9fb.asm

几个接口实验的代码。内含：8253、8255、8237、8251、DA0832、AD0809等芯片的实验代码！

code segment
   assume cs:code,ds:code
start:
    mov ax,code
    mov ds,ax
l1: mov al,33h
    mov dx,210h
    out dx,al
    mov dx,211h
    out dx,al
    call delay
l2: mov al,0cch
    mov dx,210h
    out dx,al
    mov dx,211h
    out dx,al
    call delay
l3: mov ah,01
	int 16h
	jz l1
exit: mov ax,4c00h
	int 21h
delay proc
      push cx
      mov ah,86h
      mov cx,00H
      mov dx,3e8h
      int 15h
      pop cx
      ret
delay endp 

code     ends
   end     start