Situation i have a P-0911D TI-nspire cx how can i downgrade from 3.9? a friend of mine updated it by mistake and ended up having 3.9 so i was wondering what do I have to do?
I think you are running os 3.1. In that case, you can install ndless 3.1 instead of ndless 3.6, which is much more stable and doesn't need to be reinstalled. Then just follow the instructions to install KhiCas
He was not running OS 3.1, he came from 3.9 and downgraded to 3.6. And since he uses nlaunchy, Ndless doesn't need to be reinstalled.
However, if the goal is to have the CAS, it's true that it can be a good idea to install 3.1 (you can put a 3.1 CAS OS on a non-CAS CX but you can't with the 3.6).
Hi Hayleia,
I have now successfully downgraded to OS 3.1.
I am still in the process of learning what can be done with the TI-nspire CX. So far I have managed to play Doom haha.
Apologies if this is a noobish question however I've just recently purchased a TI-nspire CX and desperately need the Computer Algebra System Functionality.
I have purchased the calculator second hand (The last 7 digits of the serial number at the back of the calculator are: P-0511b.
The current software version on the device, (I presume stock) is Version 3.9.0.463 as defined under "Handheld Status".
After doing a little bit of research, it appears as if there is no hardware limitation for use of CAS features implemented in the TI-nspire CAS.
It is my understanding that the boot2 can be modified in order to unleash the CAS features on the CX device.
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