Re: Differences between S/380 and XA mode?
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>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 ? Thanks. I did not know that VM/370 do not have XEDIT.? XEDIT appears in VM/SP Rel 5 or before so that I think. ? I looked at ESA IO and S370 IO instructions on Hercules sources? Both IO mode can coexist together so that it is possible to rewrite CP (VM hypervisor) easy. ?I have to take a look on CP sources on VM six pack distro. Also can extend DAT management to allow paged memory space in 31-bit mode. ? Well, licensed code is not needed.? So can port open-source MSYS into VM/370 for POSIX shell and implement BFS specification like unix filesystem. ?I am looking for BFS specifications. ??POSIX shell and BFS first appears in VM/ESA and later.
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