说明：  本人为别的公司开发了一款计时器和键盘扫描汇编程序，用的是BJ8P508芯片，在义隆编译平台开发，程序简单易懂，方便入门者。
(I am the other companies have developed a timer and keyboard scan assembler, using a BJ8P508 chips, in the ELAN compiler platform development, the program simple and easy to understand, easy beginners.)