The same is true with Ultrix, see the code snipped I posted. It only
prints out lock mode or not.
-- Ragge
Den 2016-08-31 kl. 17:06, skrev Mark Pizzolato:
The pdp11_xq device simulates 3 boards:
1)DEQNA
2)DELQA
3)DELQA-T
The DELQA documentation refers to specifically enabling DEQNA Lock
mode which can be specified by switch and/or programmatically.
When implementing the simulator, beyond the fact that there is a DEQNA
Lock mode, the document really doesn’t mention what is
special/different about the behavior of the DELQA device when it is in
DEQNA Lock mode. VMS doesn’t handle the DEQNA and the DELQA
differently beyond merely identifying one board from another. VMS
does detect the DELQA-T and it leverages the completely different/more
efficient/less ambiguous programming model.
If someone can provide the various versions of the Ultrix drivers for
this device and maybe explain how the different devices are treated
differently by those drivers we can make the simulated devices more
precisely match what the original hardware did.
*From:*Simh [mailto:[email protected]] *On Behalf Of
*Cory Smelosky
*Sent:* Wednesday, August 31, 2016 7:52 AM
*To:* Johnny Billquist <[email protected]>
*Cc:* [email protected]
*Subject:* Re: [Simh] Ultrix 4.0 and DEQNA-LOCK
[inline]
Sent from my iPhone
On Aug 31, 2016, at 03:30, Johnny Billquist <[email protected]
<mailto:[email protected]>> wrote:
Hi.
On 2016-08-31 04:43, Cory Smelosky wrote:
4.5 exhibits the same "now it's suddenly in DEQNA" mode behaviour.
Well, then I retract my guess. By 4.5 I would expect the code to
handle a DELQA natively. Ragge also posted the source code for
4.5, which clearly states that it should handle the DELQA...
Yeah - I'm very confused by that!
(it also panic()s every first boot after first starting the
emulator)
Huh. That really do sound like a bug. Since it don't happen on
real hardware I would guess a simh issue. What kind of VAX are you
emulating, by the way? The 3900?
Yup - 3900. It didn't occur to me until now it might not be
coincidence it panics with a segfault right after probing the network
card...I wasn't noticing any network issues until now though I guess.
Johnny
On Tue, Aug 30, 2016, at 08:04, Clem Cole wrote:
On Tue, Aug 30, 2016 at 6:38 AM, Johnny Billquist
<[email protected] <mailto:[email protected]>> wrote:
Not sure there are any bugs here. Ultrix might just
change it to run in DEQNA mode. Maybe because it
didnät have a driver for running it in DELQA mode in
4.0? Just guessing here, but it don't look to me as if
there actually is a bug anywhere.
I've long since forgotten the details. The 4.5 SPD says
it should work (modulo firmware - which I suspect simh is
assuming that). Johnny is probably right.
Cory: Is there a reason you are running 4.0 not not
something later than 4.4. There a ton of bugs fixed in
the 4.3/4.4 development. The Vax has sort of been
forgotten by the Ultrix/Tru64 teams in favor of the PMAX
and the Alpha; thus entropy had set in on the Vax code.
Even though 4.3 was not an officially bug release, it
had more bug fixes in that any previous one, because a
number of just got sick of dealing with it and there was a
3-4 week development hiatus where we just cleaned up
things. IIRC this was particularly true for the
networking stack, because we were heaving pathworks
development then and the Pathworks stack kept turning up
small boundary conditions in the Unix side.
Anyway -- if you are going to run Ultrix, I highly
recommend 4.5 - which was really the most stable of the
all the Ultrix releases. For instance, the SCSI stack is
(finally) common with Tru64, as we back ported Fred's
Alpha stack to the Vax and PMAX. As a result it will
cover a lot more devices. I seem to remember we did some
similar things in the Network code too, but again I've
forgotten (I was worrying about TruClusters at that time
but would occasionally consult to the Ultrix folks).
_________________________________________________
Simh mailing list
[email protected] <mailto:[email protected]>
http://mailman.trailing-edge.com/mailman/listinfo/simh
Email had 1 attachment:
* ultrix4.5_spd.pdf
297k (application/pdf)
--
Cory Smelosky
[email protected] <mailto:[email protected]>
_______________________________________________
Simh mailing list
[email protected] <mailto:[email protected]>
http://mailman.trailing-edge.com/mailman/listinfo/simh
_______________________________________________
Simh mailing list
[email protected] <mailto:[email protected]>
http://mailman.trailing-edge.com/mailman/listinfo/simh
_______________________________________________
Simh mailing list
[email protected]
http://mailman.trailing-edge.com/mailman/listinfo/simh
_______________________________________________
Simh mailing list
[email protected]
http://mailman.trailing-edge.com/mailman/listinfo/simh
