Method and apparatus for controlling plurality of memory planes.

摘要

A method for controlling memory planes in a writing operation in a display control apparatus of a graphic system, the method including the steps of selectively connecting a plurality of memory planes (2-0,...2-3) to a data bus (DATA BUS) by an interface unit (4-0,...4-3f: selectively applying a write enable signal (WE) to the memory planes from a plane designating unit (3-0,...3-31; applying data to be written to the data bus from a central processing unit (CPU); writing the data into the memory planes to which the write enable signal has been applied and which are connected to the data bus; and writing predetermined fixed data into the memory planes to which is the write enable signal has been applied but which are not connected to the data bus.