seems like versions 2.x don't handle the resource sets, thus the diff dats come out with missing bios info

i noticed it when using your 83>84 diff dats, the pgm games were missing the bios roms, and the pgm resource was not in the dat, same for a couple of zn games

p.s.
sorry to abuse your board Roman eheh, but it seemed the best way to reach logiqx