2-4.asm

TCP_USB试验平台下的几个常见的实验的相应要求与代码

data segment 
   T0     equ   280H
   T1     equ   281H
   T2     equ   282H
   ctl53  equ   283H
data ends

code segment 
   assume cs:code ,  ds:data
start:
      mov  dx,ctl53
      mov  al,00100101B
      out  dx,al
      mov  dx,T0
      mov  al,10H
      out  dx,al
      mov  dx,ctl53
      mov  al,01100111B
      out  dx,al
      mov  dx,T1
      mov  al,10H
      out  dx,al  
      mov  ah,4CH
      int  21H
code ends
end start