主要用到了汇编语言的寻址方式和指令系统，通汇编语言来编写程序源代码来实现步进电机的加速。用到的硬件主要是可编程的并行通信接口8255，通过8255的控制字及工作方式里实现输入输出，熟悉并掌握了所学知识，将所学的知识系统化并且学会了这些知识在实践中的应用-The main use of assembly language addressing modes and instruction, pass written in assembly language source code to accelerate the stepper motor. The main hardware used is programmable parallel communication interface 8255, through the control word and work to achieve input and output in 8255, the familiar and mastered the knowledge, systematic knowledge learned and learned knowledge in practice Applications