单片机播放音乐实验（汇编） org 0000h ajmp main org 000bh ajmp timer0 org 0030h timer0: clr ea djnz 33h,exit mov 33h,53h djnz 32h,exit mov 32h,52h djnz 31h,exit1 mov 31h,51h djnz 30h,exit1 setb f0 ajmp exit exit1: cpl p2.1 e