Here's the most legal 1.4.11643 CAS OS link I know of:

http://web.archive.org/web/20080727191810/education.ti.com/downloads/files/ti-nspire/TI-Nspire.tnc


No other Nspire OS file seems to have been archived by that site.

Thank you thepenguin77 for being so fast.


Seems to work well with OS 2.43.

But with OS 2.53MP, the program doesn't seem to run: the menu is not shown and the program returns immediately.
A problem with the added protection ?

I might have missed something, but I can't use the "bad address" patches posted some pages ago on OSes 2.43/2.53MP.

http://ourl.ca/3687/120342


Note I've had no problem with NODEL243/NODEL253/VERSN243/VERSN253 patches.

I'm using the original unpatched OSes, and a blank TI-84+.


When I press '1', the calculator just seems to freeze.
Of course NODEL243/NODEL253/VERSN243/VERSN253 were taking some secs...
But this time, nothing happens after severall minutes.
Pressing '2' or '3' doesn't seem to trigger anything.

I have to remove a battery, and use the DEL key to access the boot code screen, as the OS doesn't want to boot again.


I've tested:

* addr243 on OS 2.43 (calculator frozen for several minutes...)

* addr253 on OS 2.53 (calculator turned off after several minutes and couldn't be turned back on)

* addr243 on OS 2.53 (calculator turned off after several minutes, could be turned back on showing the same menu without additional information, but the calculator still seems frozen: the '3' key to exit didn't work...)

* addr253 on OS 2.43 (calculator frozen for several minutes... removed battery)


Seems nobody had any problem with that, so I don't understand why I can't make those patches work...

Thanks.

Yes, the so-called "Manager" software does support add-ins.

Sorry if that has allready been reported, but 2.55MP is having problems with Xlib, exactly like 2.53MP.

It might be harder to fix, as the ROM page is completly full...
In 2.53MP, Brandon did call some code he inserted at the end of the page.

Nice stuff cfxm. Does this means there are actually two ways to perform this?

It's the same way. We're using the same tools.
There is just an additional step on the french Casio models with the current pfxRecover version.

Does this means that the OS can actually be clocked down to even slower speeds? That might be good for some programs that doesn't require much processing power.

Yes, you can downclock with Nover too, as I let you fully control all parameters values.

But don't downclock too much...
On all OSes (even 2.1), you get garbage over the display if some frequencies are too low.
I haven't tested very much (as I'm not interested in that), but it seems the Nspire screen doesn't like CPU frequencies of around 120MHz and lower.