电子琴的汇编语言实现，利用TPC-H实验箱上的8253实现二级分频，同时配合以8255A，与门和DAC0832，通过扬声器放音，实现两个八度音高（包括半音）的电子琴。在软硬件相互配合下，电子琴具有弹奏和播放已存乐曲的功能，音长可控，播放速度可选，拥有美观的图形界面模拟真实琴键，且琴键随弹奏有起伏变化。利用微机内部的8253，8255A和内置扬声器，与TPC-H实验板上的8255A和LED，实现节拍器，可产生长度和速度可控的2/4拍，3/4拍及4/4拍等，LED和内置扬声器同时对节拍进行提示。-Electronic organ of the assembly language implementation, the use of TPC-H test me on the 8253 frequency sub-2 implementation, in order to simultaneously meet the 8255A, with the door and DAC0832, playback through the speakers, both realize octave pitch (including half-tone) in Electronic organ. Hardware and software at each other under the Electronic organ has played and play has kept the function of music, sound long-controllable playback speed options, with aesthetically pleasing graphical interfaces simulate the real keys, and keys have their ups and downs playing with. The use of microcomputer internal 8253,8255 A and a built-in speaker, with the TPC-H test plate 8255A and LED, metronome implementation can have a controllable length and speed of 2/4 beat, 3/4 beat and 4/4 beat and so on, LED and built-in speaker at the same time on the beat to carry out prompt.