说明：  屏的显示模式是262k色的，输入的数据是666格式的，由于1289本身的限制，只能显示18位色，而BMP图片是24为，所以最低两位数据被丢掉。
(Screen display mode is a 262k color, type of data is 666 format, due to the limitations imposed by the 1289, can only display 18 colors, and BMP image is 24 for, so a minimum of two data is lost.)