Jon, I agree but this is part of our bread and butter, makes us our money. Scott
On Thu, Nov 28, 2019 at 9:29 AM Peter Relson <rel...@us.ibm.com> wrote: > <snip> > If you really need speed, check if IBM has any user vector table entries > specifically assigned for customer use. 4 load instructions instead of > searching thru a chain. IBM assigns each entry (e.g. product vendor > request). I vaguely recall it being called CSRCTABL but I could be wrong. > </snip> > > Upon request (to me), IBM assigns to an ISV a slot in the anchor tables > pointed to by CVTCTBL and, starting in z/OS 2.3, ECVTCTBL. > Slots 1009 - 1024 are reserved for customer usage (i.e., the owner of the > system) for whatever they see fit. Slots 1009 - 1024 should be used only > for uses of which the customer approves. > > The slots are 1-origin, so slot 1 is at offset 0. Each slot is 4 bytes > wide via CVTCTBL, 8 bytes wide via ECVTCTBL. The slots are in key 0 > page-fixed common storage. > > 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 > -- Scott Ford IDMWORKS z/OS Development ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
