void setup() {
 
  volatile char *dir;
  dir = 0x30; // address for ao-a7 port f
  *dir = 0xFF; // assaign this as ouput port
  dir = 0x107; // address fpr a8-a15 port k
  *dir = 0xFF; // assaign this as output port

}

void loop() {
  
  volatile char *out;
  out = 0x108;
  *out = 0x02;
  out = 0x31;
  *out=0x07;
  //out = 0x108;
  //*out=0x01; 

}