应各方要求，北理工珠海学院计算机学院微机课程设计音乐播放器－微机原理指导书＋课程设计（接线图＋原理图＋完整程序＋设计分析）8253 8255 8259 汇编-Request of the parties, Northern Polytechnic, Zhuhai College of Computer Science, curriculum design, computer music player- the guiding principle of the book+ computer cou