向内存0:200~0:23F依次传送数据0~63(3FH)

0:200~02FF一般为安全区域(8086) 2^8=256B

assume cs:abc
abc segment

    mov ax,0020h
    mov ds,ax
    
    mov cx,003fH    
s:    mov bx,cx
    mov ds:[bx],cl    
    loop s
    mov ds:[0],cl
    
    mov ax,4c00H    
    int 21H

abc ends
end