A scanner is essentially nothing but a photocopier...it is an input device. In order for the negative to be interpreted as a positive image, you MUST use software! You can use the Minolta software that comes with the scanner, or buy third-party software. But you have to have software.
Here is something from the Ken Rockwell site about negatives scanned with a 2005 version Minolta scanner:
"Scanning Negatives
"The Minolta scanner software lacks any film terms for color negative film, so the colors are awful for scans from color negatives just like with most scanners. My work is done with transparencies so I don't really care. If you scan from negatives you must buy Silverfast's HDR or VueScan to try to get decent color.
"There is no easy way to override the exposure from negatives. In some cases with thick negatives it may make the highlights too light. If that happens I tell the scanner to scan for a positive image and invert and tweak the levels in Photoshop. This is because positives scan at the full dynamic range of the scanner, and negs scan expecting a smaller density range."