koal0313

dont kknow if this is the right place for this but lets say i have some rare carts i got at a great deal because after trying everything the seller could he could not get them to work is there a way to reprogram the original rom back to the cart? some of these ive only dreamed to be part of my collection and ill keep them in with my carts non working if i must but i collect to play mostly but like i said hard to obtain normally any advice info on this subject would be great and thanks to whomever can steer me in to some fixed games to play review and love