1) This is the default value for Operator_Consoles in the SYSTEM CONFIG file (and probably most shops do not delete or change the last two entries): Operator_Consoles 0020 0021 0022 0023 0E20 0E21 1020 , System_3270 System_Console As I understand it, the Operating System Messages window is always available to each LPAR. So if it is in most "path"s for z/VM to find a console, why should we ever see PSWs of 1010? Shouldn't z/VM always find the Operating System Messages window as a last resort? (I must have one of my assumptions wrong, because we do see "1010"s).
Related question: given the addresses listed in the default list seem kinda random, is there any reason why 009 *isn't* listed?