/* Scrolls multiple rows of pixels, yStart to yEnd, one column to the left. 
The column that is scrolled out of the left side of the LCD will be displayed the right side of the LCD. y = 0 is at the top-left of the LCD screen. */
void halLcdHScroll(int yStart, int yEnd)
/* Scrolls multiple rows of pixels, yStart to yEnd, one column to the left. 
The column that is scrolled out of the left side of the LCD will be displayed the right side of the LCD. y = 0 is at the top-left of the LCD screen. */
void halLcdHScroll(int yStart, int yEnd)
{
  int i ;
  for (i = yStart; i < yEnd+1; i++)
    halLcdScrollRow(i);
}