Launch scratchpad from an ndless app

[TheStaticTurtle]

Hi,
Is it possible to launch the scratchpad from ndless without exiting the app? A bit like theses popups/ https://hackspire.org/index.php/Libndls#UI. Or a least launch another tns from the app?

[critor]

Levak designed a PoC to call the scratchpad from an Ndless program in 2012 :

Code: Tout sélectionner

((void(*)(void))0x1022FBE0)();
void * t = ((void * (*)(void))0x10007368)();
((void(*)(void *))0x1002EA20)(t);

Those are syscall adresses specific to the TI-Nspire CX CAS 3.1 OS.
You'll need to find equivalent syscalls for more recent versions, if they exist.

I remember there were several issues with calling the scratchpad from an Ndless program, especially with dialog boxes then called from this scratchpad (not shown or keys not responding in the dialog box context if I remember well).

[Vogtinator]

IIRC the document opening is an event handled in the same task ndless applications run in, so it would be required to return from the application to let event processing happen again.
You could make your program resident and install a hook on closing the scratchpad to jump back into the program again.

Not going to be easy though and you'll have to figure out those syscalls yourself.

[TheStaticTurtle]

Ok, that will be a fun side-project
Is there a way to launch another ndless app ?

[Vogtinator]

Yes, nl_exec: https://hackspire.org/index.php?title=N ... _functions

Note that it uses one of the two available layers of syscall nesting, so not all programs might work correctly...