"Activating compatibility mode" calculator lags

[rabbcat]

I bought the TI-nspire CX CAS and I have a problem that I can not solve. I tried to reinstall the OS, I also tried to download several versions of the gba emulator, of the games i install (super mario bros 3, mario Kart super circuit) but my calculator continues to lag as if it was running at 5 fps. That show me this message : "Activating compatibility mode. This application hasn't been updated to work with your hardware. You may run into weird issues!"
then the application starts and lag. I also installed doom and there is no lag, maybe because doom don't work with emulator. I have the version 4.5.0.1180.

Can someone help me ?

Thanks !

[Lionel Debroux]

Besides buying an old Nspire CX CAS calculator to replace your recent one, there's basically nothing you can do about that matter, caused by a hardware change.

On recent Nspire calculators, for purported cost-saving reasons, TI switched from a 320x240 to a 240x320 LCD controller, which means that all graphics-related code - including the one from TI's own OS - now needs to write rotated data to the screen buffer. The way TI did it in their OS was to leave the graphics drawing routines as is, and add a task which periodically sends a snapshot of the screen buffer, rotated appropriately, to the screen controller - and they had to raise the default CPU clock frequency to compensate for the significant cost of this rotation + copy code.
The compatibility mode of Ndless does precisely the same, for the many applications which weren't updated to work with the new, rotated screen (for various reasons: the author left the community, didn't provide the source code, lost the source code, nobody cared, etc.). Yes, the compatibility mode is slow(er than using a modified program), and doesn't bring perfect compatibility. That's what you're experiencing. But it still enables users to use the old applications at all, if slowly

[rabbcat]

ok so I will never have the opportunity to use these apps...

thanks anyway