plurality of windows which are determined as containing the present display position on the basis of the content of the priority setting register and the result of a determination of which windows contain the present display position made by the window management circuit.