将BMP，24位图读入内存中。看代码后就能理解了。

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

24位色BMP转换8位色BMP的算法，从24位真彩色转换为8位彩色的算法，效果可以，失真误差比较均衡，算法效率也比较高。(24 bit color BMP conversion 8 bit color BMP algorithm, from 24 bit true color to 8 bit color algorithm, the effect is good, the distortion error is more balanced, the efficiency of the algo