说明：  ★★DOS常驻内存程序[原创]★★ 也许大家不理解意思。 驻留内存的意思就是 1）不能影响其他程序的运行。 2）自我复制。 3）某种情况下进行破坏（比如4月16日）。 对于DOS程序（病毒）来说，你起码要篡改一个中断。然后在你的中断程序中把真实的中断做一次，就神不知鬼不觉了 下面我以篡改键盘中断的病毒解释一个例子。
(** DOS memory Permanent procedures [original]* Perhaps they do not understand the meaning. The presence of the memory means a) should not affect the operation of other procedures. 2) self-replication. 3) under certain circumstances destruction (eg April 16). For DOS (HIV), you should at least tampered with an interruption. You then process the interruption of the actual interruption done once, without anybody knowing it, I would like a keyboard interrupt to distort the interpretation of a virus examples.)