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<div class="moz-cite-prefix">From simh VAX/vax630_defs.h:<br>
<br>
#define NVRBASE 0x200B8000 /* NVR
base */<br>
<br>
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.<br>
<br>
Time to file a bug?<br>
<br>
/Wilm<br>
<br>
Anders Magnusson schreef op 11-4-2016 om 15:13:<br>
</div>
<blockquote cite="mid:570BA302.4040305@ludd.ltu.se" type="cite">It
has a clock chip at 0x200b8000 from where it reads current time,
similar to a PC.
<br>
The console mailbox is also in that chip.
<br>
<br>
-- R
<br>
<br>
Den 2016-04-11 kl. 14:33, skrev Wilm Boerhout:
<br>
<blockquote type="cite">How does a real MicroVAX II preserve its
time across boots?
<br>
<br>
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?
<br>
My configuration (below) does not preserve the time (VMS V7.3
fully patched)
<br>
<br>
Thanks,
<br>
/Wilm
<br>
<br>
--- simh config ---
<br>
; unused devices:
<br>
set cr disable
<br>
set lpt disable
<br>
set rl disable
<br>
set tq disable
<br>
set ts disable
<br>
<br>
att nvr /opt/simh-master/BIN/nvram.bin
<br>
<br>
set cpu 16M conhalt idle=VMS
<br>
set rom nodelay
<br>
set qba autoconfig
<br>
<br>
; DZ11
<br>
set dz enable
<br>
set dz lines=4
<br>
att dz 10000
<br>
<br>
; DUA controller
<br>
set rq0 autosize
<br>
att -e rq0 /vdisk/PAGESWAP.vdisk
<br>
set rq1 disable
<br>
set rq2 disable
<br>
set rq3 disable
<br>
<br>
; Ethernet
<br>
set xq mac=08:00:2B:17:08:58
<br>
att xq tap:tap0
<br>
<br>
boot cpu
<br>
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<br>
</blockquote>
<br>
<br>
</blockquote>
<br>
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