<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 [email protected] with the message: INFO IBM-MAIN
