CP/67 won't run on a 370. The virtual memory implementation is different enough to keep it from running. I don't know if CP/67's CMS will run on a bare 370, though it will run under VM/370, so maybe...
If it'll run on a bare 370, it should run on a P/370. On Fri, Jun 19, 2026 at 10:14 PM Farley, Peter < [email protected]> wrote: > Just out of pure curiosity, I wonder if there are any surviving copies of > that “bare metal” CMS system and its documentation outside of IBM deep > archives (i.e., gathering dust at Iron Mountain). > > It would be interesting to bring it up under S/370 emulation or on a > surviving P370 system if anyone has one that’s still operational, just to > see it work, but probably also somewhat frustrating without the supporting > documentation. > > Peter > > From: IBM Mainframe Discussion List <[email protected]> On Behalf > Of Mark S Waterbury > Sent: Friday, June 19, 2026 10:39 PM > To: [email protected] > Subject: Re: GC20-1757 - IBM Virtual Machine Facility/370 Features > Supplement > > > The original "CMS" (Cambridge Monitor System) of CP-67 could run on a > "bare" machine, and this was used to do the initial "SYSGEN" of CP-67, e.g. > to specify the I/O configuration etc. to install CP-67 on an IBM S/360 > model 67. > > > > By the time VM/370 became available in late 1972 or early 1973, the VM > version of "CMS" (Conversational Monitor System) could no longer run on any > "bare" machine as it relied on a number of CP services provided via the > DIAGnose instruction (aka. the "hypervisor call" in today's lingo.) > > -- > > > > This message and any attachments are intended only for the use of the > addressee and may contain information that is privileged and confidential. > If the reader of the message is not the intended recipient or an authorized > representative of the intended recipient, you are hereby notified that any > dissemination of this communication is strictly prohibited. If you have > received this communication in error, please notify us immediately by > e-mail and delete the message and any attachments from your system. > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- Jay Maynard ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
