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Has anybody taken a look on NuTone musical door chimes? They were basically the ancestors of modern IoT craze (combining features of melody doorbell, digital striking clock with alarms and such things) and based on classic microcontrollers those certainly can be dumped and emulated.

NuTone Electronic Door Chimes
https://www.youtube.com/playlist?list=PLsTvqKsBnGYcS7_jKaTBCo7fg8QpCQlSW

http://northsideforyourhome.squares...dytime-electronic-chime-model-lbc55.html

Vintage NUTONE Musical Door Chime LB-55 26 Melodies Tunes Bell

An Overview of the NuTone LBC55 Musical Chime and Challenges of Repairing it

Troubleshooting and Repairing a NuTone LA52 Harmony Musical Chime

I don't own one, but in USA they have a big fanbase with repair companies selling expensive spare parts, so they are undoubtedly an important piece of microchip history worth to be preserved.


MAY THE SOFTWARE BE WITH YOU!

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Well I finally took pics of the VFDs and pinned out that last batch of handheld games. I dumped the micros too but I don't have any way to test if the dumps are good. There's one to go, and I haven't dumped it yet since I need to use one of the adapters for the QFPs on it, and I don't want to remove the chips from them until the dumps are tested good. The last chip is a shrink dip package, so I will have to wire it in with 30-some wires to dump it and I only want to do that once. This is the first time I have encountered the sdip package for these. If I find any others I should probably make adapters.

I took a bunch of VFD pics of each game at different exposure levels, so hopefully that will help with vectoring them.

http://blog.kevtris.org/blogfiles/Handhelds/VFD%20Games/Bombman/
http://blog.kevtris.org/blogfiles/Handhelds/VFD%20Games/Gakken%20Defender/
http://blog.kevtris.org/blogfiles/Handhelds/VFD%20Games/Kampf%20Der%20Monster/
http://blog.kevtris.org/blogfiles/Handhelds/VFD%20Games/Kiteyo%20Parman/
http://blog.kevtris.org/blogfiles/Handhelds/VFD%20Games/Operation%20Z/
http://blog.kevtris.org/blogfiles/Handhelds/VFD%20Games/Pucki%20and%20Monsters/
http://blog.kevtris.org/blogfiles/Handhelds/VFD%20Games/Toukon%20Jyuohmaru/

Toukon Jyuohmaru had a bad VFD but I still managed to get pictures of it lit and pin it out. Some of the filament wires are broken. It looks like one of the grids is bent up slightly inside and it caused it to touch at some point. This isn't the first time I have seen that.

Defender has the SDIP part so it isn't dumped yet, but I did all the VFD pictures and pinned it out in preparation.

Once the dumps are verified I can stick all these back together and return them.

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Give me a minute or two...hundred.
I'll check if the dumps are good.

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Nice kevtris smile


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I dumped the final microcontroller. I had no adapter for the shrink dip version (and haven't encountered any until now) so if I hit some more at some point, I will make an adapter. Until then, I did... this thing.

[Linked Image from cdn.discordapp.com]

[Linked Image from cdn.discordapp.com]

That's it in the chip dumper.

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The games were added to MAME.
!!users note!!: Not playable yet.

They all appear to be work within the constraints (aka the missing gfx). So, they make jingles and sound effects, and react to inputs. 99% certain that the dumps are be good.

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Here is Scrabble Lexor

[Linked Image from i.imgur.com]

It's a simple scrabble game and scorekeeper, does not have a word library in the ROM.
The interesting thing is that this is on a Fujitsu MB8841, first time I've seen a handheld/tabletop using this. The MCU was already emulated in MAME. Sean figured out how to dump it.

This might also mean good news on the arcade side soon, it's possible to dump MB8841 protection MCUs now.

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These 4 handhelds are only $50 (linklink).

Anyway, I might be looking in the wrong driver, but these look unemulated. Does anyone here already own them for dumping?

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Yeah, sean has them listed. Those are all pretty common. I don't think there's been work on Tiger standalones in awhile?

Last edited by D_G; 05/11/22 02:47 AM.
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The X-Men one is already in MAME ("txmenpx"), but I don't think the other three are.

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