Omnimaga

Calculator Community => Other Calc-Related Projects and Ideas => Topic started by: njaddison on December 09, 2011, 10:52:40 pm

Title: Downgrade Possibility?
Post by: njaddison 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.

Title: Re: Downgrade Possibility?
Post by: calc84maniac 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?)

Title: Re: Downgrade Possibility?
Post by: DJ Omnimaga 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

Title: Re: Downgrade Possibility?
Post by: Juju on December 10, 2011, 01:07:30 am

I think it's possible via serial port as well.