taglinefilesource code
max_y280kernel/chr_drv/console.cint max_y;
max_y291kernel/chr_drv/console.cmax_y = bottom;
max_y293kernel/chr_drv/console.cmax_y = video_num_lines;
max_y297kernel/chr_drv/console.cif (new_y >= max_y)
max_y298kernel/chr_drv/console.cy = max_y - 1;