* WalrusIRC

You need to have 5 posts and not be part of restricted usergroups in order to use the WalrusIRC embedded shoutbox. However, you can also access our IRC channel called #CodeWalrus via EFnet.

Author Topic: Nspire OS 3.9.1 can now be downgraded (already) :D  (Read 5662 times)

0 Members and 1 Guest are viewing this topic.

Offline xlibman

  • Omni founder & CW co-founder
  • Super User
  • Original 5
  • CodeWalrus Supporter
  • *
  • Join Date: Nov 2014
  • Location: Quebec, Canada
  • Posts: 18909
  • Post Rating Ratio: +100/-5
    • dj_omnimaga
    • DJOmnimaga.music
    • @DJOmnimaga
    • dj_omnimaga
    • @DJOmnimaga
    • /u/DJ_Omnimaga
    • DJOmnimaga
    • 112/11286
    • @djomnimaga
    • @DJOmnimaga
    • DJ Omnimaga music store
  • Gender: Male
Nspire OS 3.9.1 can now be downgraded (already) :D
« on: December 28, 2014, 12:14:26 pm »
See original post on TI-Planet: http://tiplanet.org/forum/viewtopic.php?f=43&t=15780&lang=en

Looks like this one downgrade didn't took as long to come out. I suspect there wasn't much changes in the OS or TI didn't try much harder to find a new way to block downgrades. :D

However, no CAS nor Clickpad/Touchpad support yet: Just regular TI-Nspire CX. But yeah, basically if you were stuck on OS 3.9.1 (which isn't even available on TI servers yet, but is starting to appear on new calcs), then you can now go back to 3.6 and use Ndless! :)

You can download the utility here: DowngradeFix 3.9

And read the tutorial here: http://tiplanet.org/forum/viewtopic.php?f=57&t=15497&p=172096#p172096


  • Calculators owned: TI-57, 73, TI-80 (broken), TI-81, TI-82, TI-83, TI-83+ (broken), TI-83+ (broken), TI-83+SE (broken), TI-84+, TI-84+CSE, TI-84+CE, TI-85, TI-86, TI-89T, TI-92, TI-Nspire, TI-Nspire CX (semi-broken), HP 39gII, HP Prime, Casio fx-7000G, fx-7400G+, fx-7700GE, fx-9750G+, fx-9750GII, fx-9860G, cfx-9850G, FX-1.0+, fx-CG10, fx-CP400
  • Consoles, mobile devices and vintage computers owned: Samsung i5510, Nexus 5, Atari 2600, Lynx, SMS, Game Gear, Genesis, Dreamcast, NES, SNES, N64, GCN, Wii, Wii U, GBA, DS, 3DS, PS2, PS3, PS4, PSP, PSVita, XBox 360, XBOne

Bandcamp|Reverbnation|Facebook|Youtube|Twitter
Retired Omnimaga admin (2001-11) and editor (2012-14)

Offline Streetwalrus

  • Professional slacker
  • Super User
  • Original 5
  • Join Date: Nov 2014
  • Location: Israel
  • Posts: 2903
  • Post Rating Ratio: +20/-0
  • ƎW∀⅁ ƎH⊥
  • Gender: Male
Re: Nspire OS 3.9.1 can now be downgraded (already) :D
« Reply #1 on: December 29, 2014, 09:19:09 pm »
Well the os was built a while ago, long before ti planet released the downgrade utility. :)
  • Calculators owned: TI-80, HP 40G, TI-84 Plus rev G (yay 128k RAM), TI-83 Plus Silver Edition (broken LCD), TI-82 Stats.fr (black), TI-Nspire CX rev C (yay Nlaunchy), TI-83+ SE ViewScreen



Offline xlibman

  • Omni founder & CW co-founder
  • Super User
  • Original 5
  • CodeWalrus Supporter
  • *
  • Join Date: Nov 2014
  • Location: Quebec, Canada
  • Posts: 18909
  • Post Rating Ratio: +100/-5
    • dj_omnimaga
    • DJOmnimaga.music
    • @DJOmnimaga
    • dj_omnimaga
    • @DJOmnimaga
    • /u/DJ_Omnimaga
    • DJOmnimaga
    • 112/11286
    • @djomnimaga
    • @DJOmnimaga
    • DJ Omnimaga music store
  • Gender: Male
Re: Nspire OS 3.9.1 can now be downgraded (already) :D
« Reply #2 on: December 29, 2014, 11:11:13 pm »
True, but the timespan between its release and the downgrade utility seemed much shorter than with OS 3.9 and others to me. Maybe TI-Planet just found a new exploit that TI just can't figure out?

Also being able to downgrade this easily means that the team doesn't need to invest as much time into Ndless 3.9 or 3.9.1, as people can simply downgrade to 3.1 or 3.6 if they want to use it.
  • Calculators owned: TI-57, 73, TI-80 (broken), TI-81, TI-82, TI-83, TI-83+ (broken), TI-83+ (broken), TI-83+SE (broken), TI-84+, TI-84+CSE, TI-84+CE, TI-85, TI-86, TI-89T, TI-92, TI-Nspire, TI-Nspire CX (semi-broken), HP 39gII, HP Prime, Casio fx-7000G, fx-7400G+, fx-7700GE, fx-9750G+, fx-9750GII, fx-9860G, cfx-9850G, FX-1.0+, fx-CG10, fx-CP400
  • Consoles, mobile devices and vintage computers owned: Samsung i5510, Nexus 5, Atari 2600, Lynx, SMS, Game Gear, Genesis, Dreamcast, NES, SNES, N64, GCN, Wii, Wii U, GBA, DS, 3DS, PS2, PS3, PS4, PSP, PSVita, XBox 360, XBOne

Bandcamp|Reverbnation|Facebook|Youtube|Twitter
Retired Omnimaga admin (2001-11) and editor (2012-14)

Offline aeTIos

  • Dabbler in C
  • Super User
  • Original 5
  • Join Date: Nov 2014
  • Location: Ede, NL
  • Posts: 1049
  • Post Rating Ratio: +12/-0
  • hi
    • r_vdijk
    • /u/aetios
    • aetios
  • Gender: Male
Re: Nspire OS 3.9.1 can now be downgraded (already) :D
« Reply #3 on: December 30, 2014, 09:15:19 am »
That's really quick. Suck it, TI :D
ceci n'est pas une signature

Offline Duke "Tape" Eiyeron

  • Urist McEiyolobster
  • Super User
  • Join Date: Nov 2014
  • Location: (V)(-_(//));(V)
  • Posts: 1636
  • Post Rating Ratio: +11/-2
  • Fanciest Walrus of the oceans.
    • @@Eiyeron
    • Eiyeron
    • /u/Eiyeron
    • Eiyeron
    • Rétro-Actif : Rétro/Prog/Blog
  • Gender: Male
Re: Nspire OS 3.9.1 can now be downgraded (already) :D
« Reply #4 on: December 30, 2014, 12:56:53 pm »
What about the self destruction sequence? Is there any news about such a routine?
  • Calculators owned: A lot.

Offline xlibman

  • Omni founder & CW co-founder
  • Super User
  • Original 5
  • CodeWalrus Supporter
  • *
  • Join Date: Nov 2014
  • Location: Quebec, Canada
  • Posts: 18909
  • Post Rating Ratio: +100/-5
    • dj_omnimaga
    • DJOmnimaga.music
    • @DJOmnimaga
    • dj_omnimaga
    • @DJOmnimaga
    • /u/DJ_Omnimaga
    • DJOmnimaga
    • 112/11286
    • @djomnimaga
    • @DJOmnimaga
    • DJ Omnimaga music store
  • Gender: Male
Re: Nspire OS 3.9.1 can now be downgraded (already) :D
« Reply #5 on: December 30, 2014, 04:41:00 pm »
Not yet. Critor tried to trigger it in various ways, to no avail.
  • Calculators owned: TI-57, 73, TI-80 (broken), TI-81, TI-82, TI-83, TI-83+ (broken), TI-83+ (broken), TI-83+SE (broken), TI-84+, TI-84+CSE, TI-84+CE, TI-85, TI-86, TI-89T, TI-92, TI-Nspire, TI-Nspire CX (semi-broken), HP 39gII, HP Prime, Casio fx-7000G, fx-7400G+, fx-7700GE, fx-9750G+, fx-9750GII, fx-9860G, cfx-9850G, FX-1.0+, fx-CG10, fx-CP400
  • Consoles, mobile devices and vintage computers owned: Samsung i5510, Nexus 5, Atari 2600, Lynx, SMS, Game Gear, Genesis, Dreamcast, NES, SNES, N64, GCN, Wii, Wii U, GBA, DS, 3DS, PS2, PS3, PS4, PSP, PSVita, XBox 360, XBOne

Bandcamp|Reverbnation|Facebook|Youtube|Twitter
Retired Omnimaga admin (2001-11) and editor (2012-14)

Offline Streetwalrus

  • Professional slacker
  • Super User
  • Original 5
  • Join Date: Nov 2014
  • Location: Israel
  • Posts: 2903
  • Post Rating Ratio: +20/-0
  • ƎW∀⅁ ƎH⊥
  • Gender: Male
Re: Nspire OS 3.9.1 can now be downgraded (already) :D
« Reply #6 on: December 30, 2014, 08:16:14 pm »
True, but the timespan between its release and the downgrade utility seemed much shorter than with OS 3.9 and others to me. Maybe TI-Planet just found a new exploit that TI just can't figure out?
Nope. It just means that the exploit was completely unknown when the OS was built so chances that TI fixed it in there are small. They probably just had to adapt some things in the downgrade utility to make it compatible (ie, code offsets and such).
« Last Edit: December 30, 2014, 08:17:45 pm by Streetwalrus »
  • Calculators owned: TI-80, HP 40G, TI-84 Plus rev G (yay 128k RAM), TI-83 Plus Silver Edition (broken LCD), TI-82 Stats.fr (black), TI-Nspire CX rev C (yay Nlaunchy), TI-83+ SE ViewScreen



Offline xlibman

  • Omni founder & CW co-founder
  • Super User
  • Original 5
  • CodeWalrus Supporter
  • *
  • Join Date: Nov 2014
  • Location: Quebec, Canada
  • Posts: 18909
  • Post Rating Ratio: +100/-5
    • dj_omnimaga
    • DJOmnimaga.music
    • @DJOmnimaga
    • dj_omnimaga
    • @DJOmnimaga
    • /u/DJ_Omnimaga
    • DJOmnimaga
    • 112/11286
    • @djomnimaga
    • @DJOmnimaga
    • DJ Omnimaga music store
  • Gender: Male
Re: Nspire OS 3.9.1 can now be downgraded (already) :D
« Reply #7 on: December 30, 2014, 11:52:25 pm »
It's possible as well, although TI is normally quick on the lockdown trigger. I guess we'll see with OS 3.10.0 (I doubt they'll call it 4.0 because people will confuse the 84+CSE OS)
  • Calculators owned: TI-57, 73, TI-80 (broken), TI-81, TI-82, TI-83, TI-83+ (broken), TI-83+ (broken), TI-83+SE (broken), TI-84+, TI-84+CSE, TI-84+CE, TI-85, TI-86, TI-89T, TI-92, TI-Nspire, TI-Nspire CX (semi-broken), HP 39gII, HP Prime, Casio fx-7000G, fx-7400G+, fx-7700GE, fx-9750G+, fx-9750GII, fx-9860G, cfx-9850G, FX-1.0+, fx-CG10, fx-CP400
  • Consoles, mobile devices and vintage computers owned: Samsung i5510, Nexus 5, Atari 2600, Lynx, SMS, Game Gear, Genesis, Dreamcast, NES, SNES, N64, GCN, Wii, Wii U, GBA, DS, 3DS, PS2, PS3, PS4, PSP, PSVita, XBox 360, XBOne

Bandcamp|Reverbnation|Facebook|Youtube|Twitter
Retired Omnimaga admin (2001-11) and editor (2012-14)

 


You can also use the following HTML or bulletin board code to share it on your page or forum signature!


Also do not forget to check our affiliates below.
Planet Casio TI-Planet Calc.news BroniesQC BosaikNet Velocity Games