The following tables contain all the basic vi commands. *Starting vi* Command Description vi file start at line 1 of file vi +n file start at line n of file vi + file start at last line of file vi +/pattern file start at pattern in file vi -r file re
开启A20线 在查看或编写操作系统内核时一定会遇到A20线这个问题.本人对此一直都是似懂非懂的,查了些资料,决定弄明白于是有了这篇文章.其中前一部分是翻译一篇外国博文,但光有这篇文章依旧不能清楚地说明A20线的问题.所以将另一些资料也放在一起,这样看的人应该会明白A20线的问题了. A20 gate 开启A20线(翻译) 原文地址:http://kernelx.weebly.com/a20-address-line.html When IBM PC AT System was introduce