I have an Axe password protector I programmed with a special feature involving a BCALL.

Any suggestions on how to turn it off in a way that ZStart will still run when the calculator turns on?

That means no "make the calculator think it's low on battery". That results in an APD, and the next time the thief turns my calculator on, it will no longer be locked.

Alternatively, is it possible to suspend my program until the ON button is pressed, to save power without having to deal with ZStart not running or RAM leaks?

The first part of your post is easy. Add in your program a key (or several keys) that makes it quit immediately when pressed. Like

If getKey(54)
   Return
End
<follows the code you already have for your password thing>

Then, when you turn your calc on, press this key (or those keys) while pressing on and it will skip the password.

thats the b_call(_poweroff
in axe it is:
asm(EF0850)


If you enable the on-interrupt and low-power mode in port 03 (http://wikiti.brandonw.net/index.php?title=83Plus:Ports:03), if you execute a halt instruction and set up an interrupt (in IM 2), you can set the interrupt to do whatever you need to do. This is probably easier in assembly and there might be a better way to do it in axe.

There's an opcode floating around somewhere. You need to output a value to some port and halt the cpu, this turns the whole calc off but it will resume your program if you turn it on.

Ime personaly not an Axe pro, but cant you just use
shade()->s
shade(0)
Repeat IsLocked
end
shade(s)
My calculator protector system i wrote just uses shade() to turn the screen "off". But, once again ime no pro in Axe or Ti-8x, so dont be mad if ime missing an important point.

The issue is that you'd still be able to exit that program by simply pulling a battery

Yea...
But you can also bypass the MirageOS protectin by pulling the battery  ...
And like every security system ive tried.

I made a password app with axe and zstart before. Just do:

Code: [Select]

Asm(3E01D303FB76FDCB09A6C9)This powers the calc off and as soon as the on key is pressed the program will resume directly after this line.

I tied out your opcode, it does not really work. It does turn the calculator of, but the it just goes back to the OS, not to the next line of code. For example:

Clrhome
Disp("hello")
Asm(your opcode)
Disp("world")
Reapeat getkey
End

This will display "hello" but not "world". Mabey I have to enable some zstart settings.