void setup() {
  volatile char *dirf,*dirk,x;
  volatile char *outf,*ink;
  dirf=0x30,dirk=0x107;
  outf=0x31,ink=0x106;
  *dirf=0xFF,*dirk=0x00;*ink=0x00;
  while(1)
   {
    x=*ink;
    if((x&0x01)==0x01)
    {
      *outf=0x01;
    }
    else if((x&0x02)==0x02)
    {
      *outf=0x02;
    }
    else if((x&0x04)==0x04)
    {
      *outf=0x04;
    }
    else if(x==0x08)
    {
      *outf=0x08;
    }
     else if((x&0x10)==0x10)
    {
      *outf=0x10;
    }
     else if((x&0x20)==0x20)
    {
      *outf=0x20;
    }
    else if((x&0x40)==0x40)
    {
      *outf=0x40;
    }
    else if((x&0x80)==0x80)
    {
      *outf=0x80;
    }
   }

}