Author Topic: Downgrade Possibility?  (Read 3356 times)

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Offline njaddison

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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.
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Offline calc84maniac

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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?)
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Offline DJ Omnimaga

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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
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Re: Downgrade Possibility?
« Reply #3 on: December 10, 2011, 01:07:30 am »
I think it's possible via serial port as well.

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