(Topic ID: 253119)

How to Disable Extra Balls on Stern Stingray?


By ekthoren

11 days ago



Topic Stats

  • 12 posts
  • 6 Pinsiders participating
  • Latest reply 1 day ago by Quench
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#1 11 days ago

I'm trying to disable extra balls on Stern Stingray. You can put it in novelty mode but it doesn't disable the extra balls and you can make the specials worth 100,000. Anyone know how to disable extra balls on this game?

#2 11 days ago

There is no way to disable Extra Ball as designed. It's going to require a ROM modification. You will need access to an EPROM programmer to go down this route.

#3 11 days ago
Quoted from Quench:

There is no way to disable Extra Ball as designed. It's going to require a ROM modification. You will need access to an EPROM programmer to go down this route.

Which means there's no way to disable it on Stern Pinball either, since it's the same rom. You want to tackle this one?

I guess no tournaments really use either title as this is the first time it's come up? Any other early mpu100 sterns that have this issue? (I already know about Dragonfist's)

#4 11 days ago
Quoted from slochar:

Any other early mpu100 sterns that have this issue?

Had a quick look, it's only Pinball / Stingray that doesn't have an Extra Ball disable dipswitch.

Quoted from slochar:

You want to tackle this one?

I presume your plate is full, but if you want this easy one go ahead otherwise I'll find time in a day or so and tie the option to one of the many unused dipswitches.

#5 11 days ago

This game was at Pinburgh and I put up some good games and don't recall getting an extra ball, so I'd assume that they found a way to disable extra balls.

#6 11 days ago

Quench
I have an eprom programmer so if you can modify the ROM that would be awesome!
Thank you

#7 11 days ago

If you’re going to make it worth points instead of extra ball I would only go 10K or 25K since it’s fairly easy to collect

#8 11 days ago

I never seem to collect the EB on mine. There might be a setting to have it change lanes or be on both lanes? I would have to check but that sounds familiar.
Mine switches lanes and it seems like the ball always goes in the opposite one.

#9 10 days ago

Yes there is a setting to have it switch lanes or both lanes be lit. But no setting to either disable it or give extra points instead of extra ball when collecting it.

#10 10 days ago
Quoted from ekthoren:

Yes there is a setting to have it switch lanes or both lanes be lit. But no setting to either disable it or give extra points instead of extra ball when collecting it.

Do the lanes do anything else useful? How crazy of an idea would it be to just disable the switches?

Either way...I'm super excited to see this one added to Titletown! Stingray was my first game...wish I would have kept it. Will be great to revisit it, and I'm sure yours will look and play way better than mine did!

#11 10 days ago

My plan was to disable the inlane switches if no ROM update was available. The only thing they do is always give you 5k points and extra ball if lit.

1 week later
#12 1 day ago

I'm not sure if you'll like this approach but I wanted to keep it in the spirit of the other early Sterns. Let me know if you don't like it.

DIP switch 26 Off disables the Saucers extra ball feature.
DIP switch 26 On enables the Saucers extra ball feature.

When it's set to off, the Saucer now lights the "5,000" score instead of "Lites Extra Ball lane".
Other DIP switch game options of awarding extra balls instead of credits are unchanged. Same as other Sterns.

There is some unused code in this game that points to feature lamps which are not wired - I haven't investigated what they were meant to be.

Open the U2 ROM in a HEX editor and change the following:

Offset, original byte, new byte
$063: $E1 ---> $7F
$280: $11 ---> $1E
$281: $CB ---> $34

Open the U6 ROM in a HEX editor and change the following:
$4E4: $12 ---> $1B
$634: $00 ---> $D6
$635: $00 ---> $50
$636: $00 ---> $C5
$637: $00 ---> $02
$638: $00 ---> $26
$639: $00 ---> $09
$63A: $00 ---> $CE
$63B: $00 ---> $1E
$63C: $00 ---> $4A
$63D: $00 ---> $08
$63E: $00 ---> $4A
$63F: $00 ---> $26
$640: $00 ---> $FC
$641: $00 ---> $A6
$643: $00 ---> $97
$644: $00 ---> $1B
$645: $00 ---> $CE
$646: $00 ---> $85
$647: $00 ---> $08
$648: $00 ---> $7E
$649: $00 ---> $11
$64A: $00 ---> $CB
$64B: $00 ---> $01
$64C: $00 ---> $02
$64D: $00 ---> $05
$64E: $00 ---> $03
$64F: $00 ---> $05

Save and burn replacement 2716 EPROMs.

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