编写80H号中断处理程序。中断发生时，显示彩色的0~9是个数字

titel   this program compiled sucess by masm 6.15
assume    cs:code
code    segment
start:
    mov ax,cs
    mov ds,ax
    mov si,offset disp
    mov ax,0
    mov es,ax
    mov di,200h
    mov cx,offset disp_end-offset disp
    cld
    rep movsb
;
    mov ax,0
    mov es,ax
    mov word ptr es:[80h*4],200h
    mov word ptr es:[80h*4+2],0
;
    mov ah,4ch
    int 21h
disp:
    mov ax,0b800h
    mov es,ax
    mov di,160*12+40*2
    mov dl,30h
    mov cx,10
s:
    in al,40h
    and al,0fh
    xchg ah,al
    mov al,dl
    mov es:[di],ax
    add di,2
    inc dl
    loop s    
    iret
disp_end:
    nop
code    ends
end    start