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Author Topic: TI-Nspire OS 4.3 out (blocks Ndless and downgrades, but not nBoot nor ControlX?)  (Read 5536 times)

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https://tiplanet.org/forum/viewtopic.php?f=15&t=18874

Apparently someone got his hands on OS 4.3 for the TI-Nspire in China and apparently, it features more powerful TI-BASIC linking commands to interact with other devices connected to the TI-Nspire. They were tested with the TI-Innovator and apparently worked.

Now the next question, though, is did they patch the exploits used by nBoot and Ndless?

UPDATE (08/02/16): Although this OS blocks Ndless, it seems like it doesn't block nBoot+ControlX. Critor had no issue launching them from the new Boot2 4.3, as demonstrated at https://tiplanet.org/forum/viewtopic.php?f=43&t=18877&p=206173#p206172

He also demonstrated how installing OS 4.3 on a calculator that already had nBoot+ControlX installed will not prevent you from downgrading back to OS 4.2. The Ndless installer currently doesn't work on OS 4.3, so downgrading will be necessary for the time being. Also note that the exploit used by nBoot was patched in hardware revision W.
« Last Edit: August 18, 2016, 05:12:32 pm by DJ Omnimaga »


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Re: TI-Nspire OS 4.3 out?
« Reply #1 on: August 02, 2016, 07:23:13 pm »
Now the next question, though, is did they patch the exploits used by nBoot and Ndless?

The exploit used by nBoot can't be patched, it's in the hardware (boot1). It is fixed in HW-W though.
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Re: TI-Nspire OS 4.3 out?
« Reply #2 on: August 02, 2016, 10:42:29 pm »
Ah I didn't know W didn't support nBoot. But thanks for the info.
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Re: TI-Nspire OS 4.3 out?
« Reply #3 on: August 03, 2016, 07:13:55 am »
Important:

I updated the first post with more information from @critor : https://tiplanet.org/forum/viewtopic.php?f=43&t=18877&p=206173#p206172

Basically, although this OS blocks Ndless and downgrades, it doesn't block nBoot+ControlX, so if you installed the latter two prior upgrading, then you can downgrade at will (which will be needed to install Ndless for the time being).
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OS 4.3.0.702 is now out:
TI-Nspire CX CAS https://education.ti.com/en/us/software/details/en/0607F21D07B14ACB9EE85E57A9C30EDA/ti-nspirecxcas_os
TI-Nspire CX https://education.ti.com/en/us/software/details/en/0607F21D07B14ACB9EE85E57A9C30EDA/ti-nspirecxcas_os

No official changelog so far (but it blocks Ndless and downgrades, as usual, so don't upgrade if you still want to use Ndless. I assume that older hardware with nBoot and ControlX can downgrade, though, right?). The main additions are an exam mode for the Netherlands and TI-Innovator commands for TI-BASIC

Source https://tiplanet.org/forum/viewtopic.php?f=43&t=18919
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Offline critor

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Yes. If you install nBoot + ControlX before updating to 4.3, then you can still downgrade whenever you want and much more... ;)

A clean english nBoot + ControlX installation tutorial with download links is now available :
https://tiplanet.org/forum/viewtopic.php?t=18920&p=206415#p206415
« Last Edit: August 19, 2016, 12:08:18 am by critor »

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I assume that nBoot + ControlX still requires hardware V or lower, though? Hopefully enough students managed to get an old enough hardware revision for this school year.

Thanks for the tutorial by the way. :)
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Yes, hardware A to V.

I did test with an emulated hardware W calculator - it just doesn't work (normal boot).

I didn't test with a real hardware W calculator (we don't know... it might brick things... the emulator is not perfectly reliable).

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I've translated the tutorial in French ; just change the language of the website in the upper-right corner.
https://tiplanet.org/forum/viewtopic.php?t=18920&p=206423#p206423
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Also, there has since been seen a revision X :P
But my guess is that it's a minor update of W.

We won't know for sure (well, even then...) until we get our hand on one, take a photo, and compare with W :P
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I wonder if the revision that comes after Z will be AA or greek letters? Also I wonder if any previous calc ever saw that many hardware revisions before?
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Well the 84+ uses AA, AB, AC... but the 83+ have restarted to A, for instance (also, different factories over time), so, we'll see.
I lean towards AA, AB, AC...
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I didn't know the 84+ went this high. I thought they were around revision R or S at most. As for the 83+ I was sure revisions stopped years ago. (at least on North American models)
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Rev. R was made by factory P between around April 2011 and December 2013 (yep, it lasted quite a while, at least from information I have - we'd need people to share their datecodes to get better accuracy :P).
However, in the same time, there have been other factories and revs, from S (Jan 2011 factory K and Mar. 2012 factory P) to Z (factory K)
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Darn, that's a lot. Even by 2011 I thought they were around M or so. I guess I forgot how long ago the missing RAM pages were discovered (2009 when people noticed TI-Boy SE and some Omnicalc functions stopped working on newer models)
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