Author Topic: [Howto] Downgrading TI-Nspire 3.0, the hard-way  (Read 9321 times)

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Offline critor

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[Howto] Downgrading TI-Nspire 3.0, the hard-way
« on: May 01, 2011, 09:28:56 pm »
I've been asked for information several times here.


So if you've installed the 3.0 Nspire OS with the 3.0 Boot2, here's my step by step how-to in order to remove the 3.0 Boot2 using a TTL<->USB adapter and then downgrade your OS.
http://ti.bank.free.fr/index.php?mod=archives&ac=voir&id=3503 (in french)

You've got lots of photos, schematics, logs, captures and links.


Feel free to report any error.

If someone wants to translate/adapt in english, just ask me for the editable file through PM.

Offline DJ Omnimaga

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Re: [Howto] Downgrading TI-Nspire 3.0, the hard-way
« Reply #1 on: May 02, 2011, 02:25:20 pm »
Nice tutorial critor! HOpefully someone can translate it in english for the non-visual people. Hopefully the pictures should help a lot, though.

Offline C3N

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Re: [Howto] Downgrading TI-Nspire 3.0, the hard-way
« Reply #2 on: May 02, 2011, 04:17:34 pm »
thx a lot...
my friend has searched sth. like this =)

Offline critor

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Re: [Howto] Downgrading TI-Nspire 3.0, the hard-way
« Reply #3 on: May 04, 2011, 01:09:27 pm »
Here is a 2nd tutorial I've made in order to repair TI-Nspire calculators bricked by the 3.0.1 OS.
http://ti.bank.free.fr/index.php?mod=archives&ac=voir&id=3507 (french)

The required hardware is the same, but the actions are not in the same order and a little different too.
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Offline DJ Omnimaga

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Re: [Howto] Downgrading TI-Nspire 3.0, the hard-way
« Reply #4 on: May 26, 2011, 02:12:38 am »
Cool, thanks for this. SHould be useful in case someone installs OS 3.0.1 but forgets about the bug.


Offline Proger10

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Re: [Howto] Downgrading TI-Nspire 3.0, the hard-way
« Reply #5 on: September 02, 2011, 11:50:13 am »
I have installed OS3 and now I want to install OS2. My french so bad. But I understand that I should:
1. Install OS3 without boot2
2. Install old version of boot2 via UART.
3. Install OS I want via USB(TI Computer Link)
(Am I right?)
I have done 1 and 2, but I cant install OS2 because "You cant install OS older then installed now". At this moment I have TI Nspire CAS with:
1. boot1 version: 1.4.8916.
2. boot2 version: 1.4.1571
3. OS version: 3.0.2.1791

What do I should do to install OS 2.x?
PS Sorry for my english.

Offline calc84maniac

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Re: [Howto] Downgrading TI-Nspire 3.0, the hard-way
« Reply #6 on: September 02, 2011, 11:58:35 am »
Here, try DowngradeFix
"Most people ask, 'What does a thing do?' Hackers ask, 'What can I make it do?'" - Pablos Holman

Offline Proger10

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Re: [Howto] Downgrading TI-Nspire 3.0, the hard-way
« Reply #7 on: September 02, 2011, 12:42:55 pm »
Thanks a lot! It have helped me.