>in 2.1, the low 8K is “PSA”, not just 4K. It has been 8K for z/Architecture, not since 2.1
>You can’t update it even if you are key zero. This is not correct for "8K" or "4K". Only a section of the PSA is subject to Low Address Protection which is what prevents modifications even from key 0. 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
