void
scr_n_colour(unsigned short chars_fwd, unsigned char colour)
{
    chars_fwd *= 2;
    chars_fwd += cur_pos;

    char *dest = (char *)cur_pos;

    while(dest <= (char *)chars_fwd) { /* warning: cast to pointer from integer of different size */
        ++dest;
        *dest++ = colour;
    }

    return;
}