说明：  电子琴汇编语言源程序.利用键盘，使数字键1、2、3、4、5、6、7作为电子琴按键，按下即发出相应的音调。用单片机P3.2 口发出音频脉冲,驱动喇叭。
(The keyboard is used to make the digital keys 1, 2, 3, 4, 5, 6 and 7 as the keyboard of the electronic organ, and the corresponding tone is sent out. The audio pulse is sent out with the P3.2 port of the single chip computer to drive the horn)