16 Oct
2022
16 Oct
'22
6:20 p.m.
On 2022-10-16 16:42, Paul Koning wrote:
Hmm. I see that I conflated MOP with microcode updates a bit when trying
to remember this.
Anyway, the mopd in NetBSD can boot both DECservers as well as actual
VAXen (I've done it *lots* of times). The DELUA manual gives a good
start, and the mopd code should give enough to get it all running in
PyDECnet, I would expect.
The actual file format of the system images for the DECservers that I
have is actually the same as the RSX task image format. But it is images
without a task header (if you dive into it, you'll understand).
.tin du:[5,54]pr0801ENG.SYS
TIN V1.8
Task name: DS2$WR Date: 10-DEC-90 Pri=0. Start=013000. EXTTSK=000000.
Label block revision: 0.
Task addresses - Low: 013000, W0 high: 177777, High: 177777
Load size: 00570200 Max size: 00570200 # of window blocks: 1.
Task flags (040100): -HD -CHK
Partition: SYSTEM Offset: 000000
System ID: RSX-11M.
.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt(a)softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
On Oct 15, 2022, at 9:06 PM, Johnny Billquist
<bqt(a)softjar.se> wrote:
On 2022-10-15 20:39, Paul Koning wrote:
You can find most all images on MIM::DU:[5,54]*ENG*.SYS
Also, if I remember right, the DELUA manual (or if it was the DEUNA one), do contain a
lot about MOP, and you also have the free mopd which you can find in the NetBSD
distribution among other places.
Thanks. I have the MOP spec, of course (and since I wrote it I should remember it...)
What I was looking for is a trace of what VMS does, since reality doesn't always match
the spec. That, and an understanding of what loadable files look like, that's an
implementation specific detail not give in the DECNet specs. On Oct
15, 2022, at 10:32 AM, Dave McGuire <mcguire(a)neurotica.com> wrote:
...
LSSM has a big Itanium2 VMS machine that's our always-on HECnet node. It also
provides MOP services for our DECserver terminal servers, etc. Because the transatlantic
links can sometimes be a bit slow, and there are several RSX-11M-PLUS systems between LSSM
and my place, I maintain a local copy of the RPM repository on that system, that I copy
periodically from MIM:: and all local instances of rpm are configured to point at that.
One of these days I hope to add MOP load/dump to PyDECnet. For that some network
traces of how VMS loads a terminal server would be helpful, along with a copy of the image
it uses.