taglinefilesource code
max_y307drivers/char/console.cint max_y;
max_y318drivers/char/console.cmax_y = bottom;
max_y320drivers/char/console.cmax_y = video_num_lines;
max_y324drivers/char/console.cif (new_y >= max_y)
max_y325drivers/char/console.cy = max_y - 1;