sti_bmove
sti_bmove(sti, t + count, 0, t, 0, b - t - count, conp->vc_cols,
sti_bmove(sti, t, 0, t + count, 0, b - t - count, conp->vc_cols,
void sti_bmove(struct sti_struct *sti, int src_y, int src_x,