>You can't get much more "GUPI" than issuing the LPTEA instruction.
LPTEA gets you the address, but is the page table entry itself PI? No. Anything beyond what is architecturally required to be in the PTE should not be considered part of the programming interface. Any program that chooses to rely on the architectural definition must be prepared to change if that architecture changes. Whether or not a page is page-fixed, for example, is not part of the architectural definition. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN