// Bai2_3.cpp : Defines the entry point for the console application.

//

#include "stdafx.h"

#include<conio.h>

#include<stdio.h>

#include<dos.h>

#include<PCIXP.h>

void main()

{

int x;

int add;

add = Get_Addr("PCI_8255");

outportb(add+3, 0x90); // Tu dieu khien cho phep cong A mode vao, cong C mode ra

do{

x = inportb(add); // Doc mot byte tu cong A

outportb(add+2,x); // Viet Byte nay ra cong C

}while(!kbhit()&&x!=255); // Chung nao x = 255 (x = 0xFF) hoac bam 1 phim tren ban phim thi thoat chuong trinh

}