武汉理工大学的MCS-51单片机实验指导书，包括实验有：实验系统基本操作、汇编语言程序设计简单应用、并行 I/O 接口使用、并行 I/O口扩展实验和定时/计算器 8253A 应用。-MCS-51 microcontroller guide books Wuhan University of Technology, including experiments are: experimental system basic operation, assembly language programmin

利用51单片机实现的计算器，可以进行简单加减乘除运算(Use a calculator for the implementation of 51 single-chip microcomputer, operation simple addition, subtraction, multiplication, and division)