11 Aug
2006
11 Aug
'06
7:32 a.m.
I managed to hack a Western Digital Ethernet card onto my PCjr and I'm pretty
happy about it. Using a packet driver and my own UDP implementation I can get
24KB/sec off of the machine with UDP checksums, and about 39KB/sec with UDP
checksums turned off.
The bad news is that I have a few more of these cards but the twisted pair
connector is designed for LattisNet. LattisNet is a precursor to the standard
Ethernet over twisted pair and it is supposed to be close, but my hubs aren't
buying it.
The cards have AUI adapters and I was lucky enough to have exactly 1 CentreCom
210 which works fine. I need more though - like about 10. They're on eBay,
but buying them onesy-twosy will bankrupt me on shipping.
Does anybody have a few they want to unload, or know of a good seller? Also,
are all AUI/TP tranceivers equal or should I be looking for something better?
Thanks,
Mike
11 Aug
11 Aug
9:24 a.m.
I managed to hack a Western Digital Ethernet card onto
my PCjr and I'm pretty
happy about it. Using a packet driver and my own UDP implementation I can get
24KB/sec off of the machine with UDP checksums, and about 39KB/sec with UDP
checksums turned off.
The bad news is that I have a few more of these cards but the twisted pair
connector is designed for LattisNet. LattisNet is a precursor to the standard
Ethernet over twisted pair and it is supposed to be close, but my hubs aren't
buying it.
The cards have AUI adapters and I was lucky enough to have exactly 1 CentreCom
210 which works fine. I need more though - like about 10. They're on eBay,
but buying them onesy-twosy will bankrupt me on shipping.
Does anybody have a few they want to unload, or know of a good seller? Also,
are all AUI/TP tranceivers equal or should I be looking for something better?
Hi Mike,
I have Qty-10 of:
Cabletron Systems TPT-2 AUI/TP transceivers
These are flat boxes (approx 6" x 4.5" x 1") which
have a DB-15 AUI connector on one end, and an RJ-45
connector on the other. Never used them, got them with
a load of other stuff, and don't really know anything more
about them (like if they work or not). Cosmetically they
are in excellent condition.
If these are of any interest to you, let me know - yours for
the cost of getting them to wherever you are - currently
located in Ottawa, Ontario Canada. I can send a photo if
you like.
Dave
--
dave06a (at) Dave Dunfield
dunfield (dot) Firmware development services & tools: www.dunfield.com
com Collector of vintage computing equipment:
http://www.classiccmp.org/dunfield/index.html
8:52 a.m.
I have Qty-10 of:
Cabletron Systems TPT-2 AUI/TP transceivers
To anyone considering these-- beware that, even if they work exactly as
they were built to, they may not work for you. I once got a bunch of
boxes which are approximately as Dave describes, but which dated back
to before the 10baseT standards stabilized. They would work fine when
connected to one another via a crossed cable, but would not work with
any other 10baseT hardware I tried them with - typical symptom is a
link light which is glowing faintly, and no traffic making it through.
Now, it may be that Dave's transceivers do work with modern equipment.
But it also might be that they don't.
/~\ The ASCII der Mouse
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2:59 p.m.
The bad news is that I have a few more of these cards
but the twisted pair
connector is designed for LattisNet. LattisNet is a precursor to the standard
Ethernet over twisted pair and it is supposed to be close, but my hubs aren't
buying it.
Do you know what the differences are? Does your ethernet card use a
standard chip for the twisted pair connector -- if so, can you trace out
the circuitry round it to see how it differs from a normal 10baseT
design. It might just be the connector pinout or something.
-tony
12 Aug
12 Aug
7:46 a.m.
Tony Duell wrote:
From what I can find it is a combination of voltage level and
signalling differences, not just a pinout mapping problem. Under
'perfect' conditions with a little goat's blood spread around the room
LattisNet and Ethernet of uTP are reputed to work, as LattisNet was very
close to what became the standard. No joy for me.
I thought the AUI transceivers grew on trees .. I don't mind paying
some money, but to put things in perspective I bought the cards for
$1.50 so I really don't want to pay 6 to 10x more for a commodity part.
Mike
The bad news
is that I have a few more of these cards but the twisted pair
connector is designed for LattisNet. LattisNet is a precursor to the standard
Ethernet over twisted pair and it is supposed to be close, but my hubs aren't
buying it.
Do you know what the differences are? Does your ethernet card use a
standard chip for the twisted pair connector -- if so, can you trace out
the circuitry round it to see how it differs from a normal 10baseT
design. It might just be the connector pinout or something.
-tony
11 Aug
11 Aug
9:46 p.m.
On Fri, 11 Aug 2006 mbbrutman-cctalk at brutman.com wrote:
Does anybody have a few they want to unload, or know
of a good seller?
Also, are all AUI/TP tranceivers equal or should I be looking for
something better?
See http://stores.ebay.com/anthonypanda. He's offering lots of ten for
$115 buy-it-now, shipping $22.
--
David Griffith
dgriffi at cs.csubak.edu
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?
12 Aug
12 Aug
4:32 a.m.
David Griffith wrote:
On Fri, 11 Aug 2006 mbbrutman-cctalk at brutman.com
wrote:
I wouldn't spend more than $1 apiece for them, myself. I once bought 10
for $5.
10Base-FL transceivers on the other hand, I would pay more like $5 apiece.
Peace... Sridhar
Does anybody have a few they want to unload, or
know of a good seller?
Also, are all AUI/TP tranceivers equal or should I be looking for
something better?
See http://stores.ebay.com/anthonypanda. He's offering lots of ten for
$115 buy-it-now, shipping $22. 
10:14 a.m.
Sridhar Ayengar <ploopster at gmail.com> wrote:
David Griffith wrote:
I'm of the same opinion but the last time I bought them was in the very
late 90's, when they would show up on E-bay by the gross and get no
bidders at the penny-a-piece level.
In the past couple of years I've sent probably 50 of them to the junkpile.
Anyone need thicknet transceivers? :-).
Tim.
On Fri, 11 Aug 2006 mbbrutman-cctalk at
brutman.com wrote:
I wouldn't spend more than $1 apiece for them, myself. I once bought 10
for $5. Does anybody have a few they want to unload, or
know of a good seller?
Also, are all AUI/TP tranceivers equal or should I be looking for
something better?
See http://stores.ebay.com/anthonypanda. He's offering lots of ten for
$115 buy-it-now, shipping $22. 
2 Dec
2 Dec
5:09 p.m.
On Fri, 2006-08-11 at 07:32 -0700, mbbrutman-cctalk at brutman.com wrote:
The bad news is that I have a few more of these cards
but the twisted pair
connector is designed for LattisNet. LattisNet is a (...)
(Finally catching up on my 6000-mail backlog, in a bout of energy...)
This is slightly OT, but "l?ttis" or "lattis" is idiotic Scandinavian
teenybopper slang for "hilarious" or "laughing".
"Det er lattis" = "That is lattis" = "That's hilarious",
and somewhat
strangely, "Jeg fikk lattis" = "I got lattis" = "I got
hilarious" = "I
laughed hard".
...Don't look for logic in teenybopper language... Anyway, the word is
commonly understood, even by coherent people, and people look at me with
disbelief when they notice my LattisNet LattisHub... :)
http://toresbe.at.ifi.uio.no/images/misc/lattis.jpeg
-Tore
6361
days inactive
6475
days old
8 comments
8 participants
participants (8)
-
ard＠p850ug1.demon.co.uk -
dave06a＠dunfield.com -
dgriffi＠cs.csubak.edu -
mbbrutman-cctalk＠brutman.com -
mouse＠Rodents.Montreal.QC.CA -
ploopster＠gmail.com -
shoppa_classiccmp＠trailing-edge.com -
toresbe＠ifi.uio.no