这段代码有错吗，解决方法

这段代码有错吗，
assume cs:code,ds:data,ss:stack
data segment
dw 0123h,1234h,2345h,3456h,4567h,5678h,6789h
data ends

stack segment
dw 0000h,0000h,0000h,0000h,0000h,0000h,0000h
stack ends

code segment
start :
mov ax,data
mov ds,ax

mov ax,stack
mov ss,ax
mov sp,0020h

mov bx,0000h
mov cx,000dh

s:
push [bx]
add bx,0002h
loop s

mov bx,0000h
mov cx,000dh
d:
pop [bx]
add bx,0002h
loop d

mov ax,4c00h
int 21h
code ends
end start
------解决方案--------------------
mov ax,stack
mov ss,ax
mov sp,0020h

执行到这就不对了。
------解决方案--------------------
assume cs:code,ds:data,ss:stack
data segment
dw 0123h,1234h,2345h,3456h,4567h,5678h,6789h
data ends

stack segment
dw 0000h,0000h,0000h,0000h,0000h,0000h,0000h
stack ends

code segment
start :
mov bx,0000h
mov cx,0007h

mov ax,data
mov ds,ax

mov ax,stack
mov ss,ax
mov sp,0020h

s:
push [bx]
add bx,0002h
loop s

mov bx,0000h
mov cx,0007h

d:
pop [bx]
add bx,0002h
loop d

mov ax,4c00h
int 21h
code ends
end start
;编写过程中出错，主要是没注意，堆栈是字操作，不是字节操作，所已刚开始时循环14次，而正确的是循环7次，故出错