#include <conio.h>
#include <stdio.h>
#include "mdedriverdll_9x.h"
void main()
  {
  printf("This program toggles the bits for Port A and Port B.");
//  outp(0x303,0x80);        //MAKE PA,PB of 8255 ALL OUTPUT
  MDEConfigPort(0x378, 0x80);
  do
    {
//     outp(0x300,0x55);        	//SEND 55H TO PORT A
//     outp(0x301,0x55);        	//SEND 55H TO PORT B
    MDEOutPA(0x378, 0x55);
    MDEOutPB(0x378, 0x55);
     delay(500);			//DELAY of 500 msec. 
//     outp(0x300,0xAA);        	//NOW SEND AAH TO PA, and PB
//     outp(0x301,0xAA);
    MDEOutPA(0x378, 0xAA);
    MDEOutPB(0x378, 0xAA);
     delay(500);
    }
    while(!kbhit());
  }