Bryan, I'm not understanding why the scripting capability in simh don't
seem to do it for you...
Johnny
On 2018-01-22 17:57, Bryan Davies wrote:
Thank you Paul.
I now have V4 of Simh and V10.1 of RSTS so at least I'm up to date!
The date/time registers worked. Unfortunately, the start process is
still getting stuck; now at the 'Start timesharing? <Yes>' prompt. My
system doesn't have the 10 second timeout you describe here, although it
DOES have one on the later 'Proceed with system startup" prompt.
I have a vague memory (it's been 30 years!) of an auto restart flag in
the switch register & I'm wondering if you know about this. Or maybe
the problem is elsewhere.
I'd be grateful for any more ideas you have on the subject.
Bryan
On 18 January 2018 at 16:05, Paul Koning <[email protected]
<mailto:[email protected]>> wrote:
> On Jan 18, 2018, at 10:40 AM, Bryan Davies <[email protected]
<mailto:[email protected]>> wrote:
>
> Many thanks to all for the advice. Unfortunately I'm still not quite
there.
There is an easy solution if you have a recent RSTS.
The OS keeps date and time in location 1000-1004. That is preserved
across boot, and if on entry to INIT those locations contain what
seems like a valid date, that's used as the system date/time. This
is why the more recent versions of RSTS don't prompt for date/time
if you do a restart (SHUTUP with restart) or use the BOOT command in
INIT.
Second, if you're running V10.1, the "Start timesharing" prompt has
a 10 second timeout, and will default to "yes" (i.e., start RSTS) at
that point.
So if you start SIMH with a startup script that deposits the date in
1000, and time in 1002, then issues the SIMH boot command, RSTS INIT
will pick up that date/time and after 10 seconds will go on to start
the OS.
RSTS date format: (year-1970)*1000 + day_in_year
RSTS time format: 1440 - (minutes_since_midnight)
RSTS seconds: 60 - (seconds_since_minute)
For example:
$ pdp11 pdp11-42.ini
PDP-11 simulator V4.0-0 Beta git commit id: d3b6018d
sim> d -d 1000 32004
sim> d -d 1002 720
sim> d -d 1004 30
sim> bo rq
?
Thu Jan 18 11:02:00 2018
RSTS P10.1-L V101XM (DU0) INIT V10.1-0L
04-Jan-02 12:00 PM
Start timesharing? <Yes> NO
I entered the values in decimal (with -d) for convenience. You can
see the correct date and time are picked up by INIT. Seconds are
not displayed here but they are saved, so you can set them if you
want to be that precise.
paul
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