汇编实验-显示缓冲区的内容

assume cs:code  
assume ds:data
data segment
    db ‘welcome to masm!‘
data ends
code segment
start:    
    mov ax,data
    mov ds,ax
    mov bx,0
    mov ax,0b800h           //不知道为什么这里写b800h会报错，说这个未定义，但是写0b800h就可以了
    mov es,ax
    mov cx,16
    mov si,00h
s:
    mov al,ds:[bx]
    mov es:[bx][si],al    
    inc bx
    mov al,02h
    mov es:[bx],al
    inc si
    loop s
    mov ax,4c00h
    int 21    
code ends
end start