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Author Topic: 1st try of hard-dumping the CAS+ -  (Read 1118 times) Bookmark and Share
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critor
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« on: 29 April, 2012, 02:20:23 »
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If you hold Home+Enter+P on a TI-Nspire CAS+, you don't get a maintenance menu, no... the calculator just does immediatly remove the OS without prompting! Tongue

As this prototype based on the TI-Phoenix 1 is totally incompatible with later Nspire models, and as Texas Instruments has never published a CAS+ OS installation file, your calculator is now permanently bricked.

Without Texas Instruments help, we could rebuild a compatible OS installation file if we managed to dump the NAND ROM.

There were many attemps using the TI-Nspire Computer Link, and all of them failed... So if we have no further similar idea, we have to try something else.



Jimbauwens is trying the thing another way. Following the idea suggested by mikehill2003, he has just tried the 1st hard-dumping of the TI-Nspire CAS+ with OS 1.0.554 I sent him.

The idea is to connect the NAND ROM to an xD card reader, as unlike other cards, xD cards are just raw NAND ROMs without any controller or interface.



Soldering those tiny pins was very hard and he even had to use a microscope!



But unfortunately, the computer stubornly states that there is no media in the xD reader.



Please cheer him up, as we might never be so close to dumping the CAS+ again...



Bigger photo available from the TI-Planet news:
http://tiplanet.org/forum/viewtopic.php?f=43&t=9179
« Last Edit: 29 April, 2012, 02:21:56 by critor » Logged
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« Reply #1 on: 29 April, 2012, 03:39:49 »
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wow, very nice
also what are all of the other conectors on the board for?
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« Reply #2 on: 29 April, 2012, 04:24:51 »
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A microscope. Wow.  shocked
That's amazing. Good effort.
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« Reply #3 on: 29 April, 2012, 08:17:45 »
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Try something like an Infectus (used for Xbox 360/PS3 NAND dumping)?
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« Reply #4 on: 29 April, 2012, 11:44:40 »
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Netham, infectus is not much diffetent than what we are trying. In the worst case I will need to desolder the chip, but I got the tools Smiley

@jwalker. One comnection is for the keyboard, and the other one is basically a dock connector in a different form.
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« Reply #5 on: 29 April, 2012, 11:48:31 »
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Quote from: jwalker on 29 April, 2012, 03:39:49
wow, very nice
also what are all of the other conectors on the board for?

One of the connectors is for the keyboard.

The other one is for the TI-TestBoard.
This TestBoard includes a serial DB9 connector and is supposed to have some JTAG.

We published some photos by Adriweb on TI-Planet last summer, but were asked by TI to remove them.
some of you might have kept them somewhere.
« Last Edit: 29 April, 2012, 14:46:03 by critor » Logged
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« Reply #6 on: 29 April, 2012, 17:50:25 »
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Omg, I feel sorry... That's one TI Nspire CAS+ gone...
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What? WHAT? WHATTTT?Huh??

You just lost the game.

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« Reply #7 on: 29 April, 2012, 17:55:43 »
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It still works...
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« Reply #8 on: 29 April, 2012, 17:55:58 »
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What are you talking about? It's still booting...
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« Reply #9 on: 29 April, 2012, 20:17:42 »
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Ok lol. Well, more work to do to disconnect everything Tongue
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« Reply #10 on: 29 April, 2012, 20:21:53 »
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Quote from: AzNg0d1030 on 29 April, 2012, 20:17:42
Ok lol. Well, more work to do to disconnect everything Tongue

sometimes you have to lose something if you want to save many others Smiley and this is one nice example, in the worst case scenario this ones gone, but maybe the other ones could be saved...
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« Reply #11 on: 30 April, 2012, 01:35:40 »
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Wow, nice pics and good luck! Cheesy
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« Reply #12 on: 30 April, 2012, 03:17:55 »
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Awesome, I'm glad somebody finally tried it!

Jim, how did you try to read the card? What error did windows give you?
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« Reply #13 on: 30 April, 2012, 09:13:44 »
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I tried using multiple OS's. However, I realized that the reader is broken Undecided
(Well, it doesn't read working xD cards either)
So now I'm going to use a smartmedia reader Smiley
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