例: Sound程序2 speaker_on proc push ax model tiny 1 al. 61h code or 1,3 startup out 61h. al ca speaker_on pop ax mov ah 1 ret int 21h speaker_on endp call speaker_off exit o speaker_off proc push ax 1.61h and al. ofch out 61h. al pop ax ret speaker_off endp end 55 .model tiny .code .startup call speaker_on mov ah, 1 int 21 h call speaker_off .exit 0 speaker_on proc push ax in al, 61 h or al, 3 out 61h, al pop ax ret speaker_on endp speaker_off proc push ax in al, 61 h and al, 0fch out 61h, al pop ax ret speaker_off endp end 例：Sound 程序 2