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Community News & Discuss Nspire =>
Technology & Calculator Open Topic
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yifanlu
Newbie
Joined: 21 Mar 2010
Posts: 15
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 Posted: 04 Apr 2010 11:51:15 am Post subject: |
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First of all, I have very little knowledge of the Nspire and it's inner workings. But I was just wondering.
Ndless allows the running of unsigned files right? That's how we can run the GBC emulator and stuff. It's done by a buffer overflow on some system file (I don't know what). On OS 2.0, this exploit it fixed. Is it possible to somehow patch the system files in OS 2.0 to have the exploit again, package it up into an unsigned system update, and run it using Ndless? |
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Lionel Debroux
Member
Joined: 01 Aug 2009
Posts: 170
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| Posted: 04 Apr 2010 11:59:27 am Post subject: |
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Well, TI has very recently started attacking Ndless, so don't expect the developers and the community as a whole to give much public information about the next iterations of Ndless  |
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yifanlu
Newbie
Joined: 21 Mar 2010
Posts: 15
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| Posted: 04 Apr 2010 12:28:50 pm Post subject: |
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| Ok, stupid question alert: in an nspire update, is the actual os files in boot2.img (like, the executables)? If so, is there any way to "extract" it? TI-Nspire.img only contains .res files, and I can't find a boot1.img (I'm looking at the 2.0 upgrade file). |
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Levak
Advanced Newbie
Joined: 11 Nov 2009
Posts: 94
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| Posted: 04 Apr 2010 01:00:48 pm Post subject: |
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Yifan wrote: Ok, stupid question alert: in an nspire update, is the actual os files in boot2.img (like, the executables)? If so, is there any way to "extract" it? TI-Nspire.img only contains .res files, and I can't find a boot1.img (I'm looking at the 2.0 upgrade file).
Nspire Os is crypted into the TI-Nspire.img that way you can view it by simple extracting. The ARM emulation with the boot2 file allow you to decrypt the OS included into the TI-NSpire.img.
To make you some idea about it, you can look the emulator that Goplat made 
Last edited by Guest on 04 Apr 2010 01:02:01 pm; edited 1 time in total |
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yifanlu
Newbie
Joined: 21 Mar 2010
Posts: 15
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| Posted: 04 Apr 2010 01:33:55 pm Post subject: |
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Levak wrote: Yifan wrote: Ok, stupid question alert: in an nspire update, is the actual os files in boot2.img (like, the executables)? If so, is there any way to "extract" it? TI-Nspire.img only contains .res files, and I can't find a boot1.img (I'm looking at the 2.0 upgrade file).
Nspire Os is crypted into the TI-Nspire.img that way you can view it by simple extracting. The ARM emulation with the boot2 file allow you to decrypt the OS included into the TI-NSpire.img.
To make you some idea about it, you can look the emulator that Goplat made
Yes, what I'm trying to do is to access the system files, but I have no idea how. Do I extract the .ROM file (how)? |
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fb39ca4
Newbie
Joined: 24 Jan 2010
Posts: 8
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| Posted: 06 Jun 2010 05:13:13 pm Post subject: |
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| Does anyone know if the os is encrypted when it is sent calc to calc? If not, we may be able to write our own program to send it, with some changes |
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calc84maniac
Elite
Joined: 22 Jan 2007
Posts: 770
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| Posted: 06 Jun 2010 05:18:23 pm Post subject: |
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fb39ca4 wrote:
Does anyone know if the os is encrypted when it is sent calc to calc? If not, we may be able to write our own program to send it, with some changes
We already have the OS decrypted. The issue is getting a calculator to accept a modified OS, because we don't have the signing keys. |
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