[Stopping thinnet with a 3270 card...]
I once heard of a manager of some sort plugging thinnet into the back
of a VT220 (?It was VTsomething...?) video-out port. Seems he thought
it was one of those network computer deals...
VT220s had a video out BNC connector. You could drive a monitor with
it, but wasn't very useful plugged into a coax Ethernet cable.
Jack Peacock
I found a somewhat stale lead (last November) on three or four
Terak computers that were sold at the monthly University of Washington
surplus sale. Is there anyone on the list familiar with this sale?
- John
Jefferson Computer Museum <http://www.threedee.com/jcm>
For anyone that's interested or just tired of the ads for them, all the
previously advertised test equipment has been spoken for. Thanks for
putting up with the messages.
--------------------------------------------------------------------
Russ Blakeman
RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144
Phone: (502) 756-1749 Data/Fax:(502) 756-6991
Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com
Website: http://members.tripod.com/~RHBLAKE/
ICQ UIN #1714857
AOL Instant Messenger "RHBLAKEMAN"
* Parts/Service/Upgrades and more for MOST Computers*
--------------------------------------------------------------------
Allison wrote:
>The Cray-1 was ECL-10k fast for it's time but low density and rams for
>that technology were 1 or 4k ECL bipolar. ECL had several
>characteristics, FAST, high power consumption and low density.
Excuse my ignorance, what does ECL stand for?
Hans
<I once heard of a manager of some sort plugging thinnet into the back
<of a VT220 (?It was VTsomething...?) video-out port. Seems he thought
<it was one of those network computer deals...
<[Networked computers will be OK. It means all the terminals get run fro
< some large computer off somewhere else. Does this sound familiar?
Yes, happend at DEC sometimes. DEC had VAXmate (AT class) machine that
was netbootable and could do file sharing via eithernet. There were also
X-terminals (DECmindows) that used the net for both the hookup and loading
operating software.
Allison
<>The Cray-1 was ECL-10k fast for it's time but low density and rams for
<>that technology were 1 or 4k ECL bipolar. ECL had several
<>characteristics, FAST, high power consumption and low density.
<
<Excuse my ignorance, what does ECL stand for?
ECL or emitter coupled logic is a form is bipolar logic that operates
at low levels and is non saturating. Non saturating is where the active
devices are neither fully off or fully on. Logic levels are referenced
to a bias level so translation to MOS/CMOS/TTL is required. The reason
for doing non-saturated logic is speed, transistors have a problem like
tubes of charge storage making them harder to turn on or off and reducing
speed. Generally speaking from the late '60s through the '80s ECL managed
to be a factor of 5-20 times faster than the prevailing logic system(RTL,
DTL, TTL) until sub-micron CMOS started to get under 10ns. The last ECL
parts I looked at(years ago) were sub 1nS and could be clocked faster than
1000mhz. An example of the speed difference is 1974 the fastest TTL
divide by 10 (7490) was maybe 35mhz, ECL divide by 10 was 500mhz.
Allison
"Max Eskin" <maxeskin(a)hotmail.com> wrote:
> Today, I received the MCA network card Russ Blakeman sent me.
> Unfortunately, it is called a "3270". I am afraid that it's not a
> real net card, but a 3270 emulator.It has a BNC connector on the
> back. The driver is called "3270 Driver Revision B".
> Can I use this thing with ethernet?
Yes, for certain sorts of useful. You plug the BNC T onto the back of
the card, and it stops all communication on that thin-net segment. At
least that's my experience with such devices. (They told me it was an
Ethernet card. I didn't believe them but they insisted, so I shrugged
and plugged the cable in. It took about five minutes for the
folks hollering from the other lab room to find me.)
If you want an MCA Ethernet card, look for one with both a BNC
connector and a 15-pin D (AUI) connector. Maybe an RJ45 too but
I don't recall seeing many MCA cards that had all three connectors.
-Frank McConnell
If nobody wants the Kaypro PeeCee, I suppose I could pull all of the cards
out for interested parties and ship them. If, however, someone wants the
machine whole, obviously it will be kept whole.
William Donzelli
william(a)ans.net
Today, I received the MCA network card Russ Blakeman sent me.
Unfortunately, it is called a "3270". I am afraid that it's not a
real net card, but a 3270 emulator.It has a BNC connector on the
back. The driver is called "3270 Driver Revision B".
Can I use this thing with ethernet?
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
<Unfortunately, it is called a "3270". I am afraid that it's not a
<real net card, but a 3270 emulator.It has a BNC connector on the
<back. The driver is called "3270 Driver Revision B".
<Can I use this thing with ethernet?
Nope!
Allison
