为什么通不过编译？
assume ds:data,ss:stack,cs:code
data segment
time: db "20??/??/?? ??:??:??",0
routine: db 9,8,7,4,2,0
data ends
stack segment
db 12 dup (0)
stack ends
code segment
start:
mov ax,data
mov ds,ax
mov si,offset time+2
mov di,offset routine
mov ax,stack
mov ss,ax
mov sp,12
mov cx,6
lp:
push cx
mov al,ds:[di]
out 70h,al
in al,71h
mov ah,al
mov cl,4
shr ah,cl
and al,00001111b
add ah,30h
add al,30h
mov byte ptr ds:[si],ah
mov byte ptr ds:[si+1],al
inc di
add si,3
pop cx
loop lp
mov ax,0b800h
mov es,ax
mov di,160*12
mov si,offset time
show: mov cl,[si]
mov ch,0
jcxz ok
mov es:[di],cl
inc si
inc di
inc di
jmp show
ok: mov ax,4c00h
int 21h
code ends
end start
