linux 下CS8900驱动程序，适用于linux 2.4内核，移植时修改总线访问方式就可以了-under linux CS8900 driver, applicable to the linux 2.4 kernel. Bus transplantation changes can visit on the way

实验要求： （1）用两个线程a和b来模拟Etherneth上的两台主机。 （2）用一个双字类型变量Bus来模拟总线（将其初始化为“\O”，并且总线等于“\O”时表示总线空闲）。-Experimental requirements: (1) with two threads a and b to simulate Etherneth on the two hosts. (2) with a two-word type variable Bus to simulate the bus (ca