Well,VM/XA MA, VM/XA SF, VM/XA/SP and VM/ESA all used subchannel numbers and couldn't run in S/370 mode, but supported S/370 mode virtual machines. Somewhere around VM/ESA IBM defined a subset of ESA for optional use by CMS (or was it GCS?), and I believe that S/370 mode is now gone. What I'm looking for is the timeline.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of Steve Thompson [ste...@copper.net] Sent: Monday, May 10, 2021 9:14 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: When did CMS stop requiring S/370 mode? I’m going to hazard a guess that it went away when base 370 I/O was dropped. Sent from my iPhone — small keyboarf, fat fungrs, stupd spell manglr. Expct mistaks > On May 10, 2021, at 8:56 AM, Seymour J Metz <sme...@gmu.edu> wrote: > > CMS originally ran on a real S/360 or on a S/60 virtual machine under > CP-67.. The CMS for VM/370 through VM/SP ran on a virtual S/370. When did CMS > stop requiring S/370 mode and when did it stop supporting S/370 mode (if it > did)? > > > > -- > Shmuel (Seymour J.) Metz > http://mason.gmu.edu/~smetz3 > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
