11.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！

DATA      SEGMENT
          W DB ?
DATA      ENDS

CODE     SEGMENT
ASSUME   CS:CODE,DS:DATA
start:
AA:	MOV DX,220H
	MOV AL,01H
	OUT DX,AL
	MOV DX,221H
	MOV AL,06H
	OUT DX,AL
	CALL DELAY
	MOV DX,220H
	MOV AL,02H
	OUT DX,AL
	MOV DX,221H
	MOV AL,5BH
	OUT DX,AL
	CALL DELAY
	MOV DX,220H
	MOV AL,04H
	OUT DX,AL
	MOV DX,221H
	MOV AL,40H
	OUT DX,AL
	CALL DELAY
	MOV DX,220H
	MOV AL,08H
	OUT DX,AL
	MOV DX,221H
	MOV AL,01H
	OUT DX,AL
	CALL DELAY
	MOV DX,220H
	MOV AL,10H
	OUT DX,AL
	MOV DX,221H
	MOV AL,73H
	OUT DX,AL
	CALL DELAY
	MOV DX,220H
	MOV AL,20H
	OUT DX,AL
	MOV DX,221H
	MOV AL,79H
	OUT DX,AL
	CALL DELAY
	JMP AA
delay proc
        push cx
        mov ah,86h
        mov cx,00h
        mov dx,1111h
        int 15h
        pop cx
        ret
  delay endp 
code ends
end start