1.asm

TCP_USB试验平台下的几个常见的实验的相应要求与代码

code segment
  assume cs:code

main proc far

recyle: 
         mov dx ,2A0H
         out dx,al
         call delay
         mov dx,2A8H
         out dx,al
         call delay    
         mov ah,0Bh
         int  21h
         cmp al,0h
         jnz exit
         jmp recyle
  
 exit:   mov ah,4ch
         int 21h
main endp

delay proc near
         mov cx,1000h
lop:    
         mov bx,080h
lop1:
        dec bx
        cmp bx,0h
        jne lop1
        loop lop
        
        ret
delay endp
code ends
end main