| 摘要 |
PURPOSE:To execute the picture drawing at high speed by setting simultaneously the display of a line and a display data between lines to each plane, and plotting a straight line consisting of two colors. CONSTITUTION:A mode register 325 sets whether one color plotting is executed or two color simultaneous plotting is executed, at the time of straight line plotting. By such setting, an output for showing '0' and an output for showing '1' are generated in case of one color plotting and in case of two color plotting respectively. A gate circuit 326 consists of an AND gate G1 for inputting the output of a mode register 325 and the output of a line style register 322, an OR gate G2, and an EOR gate G3 for inputting the output of the And gate G1 and the output of a source data register 321, inputs the output of the OR gate G2 to an ALU (computing element) 323, and inputs the output of the EOR gate G3 to the ALU 323 in the same way. |
