.model small
.stack 100h
.data
freq dw 25000, 175, 196, 220, 175, 220, 262, 247, 220, 196, 175, 156, 156, 220, 220, 247, 330, 294, 262
duration db 3, 0.5, 0.5, 1, 1, 1, 0.5, 0.5, 0.5, 0.5, 2, 0.5, 0.5, 1, 1, 1, 0.5, 0.5, 3
.code
org 100h
Start:
    mov ax,@data
    mov ds,ax

    ;exit
    mov ax,4C00h
    int 21h

End Start