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[U26, U27] CPU 2 Rom Set  (This listing is the most current official release)
Revision History: (Included for reference)
Revision 3.0
31 October 2020


Credits

Changes designed and implemented by Soren Worre.

Based on the revision L-1 software released in 1990 by Williams Electronics Games Inc.

The author would like to thank the designers of this pinball machine.



Summary

Logic regarding ball lock and multilball progression is made per players individual merit.
Players never loose achevements from ball to ball.
Derandomisation of the multiball Mega-million (jackpot).
Derandomisation of the Snake run award.
Further game elements that was not even for all in multi-player games now equalised.
New Contest game adjustment.
Bug fixes. Points not being awarded. Multiball false start. Ball stock in lock lane. And more.



Improvements

Fully suitable for competition play.
No ball hangup in the lock lane requiring a power cycle.
Still suitable for arcade play via adjustment.
Many bug fixes for a perfected game that plays and awards points as expected.



Detailed changes description

Reference to the L-1 (and Europe L-2) revision.


RADICAL progress is never lost.
Lock made progress is player individual (no hard lock stealing). And never lost.
New status report page: RADICAL lights lock -> Lock lit -> RADICAL lights multiball -> Multiball lit.

On tilt, a locked ball is only ejected in the case of both balls ending up in the lock trough.
Lower drop target bank reset omitted from ball search.
Pops added to ball search.

Menu adjustment 50 changed from "Display AU01-04" to "Contest game". Options: "No" and "Yes". Default: "No".
When Contest game selected: The lock trough kicker is omitted from ball search.
When Contest game selected: The X ramp diverter is omitted from ball search.
When Contest game selected: Snake run awards follow a fixed sequence. Cross balls, player individual.
The Snake run sequence: Million, Vertical, Skate, Tail,  Million, Vertical, Skate, Tail,  Mystery, Mystery,... 
When Contest game selected: Snake run "next award" is indicated on the backbox translite.
When Contest game selected: The Snake run Mystery award is 100K.

The Mega-millions jackpot follows the fixed sequence of 4M, 6M, 8M, 10M, 10M,... Increment on collect. Player individual.

Ball tracking and handling are cleaned up.
No multiball false start.
No incorrect end-of-ball, when draining down to one ball-in-play.

A bug where Bust-a-move ramp shots would not register on fast combos, fixed.
A bug where Tail slide ramp shots would not always divert the ball, fixed.
Buggy X ramp diverter control with multiple up/down/up cycles on open, fixed.

Better postpond ball search handling when balls are held by the game.
A bug where Mega-million would go to last chance (timing out) on ball search, fixed.

A bug where the lower drop targets would stay down with no Spot letter option, fixed.
A buggy light show procedure related to the lower drop target bank, removed.

Tail slider start level is harmonised at level 2 for all players.
A bug where Tail slider mode would carry half baked to next player, fixed.
Tail slider exceeding level 15 no longer freeze the ball in the lock.
A bug where Tail slider would start on last "A" achieved as Spot letter on the ramp, fixed.

Messy logic regarding RADICAL progress and RADICAL shots indicators are cleaned up.
A bug where on tilt, the game would not shut down lights and music, fixed.

A bug where the kickback could be unlit but active by mistake in multi-player games, fixed.



Note

Lock made status sustains through a ball removed from the lock by opponents or a tilt.
Soft lock stealing only. Relock necessary, but opponents will never benefit a players achievements.

If Skate-or-die is lit, a Skate-or-die at the Snake run will award the Mystery instead.
The buggy diverter control would occationally make a diverted Tail slide ramp shot register as a Bust-a-move ramp shot.
The fixed diverter control allows plunging the ball to lock/start multiball, when lit, at start-of-ball.

Tail slider mode is lit on (radicAl) "A" collected. Re-lit on a spinner shot and at start-of-ball. Mode lit does not time out.
Once the mode is started, the Tail slider indicator runs on a 12 seconds timeout. Reset on a Tail slider collected.

The European ROM defaults to the hard pre-set. The mod, based on the US ROM, defaults to the medium pre-set. The medium pre-set is recommended.
Spot RADICAL on inlanes (adjustment 32) stops when the score exceeds 4M.



Sound board software

To be installed with sound board software rev. L-1.



Legal

Copyright 1990, 2020 Williams Electronics Games Inc. & Planetary Pinball Supply Inc. All Rights Reserved.

The software is provided as-is, without warranty of any kind, express or implied, including but not limited to the warranties of merchantability,
fitness for a particular purpose and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability,
whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.

       Game Version L-1 
U26 :    Checksum: B212
U27 :    Checksum: 785B
Weight N/A
System 11 Roms

CPU Rom Set v3.0 [U26, U27], CPU Rom Set vL-1 [U26, U27]

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