// FUNCTIONS ///////////////////////////////////////////////////////////////

void _interrupt _far Loop_Water()
  {
  // loops water colors one cycle
  static unsigned int delay=0;
  int count;
  RGB_color temp1, temp2;

  // clear interrupt flag: ISR says: "don't bug me, I'm busy!"
  asm cli;

  if(++delay>=WATER_DELAY)
    {
    delay = 0;
    // save first color
    Read_Color_Reg( WATER_MIN_COLOR, (RGB_color_ptr)&temp1 );

    // change the color
    for( count=WATER_MIN_COLOR; count<WATER_MAX_COLOR; count++ )
      {
      Write_Color_Reg( count, Read_Color_Reg( count+1, (RGB_color_ptr)&temp2 ));
      } // end for count

    // close the loop
    Write_Color_Reg( WATER_MAX_COLOR, (RGB_color_ptr)&temp1 );
    } // end if time to move the water

  // set interrupt flag! "All right, what was so important?"
  asm sti;

  // reenable hardware interrupts
  outp(PIC_ICR, PIC_EOI);

  // chain to the old timer ISR
  Old_Timer_ISR();
  } // end Loop_Water

void Install_Water_ISR()
  {
  // installs the water flow effect as an ISR
  Old_Timer_ISR = _dos_getvect(TIME_KEEPER_INT);
  _dos_setvect(TIME_KEEPER_INT, Loop_Water);
  } // end Install Water ISR

void Remove_Water_ISR()
  {
  // removes the water flow ISR and restores the old one
  _dos_setvect(TIME_KEEPER_INT, Old_Timer_ISR);
  } // endRemove_Water_ISR

/////////////////////////////////////////////////////////////////////////