错误提示：第九行，symbol not defined:B800H
代码如下：
assume cs:codesg,ds:data
data segment
db 'welcome to masm!'
data ends
codesg segment
start: mov ax,data
mov ds,ax
mov di,0
mov ax,b800h
mov es,ax
mov si,07c0h
mov sp,16
mov cx,12
s1: mov ax,0
mov al,ds:[di]
mov es:[si],al
mov byte ptr es:[si+1],02h
add si,2
inc di
loop s1
mov cx,12
mov si,07c0h
mov di,0
s2: mov ax,0
mov al,ds:[di]
mov es:[si+160],al
mov byte ptr es:[si+161],64h
add si,2
inc di
loop s2
mov cx,12
mov di,0
mov si,07c0h
s3: mov ax,0
mov al,ds:[di]
mov es:[si+320],al
mov byte ptr es:[si+321],71h
add si,2
inc di
loop s3
mov ax,4c00h
int 21h
codesg ends
end start
请指教 |
