Hello,
I'm searching a source of good tape for a TU80 and a TU81 I have.
I acquired some media from eBay, but all of that suffers of sticky problem
and is unusable.
Anybody has some to sell, or for give an advice of a seller of proven good
tape?
I wish prefer a seller in EU or UK, but even overseas could be considered,
if I don't find a nearer solution.
Thanks
Andrea
> From: Paul Anderson
> I wonder what happened to the third rack...
And the TU-56...
I'm going to disagree with Al, though - I don't think it's going to go for
that much, it's 'local pickup only'. That's going to severely limit the
bidder pool.
Noel
> From: Ali
> why is there potential for the system to go for insane amounts of money?
I'm going to guess that Al had the GT40 in mind. (I wonder if that was named
after the car, BTW?) I don't see anything else there that's _that_ desirable -
the Diablo (aka RK02/RK03) is pretty rare, and that exposed backplane above it
_might_ be an RK11-C, but I don't think either of them is _that_ desirable.
Although maybe he was just thinking of the whole package... Those plus the RK05,
the PDP-8, two complete H960's - it adds up...
Noel
Paul Koning <paulkoning at comcast.net> wrote:
> I have two items that I'd like to send to a good home. That
> means, someone who can read the item in question and make it
> available so it's preserved.
> 1. A DECtape labeled "VT30 distribution for RSX11D V06-B".
> VT30 is a DEC CSS product, a color alphanumeric terminal.
I have a DECtape TU56 drive and a PDP-11/34, along with
RSX for same, so I could copy it for posterity. However,
the drive and the PDP-11 are in different rooms right now,
and it would be several months before I could unite them
and copy the tape. If you cannot find someone who can do
it quicker, I will be happy to do the job.
(I will be out of town until Tuesday 1/16 and unable to
access email.)
Alan Frisbie
Hello Paul,
I have a VT30 board set, it would be nice to receive a copy, if not the
original, of related bits you have!
Maybe also some documentation?
Thanks
Andrea
> From: Liam Proven
> I had a major WTF moment at that. The actress had a prior or parallel
> career as an engineer?
Why not? Hedy Lamarr:
https://en.wikipedia.org/wiki/Hedy_Lamarr
invented spread spectrum communications! :-)
> From: Dave Mitton
> I could ask John Shriver ;^)
Sure, not a bad idea. He was on the edge of that (he wasn't really part of
the IETF world), but perhaps he has some memory that would bear.
Noel
> I'm to[o] busy right now to dig back through my ancient records (paper
> and email) to find details
So while I didn't have time to do either of these (my Proteon email, if I
still even have it, will be on a magtape I'd have to get Chuck to read; and
the paper records are mixed in with a giant pile of other stuff - I was on the
IESG while I was at Proteon, and it's all mixed in together), I did take a
quick look online to see if I could locate anything from that time period -
knowing how bad human memory really is, I wanted to make sure my memory wasn't
playing me false.
I didn't have high hopes, since stuff from the late 80's is hard to find
online, and I my expectations weren't disappointed (at least, in the brief
time I could put into it), but I did happen to turn up this:
John T. Moy, "OSPF: Anatomy of an Internet Routing Protocol"
which I'd vaguely heard about, but don't have (although I have everyone else's
books; I'll have to get a copy), wherein one may find (pg. 303) this:
"OSPF considered, but did not use, IS-IS as a starting point."
which seems fairly definitive, and straight from the horse's mouth.
I do wish I had access to more contemporary documents to, to give it a bit
more detail. As I recall the circumstances, I had previously wanted to do a
link-state replacement for EGP (to be called FGP) but Dave Clark (who was at
that time on the Proteon board) shot it down (IIRC, in part because he thought
it was too big a job for John - and John was not sanguine either; whereas I
had already seen enough of John to know he was quite capable of it).
That part I remember clearly, but from here on out it gets hazy (I was so busy
with goings-on in the IETF, juggling so many things with that, Proteon, etc),
alas; and it's been too many years since those memories were refreshed by use.
I do recall that we also needed a better IGP, as RIP was not really that good,
and Proteon decided they could do that - and John and I would have agreed that
a link-state design was the only way to go.
It started out as a Proteon-specific thing, for Proteon's customers, but like
SGMP (which started in similar circumstances, before morphing into SNMP), it
soon turned into an 'open' effort, in the IETF. I don't recall how (i.e. why)
that happened, but I assume it was a similar set of reasoning as with
SGMP/SNMP. It might be that if the IETF email archives from that period can be
found, they'd have some useful coverage of that.
My vague memory is that our biggest design influence was the ARPANET work, and
especially the later version which added area support (described in:
Josh Seeger and Atul Khanna, "Reducing Routing Overhead in a Growing DDN",
MILCOMM '86, IEEE, 1986
which I have in hardcopy somewhere, which I saw on the top of a pile recently,
so I can scan it if someone's interested), and also the subject of a memorable
briefing to the proto-IETF by Linda Seamonson, which I remember clearly - not
the technical details, alas, just at how good a presentation it was! :-) I
remember in particular they had a very elegant/clever method for defining the
area boundaries.
Like I said, we did 'borrow' some idea from IS-IS, in particular the sequence
number thing - but that may have come direct from Radia's paper:
Radia Perlman, "Fault-Tolerant Broadcast of Routing Information", Computer
Networks, Dec. 1983
I don't recall where the concept of a designated router stuff came from, if
IS-IS was any influence there or not.
I did interact with John quite a bit in the very early design stages (I'd been
making a deep study of routing for quite a few years, so I was really the only
person there who was steeped in routing he could talk to), but as the work
prgressed - particularly once it moved to the IETF - I got out of the loop, as
I was too busy with other things, and he clearly had things in hand. I also
seem to vaguely recall disagreeing with him about some design points, but I
can't remember what.
Anyway, probably the wrong list for this. (Internet-history would have been
better.) Sorry, I didn't mean to get into a long thing, thought I was just
correcting a bit of nth-hand 'telephone-game' type garbling of a minor point.>
Noel
> From: Phil Budne
> simulating the DL10 so you can run TVs would REALLY be bringing back a
> lost artifact!!
The Knight TV's were connected through the Rubin 10-11 interface, not a DL10.
> I'm pretty sure DN87S was a DN87 front end attached to a (KL) DTE
> (Ten/Eleven) interface instead of a DL10 (or POSSIBLY visa versa).
Ah, right you are: I just assumed from the name (without checking!) that it
was some kind of variant on the DN87 - which I guess it is, just a more major
one than I thought! :-)
I wonder why DEC sold MIT a KL with a DL10 for the second PDP-11 front end?
(The Console-11 was connected via a DTE.) Maybe it was so early in the
product run that the DN87S didn't exist yet?
Noel
This looks like fun.
http://www.avrfreaks.net/forum/decoding-old-data-casette-format
I'm not associated in any way with this.
--
David Griffith
dave at 661.org
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
