[Simh] MicroVAX II time across boots

[Wilm Boerhout]

 From simh VAX/vax630_defs.h:

#define NVRBASE         0x200B8000                      /* NVR base */

so that appears to be implemented in the simh "nvr" device. My ini file 
attaches that device to a file, so I would expect that this file acts as 
a battery-operated nvr chip. Still, after closing simh, and restarting, 
VMS still asks for the time. Not so on a reboot of VMS within the simh 
instance.

Time to file a bug?

/Wilm

Anders Magnusson schreef op 11-4-2016 om 15:13:
> It has a clock chip at 0x200b8000 from where it reads current time, 
> similar to a PC.
> The console mailbox is also in that chip.
>
> -- R
>
> Den 2016-04-11 kl. 14:33, skrev Wilm Boerhout:
>> How does a real MicroVAX II preserve its time across boots?
>>
>> How is this implemented in simh MicroVAX II? i.e. what virtual device 
>> should I attach to a file so that the time is preserved in VMS?
>> My configuration (below) does not preserve the time (VMS V7.3 fully 
>> patched)
>>
>> Thanks,
>> /Wilm
>>
>> --- simh config ---
>> ; unused devices:
>> set cr disable
>> set lpt disable
>> set rl disable
>> set tq disable
>> set ts disable
>>
>> att nvr /opt/simh-master/BIN/nvram.bin
>>
>> set cpu 16M conhalt idle=VMS
>> set rom nodelay
>> set qba autoconfig
>>
>> ; DZ11
>> set dz enable
>> set dz lines=4
>> att dz 10000
>>
>> ; DUA controller
>> set rq0 autosize
>> att -e rq0 /vdisk/PAGESWAP.vdisk
>> set rq1 disable
>> set rq2 disable
>> set rq3 disable
>>
>> ; Ethernet
>> set xq mac=08:00:2B:17:08:58
>> att xq tap:tap0
>>
>> boot cpu
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>
>

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