Re: Differences between S/380 and XA mode?
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Tim, ? VM/380 mode simply allows access to more than 16Mbytes of memory. The memory above the ¡°line¡± is real, non-paged memory, so must be shared among all VMs that use it. It does not implement XA or ESA mode IO so you can¡¯t IPL a LINUIX system. That would really need a major re-write of CP the VM hypervisor. I can¡¯t see it happening. You can IPL LINUX directly under Hercules though, The POSIIX shell is licenced code so I can¡¯t see how it could run without a licence. There isn¡¯t even XEDIT in VM/370R6 (the release go R1->R6, SP1-SP6, XA SF, XA SP, ESA) so R6 is something like 10 release behind VM/370R6 ? Dave G4UGM ?
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From: [email protected] <[email protected]> On Behalf Of Timothy Stark
Sent: 27 October 2019 15:30
To: [email protected]
Subject: [h390-vm] Differences between S/380 and XA mode?? Folks, ? I googled some information and now learned that there are 380 versions of VM, VSE and MVS.? I now have some questions for you.? What is any differences between S/380 and XA mode? Also I learned some features were already added into VM/370 that can be found in later versions of VM/SE and VM/SP. ? Does VM/380 support ESA instructions? If not, do you plan to implement ESA features into VM/370 for XA mode?? ? For future, do you plan to implement 390 features into VM/370 so that we can ipl linux systems? ? Also I have another question for you. Is that possible to implement POSIX shell and BFS into VM/370? ? I got VM/SP account from LCM and am now learning how to use CMS and CP commands as well as XEDIT editor and PF/PA keys. ? Thanks, Tim
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