[Simh] Shutdown of Vax from Linux shutdown script

David Holland david.w.holland at gmail.com
Mon Feb 5 16:17:50 EST 2007


Not having looked at the SIMH clock code, particularly closely..

Theoretically, yes, you can run the guest OS's, and the host OS's clock
separately. (Presuming you don't have something like NTP running in in the
guest.)  However, _usually_, you want to run to run the opposite way, w/
your guest, and your host clocks synchronized.

Otherwise, when you take down your host for an hour to replace a system
board, or some other maintenance, your guest is now an hour behind.

David



On 2/5/07, Odilon Mader <lists at luminainfo.com.br> wrote:
>
>
>
> At 17:44 05/02/07, David Holland wrote:
> >How would VMS handle the sudden clock jump that will happen when the
> >virtual image gets reloaded?
> >
> >I've not had particularly good luck w/ most Unix OS's/Applications
> >dealing w/ that particular issue.....
> >
> >David
>
> I'm totally new to SimH so I'm not sure. But I don't think such jump
> would happen. The guest's clock doesn't (shouldn't?) depend on the
> host's clock. I was assuming that the emulator's dump command saves
> everything as they were in that moment: memory, registers (clock?), etc...
>
>
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