http://www.actionpinball.com/tech/ww.htm

Google is your friend. And you can pick up a rom from many people here on pinside or buy your own burner. I see no reason at all to go backwards unless you use tokens in your machines which I believe is a very small amount of people.

WhiteWater LH-6
Checksum: $7905

NOTE: This is an 8 megabit ROM (27C080 or equivalent).

Changes since L-5:
- Display effect for combos now shows "X 5" during 5X mode.
- Occasional big scream at game start / player add.
- Occasional Big Foot scream when the final ball drains down an outlane.
- Initials timing out no longer causes them to reset.
- Vacation planer is no longer displayed during multiballs.
- Lost Mine will not kick for about 1 second after No Way Out.
- Added goofy lamp effect for End Of Ball Bonus.
- Added simple ball-saver.
- 10 point switches won't score before first score of a ball.
- Big Foot Hot Foot is now correctly cleaned up at tilt.
- Jet Bumper values corrected for multiplayer games.
- Bonus Held value corrected for multiplayer games. Added a page in Bonus
count (including last ball). Added Bonus Hold award on additional
ramp shots (6, 35, 65, 95). River Class no longer reset when bonus
is held.
- Camera Craze is now awarded on loops.
- Boomerang Bend (large right loop) is awarded if a slow ball exits
through Secret Passage. (Boomerang Bend hazard is awarded before
secret passage).
- Total Bonus display is now correct in Status Report.
- BounceBack is correctly re-lit at the start of multiball, even if it
is in the process of timing out.
- Whirlpool Challenge effects show correct state when started a second
time during the same ball.
- Kickback is now fired during ball-search.
- Mode times (including 5x) are paused while the ball is out of play, and
during multiball start effects.
- Added grace period for main multiball. Scoring a jackpot during re-match
will not cancel the re-match.
- Waterfall lights restarted after tilt.
- Added game over lamp effect and music.
many improvements over l-5