vc_uniscr_clear_line
vc_uniscr_clear_line(vc, vc->state.x,
vc_uniscr_clear_line(vc, 0, vc->state.x + 1);
vc_uniscr_clear_line(vc, vc->state.x + offset, count);
vc_uniscr_clear_line(vc, vc->state.x, count);