用５１实现的多级菜单，对于想学习５１界面编程是一个很好的参考例子．在ＫＥＩＬ　Ｃ　７.０１上编译．-with 51 of the multi-level menu, 51 want to learn programming interface is a good example. The C 7.01 on KEIL compiler.

作者：陈明计 The Real-Time Kernel(For Keil c51)

KEIL下用51单片机编写的时钟程序，具有定点报时和调节时间功能。-KEIL under 51 MCU write clock procedures.