Using this region of video memory to output characters and the I/O ports to tell the video controller where to draw the cursor, it is now your job to write a text driver for your operating system.

• 使用显存的这个区域来输出字符，并通过I/O端口告知视频控制器在哪里绘制光标，现在你的工作就是为你的操作系统写一个文本驱动程序。