<snip> So you are saying that the hardware should return '0' is the facility is not enabled, and '1' if it is. </snip>
Sort of. "enabled" is not a term relative to these facilities. Perhaps "supported" or even "present" would be better. The hardware will return 1 if the facility is supported. It will (because the area is set to 0) return 0 if the facility is not supported (if the machine does not know about the facility, it is not going to have any logic related to what to return for a facility bit defined for a newer machine). What the guest sees as the result of its issuing STFLE is typically a subset of the 1's, depending on what the host supports. As Alan A mentioned, facility bit 66 will not be on. I'm not sure why the OP cares about SIE with respect to the results of STFLE. Perhaps just wondering about the difference between what a "guest" OS would see versus what a "host" OS would see? Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
