AMOSi:Prg Under
Checks if an AMOS program is accessible "under" the current one.
test=Prg Under
test=0 (false)
The current listing has been run directly from the Editor, as a normal AMOS program.
test=1
Your program is the only one being executed, BUT is not the currently-edited program. This happens when you "run hidden program", or use "program to menu".
test=-1 (true)
The program was PRUNned from another program.