Reliance on 24 bit addressing is a hallmark of the Bill Gates school of capacity projection.
. . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 323-715-0595 Mobile 626-543-6132 Office ⇐=== NEW [email protected] -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Seymour J Metz Sent: Wednesday, December 9, 2020 8:00 AM To: [email protected] Subject: (External):Re: does anyone recall any details about MVS/XA? *** EXTERNAL EMAIL - Use caution when opening links or attachments *** I remember being shocked that IBM believed 24 bits to be enough; it's part and parcel of the short term planning that has come back to haunt us. While I believe that 64-bit addresses will be enough for the foreseeable future, it's not something that I would put any money on. And, yes, if 64 bits starts looking tight, 128 bits is the next logical step, and I would be willing to bet against outgrowing that. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of Mike Wawiorko [[email protected]] Sent: Wednesday, December 9, 2020 9:54 AM To: [email protected] Subject: Re: does anyone recall any details about MVS/XA? 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 [email protected] with the message: INFO IBM-MAIN
