单片机打铃程序，大学时的课程设计，用汇编语言写的，对初学汇编语言的人很有帮助，里面有按键消抖、打铃设置等很多实用的子程序-SCM ringing program, college, curriculum design, written in assembly language, assembly language for beginners who helps, there are key debounce, rang the bell set routines, and many other

a small operating system for a college bell, it has lcd , keypad buzzer and mini os

asimple college bell using led and buzzer