Author Topic: Downgrade Possibility?  (Read 3667 times)

0 Members and 1 Guest are viewing this topic.

Offline njaddison

  • LV4 Regular (Next: 200)
  • ****
  • Posts: 176
  • Rating: +24/-27
    • View Profile
Downgrade Possibility?
« on: December 09, 2011, 10:52:40 pm »
Nspire student software has to have the ability to read the os of the ti-nspire. There are four ways that we might just be able to get past this ability (tell me if I am wrong):
1. Trick nspire student software into "fake-reading" the os of your nspire, allowing you to downgrade it.
2. Create a program that scans for downgrade protection in a ti-nspire os image, and removes it.
3. Create a new linking program that allows you to downgrade your nspire.
4. Downgrade ti-nspire student software.

Numbers 3 and 4 are most likely to be possible, whereas 1 and 2 may seem slightly.. er... dumb.
<a href="http://www.nerdtests.com/ft_nt2.php">
<img src="http://www.nerdtests.com/images/badge/nt2/5f42ec78e054645d.png" alt="NerdTests.com says I'm a Highly Dorky Nerd God.  Click here to take the Nerd Test, get geeky images and jokes, and talk to others on the nerd forum!">
</a>


Offline calc84maniac

  • eZ80 Guru
  • Coder Of Tomorrow
  • LV11 Super Veteran (Next: 3000)
  • ***********
  • Posts: 2912
  • Rating: +471/-17
    • View Profile
    • TI-Boy CE
Re: Downgrade Possibility?
« Reply #1 on: December 09, 2011, 10:54:36 pm »
None of the above. The minimum OS version is stored in the Nspire's flash memory, and it never gets reset. The only way is to write an Ndless program to change it (and if you have Ndless, why would you even want to downgrade?)
"Most people ask, 'What does a thing do?' Hackers ask, 'What can I make it do?'" - Pablos Holman

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: Downgrade Possibility?
« Reply #2 on: December 09, 2011, 11:56:34 pm »
Maybe he wants more memory left? I know for instance that there's a considerable size difference between OS 1.1 and 2.1 :P

Offline Juju

  • Incredibly sexy mare
  • Coder Of Tomorrow
  • LV13 Extreme Addict (Next: 9001)
  • *************
  • Posts: 5730
  • Rating: +500/-19
  • Weird programmer
    • View Profile
    • juju2143's shed
Re: Downgrade Possibility?
« Reply #3 on: December 10, 2011, 01:07:30 am »
I think it's possible via serial port as well.

Remember the day the walrus started to fly...

I finally cleared my sig after 4 years you're happy now?
THEGAME
This signature is ridiculously large you've been warned.

The cute mare that used to be in my avatar is Yuki Kagayaki, you can follow her on Facebook and Tumblr.