Hacking VGA BOX for Under Defeat???

Hi, i have a Dell 2405FPW Monitor, when rotating the monitor so its in the vertical position, and changing the display for vertical in Under Defeat, the display is up side down!!! There is no option on the monitor to flip the screen at all, and the monitor will only physically rotating in one direction, in this case the wrong direction! Is there a way to hack my DC VGA Box, so it will flip the display???

I don't think so, the settings come from the dreamcast and the monitor, the vga box basically just provides the vga connector.

I;ve thought of the same thing, theoretically u can swap the Horizontal and Vertical Signals, that might work