//chuong trinh 1 diem sang chay vong tron tu A0 -> A7->C7->C0

//Neu can chay theo chieu ng lai thi thay cau lenh thu nhat bang

//cau lenh thu hai (hoan vi hai dong cho nhau)

#include<conio.h>

#include<stdio.h>

#include<dos.h>

#include<PCI.h>

void main()

{

int gt, i;

int add=Get_Addr("PCI_8255");

outportb(add+3, 0x80); //thanh ghi tu dieu khien voi cong A, C deu la mode ra

while(1)

{

gt=0x01;

for(i=1; i<=9; i++)

{

outportb(add, gt); //cau lenh thu nhat

gt<<1;

delay(500);

}

gt=0x80;

for(i=1; i<=9; i++)

{

outportb(add+2, gt); // cau lenh thu hai

gt>>1;

delay(500);

}

}

}