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Last night, new TI-Nspire 3.6 OS files were found on TI servers.
The complete version number is 3.6.0.543, and it was built on Sept. 11th, 2013.
The OS is available for :
- TI-Nspire
- TI-Nspire CAS
- TI-Nspire CX
- TI-Nspire CX CAS
Let’s notice that we couldn’t find any release for the chinese TI-Nspire CM, which already skipped OS 3.2.4. Are those models discontinued?
The TI-84+SE version for TI-Nspire calculators remains the same 2.56MP.
This OS sets the minimum installable version to itself (3.6.0.546) and thus forbids any possibility of going back to any prior version - which is actually counter-productive since several bugs were found in the recent releases that weren't there before, in versions that worked better….
The OS does include Boot2 3.2.4 for the TI-Nspire CX and Boot2 3.0.1 for the TI-Nspire ClickPad/TouchPad.
Let's note that there is a new quite evil protection. The OS installation files contain new ‘manifest' files with the signed list of all files included and their signatures ! As a result, it is impossible to make any changes to these files: they can not be deleted or replaced.
As a result, it becomes impossible to use our TNOC utility to remove the useless Boot2 in 99% of cases and furthermore harmful, as well as sample files.
This means in practice that if you install the OS 3.6, the available space on your TI-Nspire ClickPad / TouchPad, for example, will drop to 14.3 Mo, and the update to nLaunch-incompatible Boot2 is mandatory.
Remember that at the time of the OS 3.0, the update to the 3.0 boot2 could destroy your TI-Nspire ClickPad / TouchPad, and TNOC helped limiting damage and therefore the number of calculators exchange for Texas Instruments. Such an attack against the tool, ignoring the past, is not acceptable.
If you remove the Boot2 from the 3.6 OS file, the system will devilishly pretend to function normally at first. But after the first start, it will change the minimum installable version to 3.6.0.546 and will self-destruct, reporting a discrepency in the RS232 log visible here. You are now condemned to stay with an unusable calculator until you accept to install the original version of the file OS 3.6, now the only accepted version.
The home screen directly indicates the availability of the CAS engine, allowing a quick check during exams that forbid it:
We can also notice the new designs of the main calculator application, graphs, spreadsheet and Vernier :
Changes on the Lua scripting side will be detailed later.
We therefore do not recommend installing the OS 3.6 if you've got a monochrome TI-Nspire, or a TI-Nspire CX still running a nice 3.2.3 release or earlier. We may find a software-way to use the 3.6 OS in a controlled manner from these versions. But if the OS 3.6 is installed the normal way, that is to say, with all its protections, it will remain uncontrollable and going back will be very difficult because it will require external hardware, or may actually be impossible in the current state of our knowledge.
Source: (and downloads...)
http://tiplanet.org/forum/viewtopic.php?t=13206&lang=en
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发表于 2013-10-13 22:35:09
沉默卡
变色卡
千斤顶
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发表于 2013-10-13 23:44:11
楼主
