« previous next »
Pages: [1]   Go Down

Author Topic: Installing 3.1 on Ti - nspire cx CAS  (Read 12033 times)

0 Members and 1 Guest are viewing this topic.

Offline mlowery2

  • LV0 Newcomer (Next: 5)
  • Posts: 3
  • Rating: +0/-0
    • View Profile
Installing 3.1 on Ti - nspire cx CAS
« on: August 26, 2013, 07:11:58 pm »
I was on 3.2 but then i deleted my os. My calc is currently on the INSTALL OS NOW loading screen. I have the 3.1.tcc file i need but when ever i try and install it, the student CAS software says that i can't install an OS that is older than the current one.
Logged

Offline critor

  • Editor
  • LV11 Super Veteran (Next: 3000)
  • ***********
  • Posts: 2079
  • Rating: +439/-13
    • View Profile
    • TI-Planet
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #1 on: August 26, 2013, 07:56:39 pm »
Hi!

Your calculator did probably come preloaded with OS 3.2.4 and Boot2 3.2.4.

Can you please give us the datestamp of the calculator?
The datestamp is a 7-characters code written on the back at the right of the serial number.

^ Here it's P-0411A for exemple, meaning the calculator was manufactured in the P-factory (China) in april 2011 and does include the hardware revision A of the motherboard.
Logged
+1/-0 karm for this message
TI-Planet co-admin.

Offline mlowery2

  • LV0 Newcomer (Next: 5)
  • Posts: 3
  • Rating: +0/-0
    • View Profile
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #2 on: August 26, 2013, 08:21:37 pm »
The code on mine is P-0313J
Logged

Offline SkylarTheFox

  • LV0 Newcomer (Next: 5)
  • Posts: 1
  • Rating: +0/-0
    • View Profile
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #3 on: August 26, 2013, 08:49:06 pm »
Quote from: mlowery2 on August 26, 2013, 08:21:37 pm
The code on mine is P-0313J
As of right now there is no known method to downgrade J model nSpires.
Logged

Offline Hooloovoo

  • LV5 Advanced (Next: 300)
  • *****
  • Posts: 225
  • Rating: +22/-0
    • View Profile
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #4 on: August 26, 2013, 09:42:11 pm »
For now, to get an OS on it, you can download the correct one from http://education.ti.com/nspire/os324. There may be an exploit found which takes care of this downgrading issue, but for now, a calculator with an OS is better than one without.
Logged
+1/-0 karm for this message
"My world is Black & White. But if I blink fast enough, I see it in Grayscale." -tr1p1ea
Spoiler For some of the calcs I own:



(actually I have quite a few more than this, but I don't feel like making bars for them all.)

Offline Adriweb

  • Editor
  • LV10 31337 u53r (Next: 2000)
  • **********
  • Posts: 1708
  • Rating: +229/-17
    • View Profile
    • TI-Planet.org
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #5 on: August 26, 2013, 10:55:05 pm »
Quote from: fortytwo on August 26, 2013, 09:42:11 pm
For now, to get an OS on it, you can download the correct one from http://education.ti.com/nspire/os324. There may be an exploit found which takes care of this downgrading issue, but for now, a calculator with an OS is better than one without.
So far, no exploit AFAIK, though...

Getting our hands on such a machine would be helpful for anyone if we (well, the people who do know how, at least :P) end up finding what's changed and especially how to reverse/counter that.

I wonder if trading (exchanging) a machine with someone who has it, for a non-J one would be OK ?
The less distance between people, the better, though, since international costs are not so negligible
« Last Edit: August 26, 2013, 10:57:28 pm by adriweb »
Logged
My calculator programs
TI-Planet.org co-admin.
TI-Nspire Lua programming : Tutorials  |  API Documentation

Offline DJ Omnimaga

  • Clacualters are teh gr33t
  • CoT Emeritus
  • LV15 Omnimagician (Next: --)
  • *
  • Posts: 55943
  • Rating: +3154/-232
  • CodeWalrus founder & retired Omnimaga founder
    • View Profile
    • Dream of Omnimaga Music
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #6 on: August 26, 2013, 11:04:46 pm »
Yeah the best from now on is to buy used models on Ebay/Amazon while still avoiding getting scammed, but first, ask the seller if the serial number is like that. I think calcs from A to I are fine. However they might come with OS 3.2.4 or higher, which is still kinda problematic.
Logged

Offline mlowery2

  • LV0 Newcomer (Next: 5)
  • Posts: 3
  • Rating: +0/-0
    • View Profile
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #7 on: August 27, 2013, 07:32:49 am »
oh....
Logged

Offline critor

  • Editor
  • LV11 Super Veteran (Next: 3000)
  • ***********
  • Posts: 2079
  • Rating: +439/-13
    • View Profile
    • TI-Planet
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #8 on: August 27, 2013, 07:42:27 am »
Yes, you said it...
Logged
TI-Planet co-admin.

Offline Vandervell

  • LV0 Newcomer (Next: 5)
  • Posts: 3
  • Rating: +0/-0
    • View Profile
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #9 on: September 18, 2013, 02:15:58 pm »
Hello,

Why is it impossible to remove the bone 3.2 by formatting the memory of the calculator (like when you uninstall windows) to install version 3.1 (as if you installed Windows XP instead of Windows 7)?

Regards

Vandervell
Logged

Offline ElementCoder

  • LV7 Elite (Next: 700)
  • *******
  • Posts: 611
  • Rating: +42/-2
    • View Profile
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #10 on: September 18, 2013, 02:18:17 pm »
The protection is stored/located in an area of memory that isn't erased when formatting the calculator IIRC, therefore you can't get around it.
Logged

Some people need a high five in the face... with a chair.
~EC

Offline Vandervell

  • LV0 Newcomer (Next: 5)
  • Posts: 3
  • Rating: +0/-0
    • View Profile
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #11 on: September 18, 2013, 02:28:20 pm »
Ok thank you,

Have you any idea how long it will take for us to downgrade the bone?

Regards

Vandervell
Logged

Offline critor

  • Editor
  • LV11 Super Veteran (Next: 3000)
  • ***********
  • Posts: 2079
  • Rating: +439/-13
    • View Profile
    • TI-Planet
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #12 on: September 19, 2013, 06:59:07 am »
OS 3.1 was released in september 2011, and Ndless 3.1 came out 4 months later in january 2012.

But at that time TI was much less serious about security and there were much more active people in the development team... It may take longer this time...

And the next OS 3.6 which should be released in the next weeks may bring even stronger protections... It may take much longer this time...
« Last Edit: September 19, 2013, 07:00:00 am by critor »
Logged
TI-Planet co-admin.

Offline Vandervell

  • LV0 Newcomer (Next: 5)
  • Posts: 3
  • Rating: +0/-0
    • View Profile
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #13 on: September 19, 2013, 09:40:30 am »
thank you for the information
Logged

Offline DJ Omnimaga

  • Clacualters are teh gr33t
  • CoT Emeritus
  • LV15 Omnimagician (Next: --)
  • *
  • Posts: 55943
  • Rating: +3154/-232
  • CodeWalrus founder & retired Omnimaga founder
    • View Profile
    • Dream of Omnimaga Music
Re: Installing 3.1 on Ti - nspire cx CAS
« Reply #14 on: October 09, 2013, 12:17:45 am »
Quote from: critor on September 19, 2013, 06:59:07 am
OS 3.1 was released in september 2011, and Ndless 3.1 came out 4 months later in january 2012.

But at that time TI was much less serious about security and there were much more active people in the development team... It may take longer this time...

And the next OS 3.6 which should be released in the next weeks may bring even stronger protections... It may take much longer this time...

On the other hand, Ndless 3.1 came out much longer after OS 3.0.1 came out. The previous version was for OS 1.7, 2.0.1 and 2.1. So basically, after OS 3.0.1 came out, it actually took 10 months before we see a new Ndless build. That said, with OS 1.1 it took nearly three years.
Logged
Pages: [1]   Go Up
« previous next »