CPS-2 jumpers? What do they do?

When I changed battery on my D&D2, I noticed two sets of jumpers, arranged just like dip-switches on a regular JAMMA-board, and wonder if anyone knows what they do?

On this board, someone has changed some of the settings, so they probably do something, right?

I can't seem to find anything about this, so I figured I'd check if someone here knows anything about it...

(Posted this in the Arcade section earlier, but maybe it's more appropriate here)

AFAIK There are no physical configuration DIP switches inside CPS2 game boards (B Boards).

If you are refering to the sets of jumper pads located below the the GFX roms (sets are also near the Sample and Qsound roms) then these are to allow for different sized Roms to be used on the same board design. The highest address lines are jumpered to these pads and from there are either pulled to 5V or linked to one of the onboard address decoding PAL's.

MrS