ss.asm

微机原理——接口应用编程源码

STACK SEGMENT STACK
      DB 64 DUP(?)
STACK ENDS
;
DATA SEGMENT
msg      DW  -1    

DATA ENDS
;
CODE SEGMENT
     ASSUME CS:CODE,DS:DATA
;乐曲主程序
music: MOV AX,DATA
       MOV DS,AX 
A:     mov dx, 43h         
       mov al,10110001B
       out dx,al
       mov dx,63h
       mov al,10000010B       
       out dx,al
       mov si,offset msg
         mov dx,11h
         mov ax,0bd04h
         div word ptr[si]
         out 42h,al
         mov al,ah
         out 42h,al


end_mus: MOV AL,20H
         OUT 20H,AL
         RET
code ends
     end music