| 摘要 |
PURPOSE:To permit the same basic information to be shared, by controlling connection or disconnection between a first address bus and a first data bus connected to a main processor, and a main memory, and between a second address bus and a second data bus connected to a frame buffer. CONSTITUTION:A bus switch 20 switches the supplying of the address buses of the main memory 12 and the frame buffer 14 from which address bus connected to a graphic processor 10, or a central processor 11. The graphic processor 10 which becomes a second processor means receives a command, and a bit of parameter information transferred from the central processor 11 which becomes a first processor means, or a main memory 12, and accesses to the frame buffer 14, or the main memory 12, and generates a character, or a graphic data. Also, the graphic processor 10 can read out the command, or the bit of parameter information also from the frame buffer 14. |
