Key2 and key4 are flagged in the Diag guide as "reserved". I presume they are flagged as "reserved" for some vendor(IBM or OTHER) reason.
Can anyone enlighten me? <snip> A frequant usage for this sort of thing is either Key2 or Key4. If you store information in the Key2/Key4 block using MVCDK with the correct key in R1, then you can reduce the likelyhood of storage overlays even if your pgm is running Sup+Key0. </snip> ---------------------------------------------------------------------- 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

