Author Topic: The unseen TI-Nspire CAS+ operating system on TI-Bank  (Read 6438 times)

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Offline perennial

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The unseen TI-Nspire CAS+ operating system on TI-Bank
« on: July 28, 2011, 05:21:28 pm »
Hi, everyone. Here I have a TI-Nspire CAS+ that has the earlier OS that even TI-bank website doesn't have it. The CAS+ OS is:
Version: 1.0.554 2006-08-28
Boot1 Code Version: 1.0.526
Boot2 Code Version: 1.0.526

Can someone help me post instructions step by step(since I barely know nothing about programming)to get this OS out? I would gladly upload it onto the website for the community to analyze. Maybe a key exist there. I don't know. I would like to contribute to the programming development of the current TI-Nspire. I can upload the picture to verify.

Here is the link:
http://img.removedfromgame.com/imgs/IMG_0695.JPG

More:
http://img.removedfromgame.com/imgs/IMG_0702.JPG
http://img.removedfromgame.com/imgs/IMG_0701.JPG
http://img.removedfromgame.com/imgs/IMG_0700.JPG
http://img.removedfromgame.com/imgs/IMG_0699.JPG
http://img.removedfromgame.com/imgs/IMG_0698.JPG
http://img.removedfromgame.com/imgs/IMG_0697.JPG
http://img.removedfromgame.com/imgs/IMG_0696.JPG

Thank you. I hope to learn something and be some help to the community.

Let me know if there's anything else you need to know.
« Last Edit: July 28, 2011, 10:47:21 pm by perennial »

Offline DJ Omnimaga

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Re: The first TI-Nspire CAS+ operating system
« Reply #1 on: July 28, 2011, 05:24:20 pm »
Hi and welcome on the forums. I cannot help you but nice find. You cannot upload the OS here but I'm sure someone like Critor will like to have a copy via his e-mail if it's ever extractable.

You should upload pics of your calculator and the about screen, by the way, so we can see how it looks like :)
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Re: The first TI-Nspire CAS+ operating system
« Reply #2 on: July 28, 2011, 05:35:11 pm »
I think you need 50 posts to upload things, unfortunately. You can always use http://img.removedfromgame.com/ to upload pictures.

And welcome to Omnimaga!




Offline critor

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Re: The first TI-Nspire CAS+ operating system
« Reply #3 on: July 28, 2011, 07:55:48 pm »
Yes, TI-Bank does not have the 1.0.554 OS, as we've found no software way to dump CAS+ OSes up to now.
The only way I know of which might work would be by connecting the NAND ROM to an xD card reader.

So for now, if your CAS+ OS gets deleted/corrupted somehow, there is no way to reinstall it.

Your calculator must be this one:
http://ti.bank.free.fr/index.php?mod=galerie&action=img&id_gal=9&id_img=123

But it's not the oldest known OS. This calculator can also come with the rarer 1.0.529 OS.


Older OSes have been reported too, but they are allmost unfindable:

1.0.494:
http://ti.bank.free.fr/index.php?mod=galerie&action=img&id_gal=9&id_img=142

1.0.1.0.334T
http://ti.bank.free.fr/index.php?mod=galerie&action=img&id_gal=9&id_img=144
« Last Edit: July 28, 2011, 07:56:09 pm by critor »
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Offline DJ Omnimaga

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Re: The first TI-Nspire CAS+ operating system
« Reply #4 on: July 28, 2011, 08:15:17 pm »
I think you need 50 posts to upload things, unfortunately. You can always use http://img.removedfromgame.com/ to upload pictures.

And welcome to Omnimaga!
Actually it's 5 posts for forum uploads and 1 post for avatar/sig. For uploading games/programs in the dl section it was set to 40.
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Offline perennial

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Re: The unseen TI-Nspire CAS+ operating system on TI-Bank
« Reply #5 on: July 28, 2011, 10:50:54 pm »
is there no way to dump it even though the software ti-nspire connect recognize it beside manslaughter its organs? O.O. The Nspire software that I use is 1.0.59. The thing is that I send files to the calculator and back up from it. So why it couldn't tell the calculator to send the OS. When I click on one click back up a folder from the calculator which is hidden called "phx" is being sent to my "back up" folder on my computer. The size of the back up is "1 KB".
Let me know if anyone wants to get a copy of that back up "1KB" file.
The way I see is in that 1KB file there is a hidden file in there that was being sent from the operating system itself. Therefore, it can give a clue as to whether we can manipulate that code to cause that particular file to send it back to the OS calculator in the NAND chip and tell the NAND to spit out their secret. I know it is not gonna be easy. Perhaps I might get it all wrong. But for the heck of it, the sake of discovery is tempting all of the programmers. So, Please help me, community.
Would it help implementing the new programming languages easier to the current nspire series? Who knows. The past gives a path to the future as there is origin(key) in evolution(better language code).
One thing that I also notice is that the "send OS" is there in the menu. So why can't I select it? If there's a way to override that then it can be sent to the computer. We need to enable that. I don't think it is there just for show. What do I need to do to enable that feature?
Also, I think it might be the last line of vulnerable code or something that made them jump from this particular version 1.0 to 1.1.
« Last Edit: July 29, 2011, 12:56:44 am by perennial »

Offline ztrumpet

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Re: The unseen TI-Nspire CAS+ operating system on TI-Bank
« Reply #6 on: July 28, 2011, 11:51:54 pm »
Welcome here, perennial!  Thanks for your willingness to help us discover more. :)

Offline critor

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Re: The unseen TI-Nspire CAS+ operating system on TI-Bank
« Reply #7 on: July 29, 2011, 05:00:31 am »
The problem is that the CAS+ is using a virtual filesystem to communicate with the computer.
That virtual file system does not contain the OS (only your documents).


Here's another prototype by the way ;)
http://ti.bank.free.fr/index.php?mod=news&ac=commentaires&id=1112

I'm dreaming of putting my hands on it! ^^
« Last Edit: July 29, 2011, 08:05:25 am by critor »
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Offline Jim Bauwens

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Re: The unseen TI-Nspire CAS+ operating system on TI-Bank
« Reply #8 on: July 29, 2011, 01:00:57 pm »
perennial, in theory it should work, but no one ever tested it. Critor wanted to do it with his own nspire's, but hasn't got any chance yet. Also, we cannot be sure that it will not be harmed, as its hard to solder to the NAND chip.