It should be kept in mind that while 31-bit addressing was a 32X capacity jump over 24-bit, 64-bit addressing has 8 billion times the addressing space of 31-bit.
I'm not sure if z/OS actually supports activating the Region 1st DAT table anyway. z/OS may be only a 53-bit OS. So far... sas On Wed, Dec 9, 2020 at 9:55 AM Mike Wawiorko < 0000014ab5cdfb21-dmarc-requ...@listserv.ua.edu> wrote: > I remember an IBM SE presenting XA to us saying 31 bit addressing and 2GB > memory would serve every need. > > Now how long since 64 bit? > > How long before everything fully supports 64 bit though? > > 128 bit next? > > Mike Wawiorko > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
