(Topic ID: 225496)

Stern Electronics Club (1977-1984).

By Mitch

3 years ago


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  • 319 Pinsiders participating
  • Latest reply 18 hours ago by Pinball_Nate
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NVRAM and Bug Fix ROMs (resized).jpg
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There are 5683 posts in this topic. You are on page 114 of 114.
#5651 11 days ago
Quoted from barakandl:

update the ROM to a bug fixed version or get the RAM clear software from my website MPU info, bottom of the page. the "divide by ten" version is probably built around the bugged meteor software. Back in 2018 did not fully understand the bug yet and was still stuffing bugged meteor ROM on boards.
The bugged meteor version does not sanitize a section of RAM used for the sound board at start up. A few other games like Ali and Nine Ball have similar RAM issues, but eventually those two games are able to fix themselves (9 ball after end of a ball, Ali end of game). Background sound in 9 ball is weird until one ball is finished. The "bell" noise in Ali gets odd sounding.

Thanks, so glad for your help - I will definitely do that.....may get the bug fixed ROM - I assume the chips are socketed in and can be easily removed?.......

I don't see the ROM offered on your site, are you selling these?

Thanks again, Nate

#5652 11 days ago
Quoted from Pinball_Nate:

I am using the original skirt

Mine was new replacement so the age of the part is not 100% reason you are having problems.

#5653 11 days ago
Quoted from barakandl:

"divide by ten" version is probably built around the bugged meteor software.

For the record, It is, yes.

#5654 10 days ago
Quoted from barakandl:

the "divide by ten" version is probably built around the bugged meteor software.

Depends on which version. One thing for sure, all the Oliver ones have the endless countdown bug. The .6x/.7x branches do not, but neither of those are /10 versions. I could kick out a /10 version based on the .6x branch (6 digit displays) relatively easily. I will be going into my codebase for Meteor in the near future as finally thanks to CoreyStup I know enough to transplant sounds, so I'll finally have the sound effect I want for the additional sweep features. I will build a /10 version without all the features enabled so you can update it (since those versions also have the ram clear)

Also I want to update the spinner to record the high spins, and to work >100. Was playing this today and several people got close to 100, an average spin was 50-70. Most I've gotten was 94 IIRC so it's only a matter time until I really nail it.

A lot of the sb300 games seem to have issues with using leftover kruft in the ram - dragonfist does too, but you can't just clear it, you have to set it to the correct values. The game has a routine to do this after every ball... but doesn't do it at game start. Pretty stupid!

Coming soon..... lightning with spinner counter and no-ball relocking during multiball.

#5655 10 days ago
Quoted from slochar:

no-ball relocking during multiball.

I would make it part of an award during multi-ball...
1) no-ball relock multi-ball. = easy
2) complete "X" = "X" ball does not lock. = med to hard.

#5656 10 days ago
Quoted from vec-tor:

I would make it part of an award during multi-ball...
1) no-ball relock multi-ball. = easy
2) complete "X" = "X" ball does not lock. = med to hard.

So start multiball, if (presumably) I can get enough dip switches/memory locations free, set to easy, balls that drop back into the saucers just eject (this is what it does now in testing, assuming it works once it goes in machine).

Otherwise, the ball will relock unless you complete a PF advance X? Or the bonus multiplier X? Or, "X" as in generic unknown?

If I get some more memory free I'm thinking of letting the end user change the valhalla bonus time from 30 seconds to anything from 00 (off) to 99 (very liberal....) Setting it to 00 would take care of freeing up a dip as well that I can use for something else (like the multiball relock).

So if balls are back in the lock and you do X do they then release? I guess it wouldn't make sense otherwise.

#5657 10 days ago

I had a pinsider ask me to do a custom nylon pop ring like the classic nylon rings but with altered dimensions (outer ring dia) to replace his metal pop rings that were deformed which are NLA. This new proto parts 2A-141 and 1A-234 is just one part now.

https://www.shapeways.com/marketplace?q=swinkscsbumper&sort=newest

Coupled with the stern plastic base and the whole mech can be dropped out as a complete assembly.

710x528_35693343_18714166_1630928039_1_0 (resized).pngEarly Stern Thumper Rod & Ring (resized).pngearly stern pop assembly (resized).png
#5658 10 days ago

slochar
"X" as in generic unknown?
Answer: yes...
Like complete a 3bank = 1 ball does not lock.
Or have an "X" set of targets flashing... "X" = 1 through 10? spot targets...
complete the set of flashing targets = 1 ball does not lock.
I know a lot has to do with what is available, ram/rom...
I have been there... squeezing the bites to free up bites.

#5659 10 days ago
Quoted from slochar:

Coming soon..... lightning with spinner counter and no-ball relocking during multiball.

That no ball re-locking during multi-ball would be a nice upgrade for Catacomb.

#5660 10 days ago
Quoted from slochar:Coming soon..... lightning with spinner counter and no-ball relocking during multiball.

Is it possible to have it eject any locked balls at game over?

#5661 10 days ago
Quoted from cottonm4:

That no ball re-locking during multi-ball would be a nice upgrade for Catacomb.

I agree and will probably address that at some point. Hopefully as straightforward as Lightning and not as convoluted as flight 2000.

Quoted from LOTR_breath:

Is it possible to have it eject any locked balls at game over?

Yes but right now the game doesn't check for all balls before starting so that would have to be added.

#5662 10 days ago

On a side note:
What I find interesting is that Bally's early designing prototyping had three 6821 pia's.
What options one could have today; if the boards did use three, instead of two pia's.

#5663 9 days ago
Quoted from vec-tor:

On a side note:
What I find interesting is that Bally's early designing prototyping had three 6821 pia's.
What options one could have today; if the boards did use three, instead of two pia's.

I'd guess they weren't doing the PIA function sharing on the protos and someone hit on the idea that software costs nothing vs. increasing your PIA costs by 50%. (We all know that software development time is 'free', right? Like forcing Pfutz to code all that ball handling crap for flight 2000 instead of just putting 2 more switches in the walker, right??)

#5664 9 days ago
Quoted from vec-tor:

On a side note:
What I find interesting is that Bally's early designing prototyping had three 6821 pia's.
What options one could have today; if the boards did use three, instead of two pia's.

Bally's PIA are super busy. The multiplexing going on is really impressive compared to how WMS implemented (up to five PIAs). At U10 one PIA port may be doing three different things.

I am guessing the first prototype had each PIA port just doing one job instead of multiple. The engineering team figured out how to multiplex and cut the BOM down which is probably huge savings at the time once you start making games in the QTY bally was. So I would guess, not much extra could be done.

<3 Doug MacDonald and the Bally team that did the early SS hardware. They did such a good job Stern ripped it off and made their own awesome games with it.

#5665 8 days ago

Dumb question, but where do I purchase the "bug fixed" ROM for Meteor we have been discussing so I can see if my sound board is working ok? Barakandl was nice enough to ask and include the chip when I got the CPU board from him. It wouldn't have to be the "divide score by" type, I'm not that good to turn over the score yet...................

I have a six digit display..........

Thanks, Nate

#5666 8 days ago
Quoted from Pinball_Nate:

Dumb question, but where do I purchase the "bug fixed" ROM for Meteor we have been discussing so I can see if my sound board is working ok? Barakandl was nice enough to ask and include the chip when I got the CPU board from him. It wouldn't have to be the "divide score by" type, I'm not that good to turn over the score yet...................
I have a six digit display..........
Thanks, Nate

I don't know of anyone selling them, but you can download it from the IPDB and burn it yourself if you have the equipment:

https://www.ipdb.org/search.pl?any=meteor&search=Search+Database&searchtype=quick#1580

#5667 7 days ago
Quoted from Mathazar:

I don't know of anyone selling them, but you can download it from the IPDB and burn it yourself if you have the equipment:
https://www.ipdb.org/search.pl?any=meteor&search=Search+Database&searchtype=quick#1580

Sound fix is not in that ROM that one is the bonus bug fix only.

#5668 7 days ago
Quoted from slochar:

Sound fix is not in that ROM that one is the bonus bug fix only.

Thanx, that's good to know. Do you (or anyone) happen to know if that bonus-fixed ROM image on IPDB is the one required to allow the Pinitech NVRAM board work or do I need to join Pinball_Nate and figure out where to source the "sound fix" ROMs? I'm still in the cabinet repair phase of my Meteor restoration but I want to add the NVRAM board when I put this pin back together next month / early November.

NVRAM and Bug Fix ROMs (resized).jpg
#5669 7 days ago

I am the source of the nvram fix for the rom that I provided to Andrew it's available here:
http://tsqmadness.com/slochar/ZIP/meteora2(1).zip

This is the nvram sound fix applied to stern's factory 6 digit fix for the endless bonus bug. It clears the sound registers on bootup that were leftover from previous games' bootup.

I don't sell roms though I have just enough to do my software playtesting so you'll have to get them burned somewhere else.

#5670 7 days ago

I'm looking for a classic Stern wide body apron (any) if anyone can part with one.

#5671 7 days ago
Quoted from slochar:

I am the source of the nvram fix for the rom that I provided to Andrew it's available here:
http://tsqmadness.com/slochar/ZIP/meteora2(1).zip
This is the nvram sound fix applied to stern's factory 6 digit fix for the endless bonus bug. It clears the sound registers on bootup that were leftover from previous games' bootup.
I don't sell roms though I have just enough to do my software playtesting so you'll have to get them burned somewhere else.

Many thanks for providing the link!

#5672 7 days ago
Quoted from slochar:

I am the source of the nvram fix for the rom that I provided to Andrew it's available here:
http://tsqmadness.com/slochar/ZIP/meteora2(1).zip
This is the nvram sound fix applied to stern's factory 6 digit fix for the endless bonus bug. It clears the sound registers on bootup that were leftover from previous games' bootup.
I don't sell roms though I have just enough to do my software playtesting so you'll have to get them burned somewhere else.

I remember when I had a Galaxy game, it had the same kind of problem on boot-up.
It would keep the same tone constanly on at booting untill you play/start a game.
The game however would just keep on blinking the led untill fully booted.
I never got to fix this problem, but suspect the same kind of sound reset problem.
I used the nvram board from Andrew in this game.

Peter

#5673 7 days ago

My Cheetah is being a jerk.

When either flipper button is pressed the game goes into solenoid test mode during gameplay. It doesn’t reset, it actually goes straight into each solenoid firing one by one, weird. During the test it doesn’t start over or reset when the flippers activate, which is also odd. I swapped in a new solenoid board and no change, MPU is a weebly.

Any ideas where I should start looking?

#5674 7 days ago

start game disconnect coin door harness hit flippers.... still goes in, some other issue, but if it doesn't.... check the coin door carefully for shorts.

#5675 7 days ago
Quoted from slochar:

start game disconnect coin door harness hit flippers.... still goes in, some other issue, but if it doesn't.... check the coin door carefully for shorts.

You are a legend, that totally worked. And I see a burn mark on the service menu button so looks like I should start there. Thank you so much!

#5676 4 days ago

Okay, I will gladly pay someone to burn me a ROM, I do not have equipment to do so. PM me if you can help out.

Much appreciated in advance......

-Nate

#5677 4 days ago
Quoted from Pinball_Nate:

Okay, I will gladly pay someone to burn me a ROM, I do not have equipment to do so.

You want https://www.hobbyroms.com/ - Steph is awesome.

#5678 3 days ago

Thanks, I will go with them!! Appreciate it.

-Nate

#5679 2 days ago

Ok, I contacted hobbyroms, they asked me the following question:

You need to replace 2 eproms.

Rom 1 and Rom 6 if you have the 4 eprom configuration ( 4 x 2716 eproms)

or Rom 2 and Rom 6 if you have the 2 eprom configuration ( 2 x 2732 eproms)

I have an older Barakandl MPU so what does that require (2017 approx)?

Thanks.

#5680 2 days ago

Let's summon barakandl himself!

As far as I know, many free play roms/etc are already in Andrew's board, so generally burning new ROMs is not something that you need to do.

He can provide burning instructions. It would likely go into the 27512 expansion slot, and I'm not familiar how that would need to be programmed.

#5681 2 days ago
Quoted from semicolin:

Let's summon barakandl himself!
As far as I know, many free play roms/etc are already in Andrew's board, so generally burning new ROMs is not something that you need to do.
He can provide burning instructions. It would likely go into the 27512 expansion slot, and I'm not familiar how that would need to be programmed.

His older boards still took roms like originals.

#5682 1 day ago

If it is an older version you probably need either a single 2764 or two 2732s. The people selling ROMs on 2732s for the original MPU should also work fine on the replacement boards without the combo ROM. Just note the silk screen printing on the board about the where pin 1 is on the 2732 ROM as it has four less legs than the IC socket.

#5683 18 hours ago
Quoted from barakandl:

If it is an older version you probably need either a single 2764 or two 2732s. The people selling ROMs on 2732s for the original MPU should also work fine on the replacement boards without the combo ROM. Just note the silk screen printing on the board about the where pin 1 is on the 2732 ROM as it has four less legs than the IC socket.

Thanks, I have your replacement MPU dated April 2017 in the right hand corner..... so I guess order either the single 2764 or two 2732's correct? Andrew, I take it you do not have these optional chips for sale to correct the sound board issue?

Nate

Screenshot 2021-09-16 211404 (resized).jpg

There are 5683 posts in this topic. You are on page 114 of 114.

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