该源码中有一个编译的词法语法语义的分析程序，三个处理及调度程序以及一个8255A的发声控制的汇编语言程序，希望对大家能有帮助-The compiler source code, there is a syntax of lexical semantic analysis of the procedure, three treatment and scheduling procedures, as well as an audible signal to control the 8255A ass