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Yeah, when reading VM I thought too much about virtual memory. But IBM famously never used the term memory, but called it storage. So VM probably only referred
by usr1106 3y ago
Yeah, when reading VM I thought too much about virtual memory. But IBM famously never used the term memory, but called it storage. So VM probably only referred to Virtual Machine. So their first virtual machines including all during 360 era, probably still showed physical adresses, even if more than one virtual machine could using the same addresses exist. None of them had page tables, they all had the same addresses. First MVS (multiple virtual storages) changed that.
- rbanffy 3y agoMainframes notably call memory “storage”, so virtual memory becomes “virtual storage”. The idea of virtual machines in mainframes is closely tied to user logins as you get “your own” machine on logon. IBM mainframes diverged from the OS tree very early on and evolved similar services, but with very different conceptual frameworks.