Is it possible to extend setWatch to include timer interrupts?

Found it
put code at addr, call at addr+1 for thumb code.

var data = atob("AyFAGHBH");
//var addr = process.memory().stackEndAddress-data.length;
var addr = process.memory().stackEndAddress;
for(var i=0;i<data.length;i++){
poke8(addr+i,data.charCodeAt(i));
console.log((addr+i).toString(16)+","+peek8(addr+i).toString(16));
}

addr++;
//var adder = E.nativeCall(1, "int(int)", atob("AyFAGHBH"));
var adder= E.nativeCall(addr, "int(int)");

console.log(adder(2));

Outputs

>echo(0);
20009b3c,3
20009b3d,21
20009b3e,40
20009b3f,18
20009b40,70
20009b41,47
5
=undefined
>