OS/390 v2.10 had PTFs to add 64 bit mode. z900 announcement z/OS 1.01 had 64 bit mode included. Default 64 bit with 1.04. About 1.10 64 bit required. z14 Around 2.01 IPLed in 64 bit.
On Sat, Jan 14, 2023 at 5:07 PM Steve Thompson <[email protected]> wrote: > > I get the understanding that it and the current release of z/VSE > from IBM are effectively the same (kinda like OS/390 V2.10 and > z/OS 1.1 -- assuming my memory is correct on the last release of > OS/390): > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
