assembly - 执行 16 位加法的程序溢出错误

Question

.model small
.stack 200
.data
arr dw 1234h,4321h,1dup(?)
.code
start:
mov ax,@data
mov ds,ax
xor ax,ax
lea si,arr
mov ax,[si]
mov bx,[si+2]
add ax,bx
mov [si+4],ax
int 03h
end start 

错误是：

(4)溢出！-无法评估：arr dw 1234h,4321h,1dup(?)

Answer 1

1dup(?)需要空格：1 dup (?).