| 摘要 |
PURPOSE:To increase the printing speed by effectively utilizing a memory device by a method wherein bit-mapped image information corresponding to a page image during printing is allowed to hold in a frame buffer sphere until completion of the printing. CONSTITUTION:A data control part 11 is prepared based on a signal from a host machine 20 and used in the case where layout information accumulated in a page buffer sphere of an RAM 4 is converted into bit-mapped image information and developed in a frame buffer sphere. An address control part 12 performs control for output by changing respectively a DMA address to be obtained in the case where bit-mapped image information is developed in the frame buffer sphere based on layout information of the page buffer sphere, a video address outputting in order by synchronizing the bit-mapped image information developed into the frame buffer sphere to a video clock and a refreshing address counter controlling refreshment of the RAM 4. |
