Q.Why is the nuc linked with sctr? A.The nucleus is linked with SCTR in order to provide the flexibility needed to manage CSECTs on an individual basis and have some CSECTs above 16M have some CSECTs below 16M have some CSECTs cache-line-aligned have some CSECTs placed discontiguously (used to be x'1000', as of z/Arch now x'2000') and not even present after IPL completes (IEAVNIP0 and IEAVNIPH for example)
Obviously the first two are, to some extent, possible for program objects using RMODE=SPLIT (but that sort of functionality is not available anywhere near early enough to be used for the nucleus. And of course RMODE=SPLIT support was developed long after. Presumably the extra processing needed to load the additional control information and to process this stuff was deemed necessary for the nucleus and not important enough to be accommodated afterwards. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
