| 摘要 |
PURPOSE:To automatically add information discriminating a valid buffer memory and an invalid buffer memory when data are written in several buffer memories among plural buffer memories. CONSTITUTION:A selector 2 to input data from an outside processor 1 writes the data while selecting one of plural buffer memories 3-6. Simultaneously, information is inputted to a write flag part 7 so as to show which one of the buffer memories 3-6 is selected. Then, the contents of the buffer memories 3-6 and the contents of the write flag part 7 are simultaneously outputted by using a read circuit 7. According to the contents of the write flag part 7, it is discriminated which one of the buffer memories 3-6 is selected to write the data, and the contents of the buffer memories 3-6 are written in an image memory 11. |
