always @(*) begin
        counter_x_max   = 0;
        counter_y_max   = 0;
        screen_width    = 0;
        screen_height   = 0;
        h_sync_start    = 0;
        h_sync_end      = 0;
        v_sync_start    = 0;
        v_sync_end      = 0;

        if(mode == vga_mode_640x480x60) begin
            counter_x_max   = MODE_640x480x60_COUNTER_X_MAX;
            counter_y_max   = MODE_640x480x60_COUNTER_Y_MAX;
            screen_width    = MODE_640x480x60_WIDTH;
            screen_height   = MODE_640x480x60_HEIGHT;
            h_sync_start    = MODE_640x480x60_H_SYNC_START;
            h_sync_end      = MODE_640x480x60_H_SYNC_END;
            v_sync_start    = MODE_640x480x60_V_SYNC_START;
            v_sync_end      = MODE_640x480x60_V_SYNC_END;
        end else if(mode == vga_mode_720x400x85) begin
            counter_x_max   = MODE_740x400x85_COUNTER_X_MAX;
            counter_y_max   = MODE_740x400x85_COUNTER_Y_MAX;
            screen_width    = MODE_740x400x85_WIDTH;
            screen_height   = MODE_740x400x85_HEIGHT;
            h_sync_start    = MODE_740x400x85_H_SYNC_START;
            h_sync_end      = MODE_740x400x85_H_SYNC_END;
            v_sync_start    = MODE_740x400x85_V_SYNC_START;
            v_sync_end      = MODE_740x400x85_V_SYNC_END;
        end else if(mode == vga_mode_640x350x70) begin
            counter_x_max   = MODE_640x350x70_COUNTER_X_MAX;
            counter_y_max   = MODE_640x350x70_COUNTER_Y_MAX;
            screen_width    = MODE_640x350x70_WIDTH;
            screen_height   = MODE_640x350x70_HEIGHT;
            h_sync_start    = MODE_640x350x70_H_SYNC_START;
            h_sync_end      = MODE_640x350x70_H_SYNC_END;
            v_sync_start    = MODE_640x350x70_V_SYNC_START;
            v_sync_end      = MODE_640x350x70_V_SYNC_END;

        end /*else begin
            counter_x_max <= 0;
            counter_y_max <= 0;
            screen_width <= 0;
            screen_height <= 0;
            h_sync_start <= 0;
            h_sync_end <= 0;
            v_sync_start <= 0;
            v_sync_end <= 0;
        end*/
    end