He dieu hanh

mov dh,10
push dx
mov ah,6
mov al,0
mov bh,07
mov cx,0
mov dx,184f
int 10
pop dx
mov dl,0
mov cx,50
push cx
mov ah,2
mov bh,0
int 10
mov ah,9
mov al,20
mov bh,0
add bl,11
mov cx,1
int 10
inc dl
pop cx
loop 0117
mov ah,8
int 21
cmp al,1b
jz 144
inc dh
cmp dh,19
jnz 142
mov dh,0
jmp 102
int 20