Semi-persistent storage for widget state

Thanks for the info. I might do the saving on kill event.

Is there any other way ? Like just writing something to some memory location (I need to store a bool), some function call, anything ?
I wanted to check if I could just write something at some memory location at random.

The experiment:

1.st: I find some memory address that I could potentially use by:

var testArray = new Int8Array(10);
E.getAddressOf(testArray,true);

Return is 536883628;

Then I write some number to this address:

var num = 1 + 4 + 16 + 64;
testArray[0] = num;
testArray[1] = num;

And check the output

peek8(536883628,1);

The return is 85, as expected.

Now I reload the watch (long press on btn3).
And try again.
This time I get a different number (120 instead of 85).
So this tells me the memory was changed and
I can't use this trick to store some number between reboots.
Is there another way ? Like some other memory location,
some function to set some parameter ?

Do I understand this correctly: long-pressing button 3 (or using load) will completely reset the js interpreter, and read all .boot files and so on ?
Would it be possible to use a saved state of the interpreter (saved with http://www.espruino.com/Reference#l__glo­bal_save) which gets loaded at the beginning of a .boot script and contains a Int8Array ?

Or is there really no way to achieve this ?