If anyone still wants it, I've coded a timer with start/stop/reset and hrs:min:sec for Ndless users.

Edit: fixed a little bug that when you reseted parts of the old time remained on the display

I'll give a quick overview how to downgrade from >3.0 os's:

3.01 - If you use TNOC, you will be able to downgrade by just installing an older OS
3.02, 3.1.0 : You need to use TNOC before you upgrade, but when you downgrade you will need to use downgradefix.

TNOC removes the boot2 from the upgrade file, so the system stays with the old boot2 and doesn't get the new protection.
downgradefix exploits a hole in the old boot2 (so this only works if you used TNOC) and trashes the OS. You will be able to install an older OS after this.

TNOC: http://tiplanet.org/forum/archives_voir.php?id=1922&play=
DowngradeFix: http://tiplanet.org/forum/archives_voir.php?id=3584&play=

It doesn't work for me either. I can't seem to find a copy of it anywhere.

btw my friend showed me a shortcut to delete the OS on nspire .... it was RESET -> ON+ENTER+P+CLEAR -> then u get to a screen where it displays DELETE OS ...
can u guys tell me pls?

EDIT: i just found it : the shortcut was HOME+P+ENTER+ON
        Have someone the Downgradefix for the TI-nspire? :O

Is someone working on TNOC for 3.1?

Ok, I contacted critor and he fixed the link for downgradefix.
Please note that it ONLY works if you used TNOC.

Quote from: C3N on October 19, 2011, 11:14:32 am

is there a chance to downgrade from os 3.1 if i already installed os 3.1 without TNOC ?

It's either very hard (you'd need to connect using RS232 and do some other stuff) or impossible, sadly.

You can do if through rs232 (Critor tested this IIRC)

Well if you did not follow the downgrade warnings before installing OS 3.1, then you might be screwed. Sadly this happened to a lot of people because when someone buys a TI-Nspire he doesn't automatically visits TI-Planet to read about warnings of the sort. The only way migth definitively be a RS232 interface.