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[calcs] Guys... do NOT upgrade to OS 3.9.1 if you find it or get asked to!

Started by DJ Omnimaga, November 20, 2014, 03:02:33 am

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DJ Omnimaga

Apparently, according to TI-Planet news, Nspire OS 3.9.1 is now a thing and the downgrade utility doesn't work in it. It's unknown if it can be modified to work with 3.9.1 since this OS appears so soon after the downgrade utility came out (unless TI has like 6000 employees working on fixing exploits 24/7 allowing such fast release timeframe), but I just thought I would let you know so you won't accidentally put Pokespire, nReuben or other Nspire projects into jeopardy.

The OS is not out yet, though, but IIRC it's pre-loaded on new calcs. Just go to TI-Planet news for more info (I didn't link directly since CodeWalrus URL will appear in their traffic stats if people click the link) EDIT Jan 1st: http://tiplanet.org/forum/viewtopic.php?t=15592&p=173079 (now that CW is public)

aeTIos

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Streetwalrus

Quote from: aeTIos on November 20, 2014, 06:42:47 am
3.1.0.392 still rocks ass out of all other OSes.

This exactly.

According to the TI-Planet news, it may be older than the downgrade fix. If that's the case then they probably didn't patch the exploit in it but there's still a bit of work to port it over.

DJ Omnimaga

Indeed. Maybe they actually found the exploit before the community, though, we never know. But yeah even if it's not fixed someone still needs to make the program compatible anyway and if they noticed the program then perhaps an OS 3.9.2 is about to be rolled out anyway.

But yeah I still use OS 3.1 too. It's slow for some interesting Lua games but it does the job, especially space-wise.

Streetwalrus

Wait, do you actually manage to fill the CX ? *.* I thought you needed a s***load of GBA ROMs for that.

That aside, I don't really play lua games (actually I hardly ever play Nspire games as I find most of them mildly interesting and I have two much more powerful mobile devices for emulation), so I'm perfectly fine with 3.1, which is actually much faster to transfer programs, and that helps a lot when doing Ndless development.

DJ Omnimaga

Not yet, but I have a s***load of stuff on mine. :P It takes several secondds to open the documents menu after a reboot. I used to have even more stuff, though, because I had plenty of ROMs.


As for Lua games I find that the recent ones are not that slow on OS 3.1 because I tried Lime Rick and Dino Puzzle and they're somewhat responsive per LUa standards. Chaos is extremely smooth, so I don't see any reason to switch to 3.6. Besides, I don't think you can even install a CAS OS 3.6 on a non-CAS model.

Streetwalrus

You can install 3.6 on a non CAS calc. What you can't do is nlaunch a CAS os on a non CAS calc.

DJ Omnimaga

Oh right, it's nLaunch. My bad.

Btw will 3.9.1 fit on grayscale models? :trollface:


Duke "Tape" Eiyeron

Actually I put all my Roms in an hidden folder to avoid that low lag. My CX took each time 30 seconds to lshow everything and that's a big PITA.

DJ Omnimaga

Oh I should probably try to do that. I didn't realize that moving them elsewhere would reduce lag. I thought it was more like the VAT system on Z80 calcs.

Duke "Tape" Eiyeron

I don't remember which tool I used but I remember that it doesn't like big files. Beware with some of your ROMs, they'llvhave chances to be scrapped during the transfer.

DJ Omnimaga

There is something suspicious that has been found in Boot2 3.9.1.34. See this post by Critor for more explanation: http://tiplanet.org/forum/viewtopic.php?f=43&t=15768&start=10#p174633

Basically, there is a char string in it that reads "Security Breach: Self Destruction Sequence has begun.".  He and others are worried about this, because this message would imply that if a security breach occurs, then Boot2 or the OS either self-destructs or it just outright bricks the calculator. O.O

Since this would be illegal in some countries, I doubt TI would have done that, and the following post, where Critor performed some tests, cannot bring it up http://tiplanet.org/forum/viewtopic.php?f=43&t=15768&start=20#p174755 . However, with everything that TI did in the last 6 years or so (including the signed key controversy), we never know.

Streetwalrus

Hmm yeah, I'm definitely bothered by this and if it turns out to be anything, I'm dropping the Nspire for good. We've had enough.

aeTIos

Inb4 TI devs are trolling us :trollface:
But if this is real, that's quite concerning. On the other hand TI would lose any lawsuit against them if this actually permabricks calcs.
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