: _clrrows ( n u -- Clears u rows starting at n )
    SWAP _row!
    ( u ) 0 DO
        _yinc 0 _col!
        11 0 DO 0 _data! LOOP
        _xinc 0 _data!
    LOOP ;
: _clrln ( n ) FNTH 1+ _clrrows ;
: LCDCLR 0 64 _clrrows ;
( Changes the current line and go back to leftmost column )
: _lf
    LCD_CURY C@ FNTH 1+ + DUP 63 > IF DROP 0 THEN
    DUP _clrln DUP FNTH 1+ + _zoff!
    LCD_CURY C! 0 LCD_CURX C! ;