Omnimaga
Calculator Community => TI Calculators => Topic started by: donbirdy on September 09, 2014, 08:17:02 am
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Greetings all,
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.
Does anyone know how I can go about doing this?
Any help would be greatly appreciated.
Many Thanks!
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Since it's a B (2011) hardware revision, it isn't as restricted as hardware J and higher and it probably came with OS 3.0.1, so the previous owner probably upgraded it before selling it. I believe there is a way to downgrade from OS 3.9 on older models, but I think the minimum is OS 3.6, according to this post https://tiplanet.org/forum/viewtopic.php?f=15&t=15163&p=169442&hilit=downgrade+os+3.9#p169442 and I forgot how it is possible to downgrade from OS 3.9 to that OS, let alone a CAS OS.
Otherwise the other alternative is to use KhiCAS.
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Thanks for that DJ Omnimaga,
I am struggling to find some instructions that are in English for running KhiCAS (I have Googled extensively).
If anyone could point me in the right direction it would be greatly appreciated :D.
Many Thanks again,
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This might have english instructions http://tiplanet.org/forum/archives_voir.php?id=79135&lang=en , else there might be http://tiplanet.org/forum/viewtopic.php?p=166225&lang=en
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Thanks for all your help.
I have soldered up a TTL connection, does anyone know where I can find the 3.6 ROM I have looked everywhere!
I will probably need to re-flash the boot2 loader in order to get the 3.6 OS to work? Is this lurking around anywhere.
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It is worth noting:
Boot1 Code Version: 3.0.0.99
Boot2 Code Version: 3.2.4.7
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TI-Planet download section has links to external OS files including 3.6.
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Thanks DJ,
I have now successfully downgraded the boot2 image!
The current version I'm using is 3.10.16.
However, when I attempt to install OS 3.6 I get this error with "TI-Nspire Computer Link Software"
"You cannot install a version of the OS that is older than the currently installed version."
I'm not sure how the software knows what the current version of the old software was but is there away around it?
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Bump
:w00t: :w00t: :w00t: :w00t: :w00t: :w00t: :w00t: :w00t: :w00t: :w00t: :w00t:
Any ideas?
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Can anyone think of a way around this?
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A big shout out to the guys on IRC channel #ti on EFNet.
See below:
Use nLaunchy
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Thanks DJ,
I have now successfully downgraded the boot2 image!
The current version I'm using is 3.10.16.
However, when I attempt to install OS 3.6 I get this error with "TI-Nspire Computer Link Software"
"You cannot install a version of the OS that is older than the currently installed version."
I'm not sure how the software knows what the current version of the old software was but is there away around it?
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
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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).
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Yeah from what I remember, CAS on non-CAS didn't work except with OS 3.1, although I wasn't sure anymore. Nspire support tend to be sparse on Omni nowadays for some reasons, but I guess TI doesn't help much by alienating the TI-Nspire fanbase with lockdowns that requires dangerous manipulations to circumvent for inexperienced users.
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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.
Thanks for everyone's help.
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Good job getting it installed! Glad you got an old HW revision so you could downgrade it. It must suck to be stuck on 3.9 and never getting to run any of the awesome ndless programs.
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Thnk god this is still up Hi my name is knux03
Situation i have a P-0911D TI-nspire cx
how can i downgrade from 3.9? a friend of mine :banghead:
updated it by mistake and ended up having 3.9 :mad:
so i was wondering what do I have to do? :w00t:
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In such case you would need to use the RS232-TTL adapter method. The extra hardware has to be purchased online. Unfortunately there are currently no tutorial to downgrade from 3.9 yet (they're all for 3.6 it seems) so you would have to search through recent forum topics in this section or someone might have to help if they are still around.
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Thnk god this is still up Hi my name is knux03
Situation i have a P-0911D TI-nspire cx
how can i downgrade from 3.9? a friend of mine :banghead:
updated it by mistake and ended up having 3.9 :mad:
so i was wondering what do I have to do? :w00t:
Hi knux03.
I can provide some direction on this.
You will need to purchase one of these:
http://www.amazon.co.uk/FT232RL-Serial-Adapter-Module-Arduino/dp/B00HSX3GT4/ref=sr_1_11?ie=UTF8&qid=1411466718&sr=8-11&keywords=FT232 (http://www.amazon.co.uk/FT232RL-Serial-Adapter-Module-Arduino/dp/B00HSX3GT4/ref=sr_1_11?ie=UTF8&qid=1411466718&sr=8-11&keywords=FT232)
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And solder up accordingly:
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Hi! I'm new and I have googled a lot, and in need of some help.
I have a CX with the final letter C and I want to install CAS on the calculator.
When I bought it from a friend, it had software version 3.9... I have managed to downgrade it to 3.1.0.392, using the information available here in the forum. I'm currently unable to intall the CAS software on the device.
I understand that in order to be able to install the CAS softvare version I have to flash the boot2. (Currently I have Boot1=3.0.99 and Boot2=3.24.7)
I will get an USB-TTL adapter soon but I haven't found information on the bersion of boot2 I should use and also some manual on how exactly to flash the device (programs/steps/etc).
Can anyone help, I would really appreciate it!
Heiki
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Hi Heiki, welcome to the forums! You will need to use Nlaunch to install the CAS software. You don't need to flash the boot2, I think. If I'm mistaken, someone please correct me.
on a side note could the above post be moved to its own thread and the image 2 posts up be downscaled? :|
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I tried to use Nlaunch, the calc will not accept the file. I'm pretty sure the boot2 needs to be flashed. If I'm wrong, I'm very happy :)
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You can flash boot2 3.1 (I believe) using nsNandMgr, available on ti-planet.
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Thank you!
I flashed the boot2 using nsNandMgr and I'm now running CX CAS 3.1.0.392 on the CX calc :)
Boot2 version 3.10.16.
Do we have any approved updates or should I stick to this OS version now?
I'm a happy camper now, thank you again :)
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If you care both about Lua programs and Ndless, you can install a switching pack (see this a a sort of dual boot) on your calc.
3.1 CAS / 3.2 CAS
3.1 CAS / 3.6 non CAS
This because 3.2 and 3.6 add some features to Lua but 3.2 doesn't support Ndless and 3.6 CAS isn't possible with nlaunch.
If you only care about Lua, you can just put the 3.2 CAS on your calc.
If you only care about Ndless, you can stay as you are with just the 3.1 CAS on your calc.
If you only care about the CAS and not about Ndless nor Lua, same, you're fine with the 3.1 or you can upgrade to 3.2 CAS.
And if you cared about Lua and Ndless but not the CAS, you could have put just the 3.6 non CAS but that's probably out of question.