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Author Topic: New TI-84 Pocket adds anti-downgrade protection against 2.53MP and lower -  (Read 3280 times) Bookmark and Share
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Deep Thought
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« Reply #45 on: 16 June, 2011, 01:54:29 »
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Was just gonna point that out, but then I realized that it's not only that. The TI-83 Plus Silver Edition didn't work with OS 1.12 and below, for instance, but on that one TI didn't take the time and block all third-party OSes with some new form of protection.
« Last Edit: 16 June, 2011, 01:54:37 by Deep Thought » Logged



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« Reply #46 on: 16 June, 2011, 05:04:50 »
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My guess for this is that they're checking for a new signature, or if the MD5 equals something known.

The new signature probably isn't loaded from the cert anymore, either, they learned their lesson on that one.

If you can patch after install, though, it'd be rather trivial to put a new OS in there. Do the standard unlock tricks still work?
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« Reply #47 on: 16 June, 2011, 05:09:14 »
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Quote from: ACagliano on 16 June, 2011, 01:27:51
Let me play devils advocate. What if the anti-downgrade protection is there because the hardware is designed in a way that would make any earlier OS incompatible or unstable?

Although it *is* possible, it doesn't seem likely.
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« Reply #48 on: 16 June, 2011, 05:12:12 »
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they're not going to redesign an architecture that's well over a decade old just to block a small group of hackers.
« Last Edit: 16 June, 2011, 20:27:19 by Netham45 » Logged
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« Reply #49 on: 16 June, 2011, 06:36:15 »
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Yeah true, unless they were really determined to prevent ASM programs to run on newer models/hardware or something.
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« Reply #50 on: 16 June, 2011, 08:22:38 »
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Quote from: critor on 15 June, 2011, 23:00:52
Do you want me to try some specific games?
Have you tried running a program that modifies the OS on-calc? If you haven't, I think it would be helpful to see if that still works, or if the flash unlock exploits are blocked.
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« Reply #51 on: 16 June, 2011, 09:32:53 »
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IIRC, BrandonW has stated that TI cannot fix the universal flash unlock exploit without removing the ability to send variables directly to the archive.
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« Reply #52 on: 16 June, 2011, 19:06:10 »
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that's crap. they did something good (and thats not positive for us)
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« Reply #53 on: 23 June, 2011, 22:59:10 »
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Have a first look into the new TI-84 Pocket.fr! Wink
http://ti.bank.free.fr/index.php?mod=news&ac=commentaires&id=1208
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« Reply #54 on: 24 June, 2011, 13:48:03 »
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Quote from: critor on 23 June, 2011, 22:59:10
Have a first look into the new TI-84 Pocket.fr! Wink
http://ti.bank.free.fr/index.php?mod=news&ac=commentaires&id=1208

I really like the fact that it's small Smiley
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