说明：  于CMOS具有比磁盘更好的隐蔽性和正常DOS下的不可访问性，所以利用CMOS对软件进行加密是防止软件非法拷贝的一种方法。本文将重点介绍通过C语言利用CMOS对软件进行加密防止非法拷贝的实现方法。
(Better than the disk in the CMOS with the hidden nature and the normal is not accessible under DOS, so the use of CMOS for software encryption to prevent unauthorized copying of software, one way. This article focuses on the use of CMOS through the C language the software is encrypted to prevent illegal copying of the realization method.)