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Author Topic: Downgrade For Ti-nspire os 3.9 released  (Read 42778 times)

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Offline SpiroH

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #30 on: November 04, 2014, 09:59:19 am »
Quote from: DJ Omnimaga on November 03, 2014, 06:29:47 pm
On a side note, I am surprised that Texas Instruments didn't release a new OS yet since this downgrade fix exploit came out. Normally, it just takes 1 hour or less. <_<
Maybe their fix is not a real fix and they just want the ndless-publicity. I can't belive TI programmers are that dumb :P .
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Offline Streetwalrus

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #31 on: November 04, 2014, 10:56:58 am »
It's nice that it came out for new users, even though I won't need it since I have an Nlaunchable calc and I'm still running is 3.1 anyway. :P
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Offline Vogtinator

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #32 on: November 04, 2014, 10:59:47 am »
Quote
It's nice that it came out for new users, even though I won't need it since I have an Nlaunchable calc and I'm still running is 3.1 anyway. :P
Same here, I'm mostly still developing for 3.1. Mostly because 3.1 is much faster (especially file transfer in nspire_emu) and also to ensure backwards-compatibility. My calc runs on 3.6 for school reasons ("domain" function mainly)
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Offline DJ Omnimaga

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #33 on: November 04, 2014, 11:11:49 am »
Same, but I might switch to OS 3.6 + Nlaunchy soon because I'm getting a bit tired of how much slower Lua is in 3.1 and the fact most Lua developers no longer really want to support OS 3.1. It's just that when I do it I really want to have enough time and dedication to make sure I am doing it right.
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Offline Streetwalrus

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #34 on: November 04, 2014, 12:01:16 pm »
I don't run any lua on my calc and I don't use it for school so I prefer to use OS 3.1 since I can debug on-calc pretty fast. I just need to get myself an UART.
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Offline DJ Omnimaga

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #35 on: November 04, 2014, 12:03:18 pm »
What would be an UART? Also yeah one reason why I stay with OS 3.1 is how even without nLaunchy I still don't need to re-install Ndless every reboot. Saves a bit of time considering the Nspire startup is already long to begin with. OS size is also a factor :P
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Offline Vogtinator

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #36 on: November 04, 2014, 12:09:59 pm »
Quote
I don't run any lua on my calc and I don't use it for school so I prefer to use OS 3.1 since I can debug on-calc pretty fast. I just need to get myself an UART.
The "new" SDK has a feature to redirect stdout to the display with nspireio. It shouldn't conflict with other libs trying to access the display ;)
Quote
What would be an UART?

RS232 serial connection over CMOS levels in this case :P

Quote
Also yeah one reason why I stay with OS 3.1 is how even without nLaunchy I still don't need to re-install Ndless every reboot. Saves a bit of time considering the Nspire startup is already long to begin with. OS size is also a factor
The 2 MB or somewhat aren't really an issue and startup time is not an issue either. The solution is pretty easy: Just install nLaunch and you can use both.
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Offline Streetwalrus

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #37 on: November 04, 2014, 12:14:48 pm »
An UART is nothing else than a serial adapter. :P The thing you can use for reprogramming the boot2 but it also lets you communicate with the running program if it implements debug code.

Oh Vog ninja'd me.
And I didn't know about that. Does it work on OS 3.1 ? I don't want to upgrade because of all the reasons. :P
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Offline Vogtinator

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #38 on: November 04, 2014, 12:19:18 pm »
Quote from: Streetwalrus on November 04, 2014, 12:14:48 pm
Oh Vog ninja'd me.
And I didn't know about that. Does it work on OS 3.1 ? I don't want to upgrade because of all the reasons. :P
Yes, all programs compiled with the new sdk work on 3.1 as well if they don't use any incompatible features explicitly.
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Offline DJ Omnimaga

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #39 on: November 04, 2014, 12:31:09 pm »
Thanks for the clarification on the UART thing. So I assume it serves the same purpose as an Arduino and an RS232 interface when it comes to Nspire stuff?


Also for me 2 MB is a lot of space, especially with that many Lua games and GBC ROMs installed and startup time is an issue as well. The TI-84+CSE boots in 1 second, the HP Prime in 3 seconds and ClassPad II in 3 seconds, yet the Nspire sometimes takes 45 seconds to do so (if it starts at all, because in two occasions in the last few months it got stuck with the clock icon)


But yeah, the main good news is that we can finally easily get rid of OS 3.9, which makes me happy no matter what. :D
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Offline Jim Bauwens

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #40 on: November 04, 2014, 04:17:36 pm »
There is a huge process that needs to be followed before TI can release a new OS. They need to test, distribute and make sure that there aren't any big regressions in the new build (bad updates have bricked devices in the past, they don't really want that happening again).
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Offline Vogtinator

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #41 on: November 04, 2014, 04:19:58 pm »
Quote
There is a huge process that needs to be followed before TI can release a new OS. They need to test, distribute and make sure that there aren't any big regressions in the new build (bad updates have bricked devices in the past, they don't really want that happening again).
Yes, and you can see the (what I believe is) the build number. For 3.9.0.493 it's probably 493, so they did clearly have some work on building and testing...
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Offline iloveolives2

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #42 on: November 06, 2014, 12:54:18 pm »
Can somebody please help me? For some reason, my calculator does not want to register after I launch the downgrade program and the program says that downgrade protection is disabled. I keep resetting the calculator and the computer to no avail. I am using a Ti-nspire cx and ti-nspire computer link to downgrade from the computer.
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Offline DJ Omnimaga

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #43 on: November 07, 2014, 11:48:01 am »
Have you followed every instruction steps on the TI-Planet tutorial? SOmetimes, one step being missed is enough to either cause the whole process to fail or even permanently damaging the calculator.

Do you get any error message? Also what is the OS (including the last  digits) and hardware revision letter on the back of your calculator (in case it's a very new revision would have patched this exploit shortly before it came out)?
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Offline Vogtinator

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Re: Downgrade For Ti-nspire os 3.9 released
« Reply #44 on: November 07, 2014, 11:57:45 am »
Quote
Can somebody please help me? For some reason, my calculator does not want to register after I launch the downgrade program and the program says that downgrade protection is disabled. I keep resetting the calculator and the computer to no avail. I am using a Ti-nspire cx and ti-nspire computer link to downgrade from the computer.
That's a known problem, it happens sometimes (and some some cals more often than on others, weirdly) and the easiest way to cirumvent this is the following:
  • Run downgradefix
  • After the message is shown, hold Doc-Enter-EE and reset the calculator while still holding these keys.
  • When the menu shows up, uninstall the operating system and it will reboot.
  • On the next reboot you can now install 3.6.
At least in theory it should work, haven't tried it myself.

Quote
Also what is the OS (including the last  digits) and hardware revision letter on the back of your calculator (in case it's a very new revision would have patched this exploit shortly before it came out)?
There is no update yet, AFAIK.
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