必做1
data segment
led1 db 3fh,06h,5bh,4fh,66h,6dh,7dh,07h,7fh,6fh
led2 db 77h,7ch,39h,5eh,79h,71h,00h

data ends
code segment
assume cs:code,ds:data,es:data
start:       mov ax,data
                mov ds,ax
                 mov es,ax
                 ioport equ 0c800h-280h
                 mov al,10000000b
                 mov dx,ioport+28bh
                 out dx,al...