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Author Topic: New TI-84 Pocket adds anti-downgrade protection against 2.53MP and lower -  (Read 3281 times) Bookmark and Share
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apcalc
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« on: 15 June, 2011, 01:02:27 »
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Much like they did with the Nspire CX, Texas Instruments has taken the liberty of sending TI-BANK and critor a test of the TI-84 Pocket:

A short summary of the new calc is posted in the original thread:

Quote
TI sent me a brand new TI-84 Pocket.fr.

Check the photos, tests and informations on TI-Bank:
http://ti.bank.free.fr/index.php?mod=news&ac=commentaires&id=1176

To be short:
- as expected, it's similar with the basic TI-84+
- no miracle: only 48Kb RAM like all recent TI-84+

You might have been right with the 2.71MP OS.
The calculator includes a new 1.03 Boot Code. Remember that on TI-z80 Flash, the Boot Code only deals with the OS installation...
So probably some bad news very soon...

Quote
With the new 1.03 Boot Code on the new TI-84 Pocket.fr (and probably soon on the newest TI-84+/84+SE):
- you cannot downgrade to any TI OS below 2.55MP
- you cannot install third party OSes anymore
- you cannot even install a patched 2.55MP OS
- the OS validation screen alone needs 6-7 minutes in the best case (no, it's not frozen)

It seems as if the new Boot Code 1.03 is a disastrous addition to the calculator.  Much like with OS 2.1, the boot code blocks downgrading and third party Operating Systems on the TI-84.  With the exception of the MP Operating Systems (which technically could be considered an "update"), TI has done little against the 84 community, making most of their attacks against the Nspire.  This marks a new age, with a direct attack against TI-84 developers.  The loss of ability to install any OS makes it impossible for users to downgrade to the more stable OS 2.43 and to install custom OSes, such as KnightOS.

Although this boot code can only be confirmed to exist on the TI-84 Pocket, it is possible that it will find its way on newly produced TI-84s, bringing disastrous results to the 84 development community.

OS 2.71 MP is not April Fools any more!



More information, good and bad, will be added here when available.
« Last Edit: 15 June, 2011, 05:28:14 by DJ_O » Logged

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« Reply #1 on: 15 June, 2011, 02:25:42 »
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Quote from: apcalc on 15 June, 2011, 01:02:27
It seems like the new boot code is a quite negative addition to the OS; at this point, tests performed by critor seem to indicate that downgrading is blocked! Sad

Bah, really sucks, especially with all those problems that the MP OSes have brought us. It has OS 2.55MP, right?
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« Reply #2 on: 15 June, 2011, 02:30:14 »
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Quote from: Deep Thought on 15 June, 2011, 02:25:42
Quote from: apcalc on 15 June, 2011, 01:02:27
It seems like the new boot code is a quite negative addition to the OS; at this point, tests performed by critor seem to indicate that downgrading is blocked! Sad

Bah, really sucks, especially with all those problems that the MP OSes have brought us. It has OS 2.55MP, right?

Yes, it has OS 2.55 MP. Sad
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« Reply #3 on: 15 June, 2011, 02:34:28 »
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Well, at least they didn't "upgrade" it into something unthinkable.
« Last Edit: 15 June, 2011, 02:34:55 by Deep Thought » Logged



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« Reply #4 on: 15 June, 2011, 04:14:17 »
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With the new 1.03 Boot Code on the new TI-84 Pocket.fr (and probably soon on the newest TI-84+/84+SE):
- you cannot downgrade to any TI OS below 2.55MP
- you cannot install third party OSes anymore
- you cannot even install a patched 2.55MP OS
- the OS validation screen alone needs 6-7 minutes in the best case (no, it's not frozen)

I've just released the info in a "non-agressive" way:
http://ti.bank.free.fr/index.php?mod=news&ac=commentaires&id=1177


But you are free to report things "differently" Wink
« Last Edit: 15 June, 2011, 04:24:07 by critor » Logged
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« Reply #5 on: 15 June, 2011, 04:33:56 »
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What the hell.

1. Can you install 2.71MP?
2. You can't downgrade the Boot Code right?

Seems TI isn't as open as in the past anymore.
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« Reply #6 on: 15 June, 2011, 04:40:31 »
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Quote from: juju2143 on 15 June, 2011, 04:33:56
What the hell.

1. Can you install 2.71MP?

2.71MP was a patched 2.55MP if I remember well. So it cannot be installed with the new 1.03 Boot Code.



Quote from: juju2143 on 15 June, 2011, 04:33:56
2. You can't downgrade the Boot Code right?

I suppose it is possible, but we'll have to go through several hardware hacks/mods, and it will be much harder than plugging a RS232 device on a TI-Nspire.

But on the other side, TI cannot upgrade your Boot Code either.
« Last Edit: 15 June, 2011, 04:41:21 by critor » Logged
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« Reply #7 on: 15 June, 2011, 04:59:36 »
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Darn this sucks, but are we sure there's no way to downgrade or install patched OSes?

-Are the RSA keys any different or something? Also does it blocks downgrades back to 2.55MP, should a new OS come out?
-Does the 2.55MP included still includes third-party apps compatibility and the Asm()/AsmComp()/Asmprgm commands?
-Does Output() runs at the same speed as on other calcs? Huh?
-Is it possible to install patches after installing the OS, such as Zstart? Or will the OS give an error on boot once it's modified?

I hope I did not give them ideas... shocked
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« Reply #8 on: 15 June, 2011, 05:00:18 »
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Can 2.55 from a normal 84 be sent to the Pocket?
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« Reply #9 on: 15 June, 2011, 05:04:09 »
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Quote from: Darl181 on 15 June, 2011, 05:00:18
Can 2.55 from a normal 84 be sent to the Pocket?

Yes. Smiley
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« Reply #10 on: 15 June, 2011, 05:10:41 »
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Is it still running at 15Mhz?  Is the graphics card better?  How is the screen?
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« Reply #11 on: 15 June, 2011, 05:11:18 »
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I'm pretty sure there's no graphics card in the pocket...
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« Reply #12 on: 15 June, 2011, 05:12:13 »
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I wonder if those screen flipping tricks still work, and if it needs ALCDFIX. Or if it got worse.
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« Reply #13 on: 15 June, 2011, 05:21:20 »
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Quote from: DJ_O on 15 June, 2011, 04:59:36
Darn this sucks,

Well, well, well, TI is back to their same old tricks.  They throw us a bone called Lua, and every body breathes a sigh of relief.  Was that premature?  I think so.  Surely their intentions are to put those unwanted goodies on all new 84's, what then? 
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« Reply #14 on: 15 June, 2011, 05:24:09 »
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Can we get a dump of this supposed code?
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