说明：  上面都是C版本，最后给一个linux下as86编译的汇编版本. 就是用串口通讯线将两台机子用串口连起来进行通讯，最简单的。比如在a机上输入一个字符，在b机上能显示出来
(above are C version linux finally given a clock under the compilation compiler versions. Serial communication is to use two machines will be used Serial Link together communications, the most simple. For example, in a plane into a character, b plane will display)