public static void toaplan2_scroll_reg_select_w(int offset, int data, int controller) {
        toaplan2_scroll_reg[controller] = data;
        if ((toaplan2_scroll_reg[controller] & 0xffffff70) != 0) {
            if (errorlog != null) {
                fprintf(errorlog, "Hmmm, unknown video control register selected (%08x)  Video controller %01x  \n", toaplan2_scroll_reg[controller], controller);
            }
        }
    }