17 Dec
2006
17 Dec
'06
12:49 p.m.
It looks like the IBM 5360 in Kansas is back on ebay (the seller says
that the buyer didn't pick it up; probably didn't realize the size of
these things...)
http://search.ebay.com/130059850446
If I had room for it, I'd probably be tempted to go and get it.
BTW, does anyone know what happened to the 1130 in Indianapolis? Did the
machine get moved out ok?
Pat
--
Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
17 Dec
17 Dec
8:18 p.m.
In article <200612171249.21812.pat at computer-refuge.org>,
Patrick Finnegan <pat at computer-refuge.org> writes:
It looks like the IBM 5360 in Kansas is back on ebay
(the seller says
that the buyer didn't pick it up; probably didn't realize the size of
these things...)
http://search.ebay.com/130059850446
What's a 5251 display station? Looks like a terminal to me :-).
I tried finding stuff on google, but most of it is documentation for
products /emulating/ a 5251.
It appears to be part of that coax cable terminal networking stuff and
associated with a 5250 display station controller.
What's the controller do? Are the smarts in the controller with the
keyboard and display being relatively dumb?
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Legalize Adulthood! <http://blogs.xmission.com/legalize/>
8:43 p.m.
On Sunday 17 December 2006 20:18, Richard wrote:
In article <200612171249.21812.pat at
computer-refuge.org>,
Patrick Finnegan <pat at computer-refuge.org> writes:
A 5251 is a 5250-style twinax terminal. ASCII, but not useful unless you
have an S/36 or AS/400 system to use it with.
Twinax was the networking method that S/36 (and later AS/400, and
possibly other S/3x systems) used to attach terminals and printers to
the host. It's basically the equivalent of a 3270-style terminal
attachment to a S/3x0 serial mainframe, except that on the S/3x0, you
have some sort of terminal controller box between the host and the
terminal, and 525x terminals attach directly to the host (each device
has an In and Out port, so you run the cable from the host to Term 1 to
Term 2 to printer 1 to ... and terminate the last device. newer (maybe
all?) devices auto-terminate if there's no twinax cable plugged into
the "out" port.)
You can also pick up "5250 emulation cards", which allow your PC to
emulate a 5250 terminal. All of those that I've seen are ISA cards.
Pat
--
Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
It looks like the IBM 5360 in Kansas is back on
ebay (the seller
says that the buyer didn't pick it up; probably didn't realize the
size of these things...)
http://search.ebay.com/130059850446
What's a 5251 display station? Looks like a terminal to me :-).
9:34 p.m.
In article <200612172043.52682.pat at computer-refuge.org>,
Patrick Finnegan <pat at computer-refuge.org> writes:
On Sunday 17 December 2006 20:18, Richard wrote:
So what's the 5250 display station controller do?
--
"The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download
<http://www.xmission.com/~legalize/book/download/index.html>
Legalize Adulthood! <http://blogs.xmission.com/legalize/>
In article <200612171249.21812.pat at
computer-refuge.org>,
Patrick Finnegan <pat at computer-refuge.org> writes:
A 5251 is a 5250-style twinax terminal. [...] It looks like the IBM 5360 in Kansas is back on
ebay (the seller
says that the buyer didn't pick it up; probably didn't realize the
size of these things...)
http://search.ebay.com/130059850446
What's a 5251 display station? Looks like a terminal to me :-).
18 Dec
18 Dec
8:28 a.m.
On Sunday 17 December 2006 21:34, Richard wrote:
In article <200612172043.52682.pat at
computer-refuge.org>,
Patrick Finnegan <pat at computer-refuge.org> writes:
I have no idea, and don't see one (or any reference) in the auction...
Pat
--
Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
On Sunday 17 December 2006 20:18, Richard wrote:
So what's the 5250 display station controller do? In article <200612171249.21812.pat at
computer-refuge.org>,
Patrick Finnegan <pat at computer-refuge.org> writes:
A 5251 is a 5250-style twinax terminal. [...] It looks like the IBM 5360 in Kansas is back on
ebay (the seller
says that the buyer didn't pick it up; probably didn't realize
the size of these things...)
http://search.ebay.com/130059850446
What's a 5251 display station? Looks like a terminal to me :-).
11:42 a.m.
In article <200612180828.41281.pat at computer-refuge.org>,
Patrick Finnegan <pat at computer-refuge.org> writes:
I have no idea, and don't see one (or any reference) in the auction...
It wasn't in the auction, but when I googed for 5251 display station,
I came across this page on IBM's site, which lists a 5251 (not 5250,
sorry) display station controller.
<http://publib.boulder.ibm.com/iseries/v5r2/ic2924/index.htm?info/phyplan/specs/dispreq.htm>
--
"The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download
<http://www.xmission.com/~legalize/book/download/index.html>
Legalize Adulthood! <http://blogs.xmission.com/legalize/>
A 5251 is a 5250-style twinax terminal. [...]
So what's the 5250 display station controller do? 
19 Dec
19 Dec
7:24 p.m.
Patrick Finnegan wrote:
> You can also pick up "5250 emulation
cards", which allow your PC to
> emulate a 5250 terminal. All of those that I've seen are ISA cards.
I have one of these in the box with original invoice, etc. (one of my
former employers moved into some office space of a place that was run
off of microfische and AS/400s, and they left a lot of stuff behind
when they departed).
One thing I'm sort of looking for is my box of Twinax baluns. When I
find the box, I can hook a real 5250 up to a BA123-sized AS/400 that
was given to me a couple of years ago that I haven't been able to fire
up for lack of a console cable. :-/
-ethan
20 Dec
20 Dec
7:31 p.m.
Ethan Dicks wrote:
One thing I'm sort of looking for is my box of
Twinax baluns. When I
find the box, I can hook a real 5250 up to a BA123-sized AS/400 that
was given to me a couple of years ago that I haven't been able to fire
up for lack of a console cable. :-/
Since twinax is shielded twisted pair, is a BALUN necessary? For a
while, I used one twisted pair from about 50ft of ethernet CAT5 cable to
connect the S/34 in my garage to a terminal in the house. The connectors
on each end were two finish nails selected for the correct diameter.
Worked fine while I was play with it.
-chuck
21 Dec
21 Dec
9:39 a.m.
Since twinax is shielded twisted pair, is a BALUN
necessary? For a while,
I used one twisted pair from about 50ft of ethernet CAT5 cable to connect
the S/34 in my garage to a terminal in the house. The connectors on each
end were two finish nails selected for the correct diameter. Worked fine
while I was play with it.
Twinax was a two-core coaxial cable...But it was so hugely expensive
(and hard to pass thru tubes) that almost all installations used BALUNs.
5:55 p.m.
On Wednesday 20 December 2006 19:31, Charles H. Dickman wrote:
Ethan Dicks wrote:
No, it's a coaxial pair, not twisted pair. And a Balun is
also "necessary" because of the impedence difference between the
cables.
One thing I'm sort of looking for is my box
of Twinax baluns. When
I find the box, I can hook a real 5250 up to a BA123-sized AS/400
that was given to me a couple of years ago that I haven't been able
to fire up for lack of a console cable. :-/
Since twinax is shielded twisted pair, is a BALUN necessary? For a while, I used one twisted pair from about 50ft of
ethernet CAT5 cable
to connect the S/34 in my garage to a terminal in the house. The
connectors on each end were two finish nails selected for the correct
diameter. Worked fine while I was play with it.
Probably worked ok, because you only had one line to run, and no major
sources of RF noise along the cable path. Throw a DC motor, or
anything that generates a good amount of RF or power-line noise, and
you'd probably start having problems.
Pat
--
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The Computer Refuge --- http://computer-refuge.org
26 Dec
26 Dec
10:52 p.m.
On 12/22/06, Charles H. Dickman <chd_1 at nktelco.net> wrote:
Patrick Finnegan wrote:
My recollection of the cabling at the place my baluns came from was
CAT3 network cable. We reused a wad of CAT3 patch cables from their
patch board as station-to-wall jack leads for our 10Mbps VoIP phones
(thus saving our CAT5 cables for workstation use).
Someone else here on the list might come along and say that's out of
spec, but I've seen it in the real world.
-ethan
No, it's a coaxial pair, not twisted pair.
And a Balun is
also "necessary" because of the impedence difference between the
cables.
Corrected.
What sort of cable is typically used in place of twinax when the BALUNs
are used? 
22 Dec
22 Dec
12:09 p.m.
On Sun, 17 Dec 2006, Sridhar Ayengar wrote:
Patrick Finnegan wrote:
I have a whole box of them. I think a bunch of them are reversible ISA/MCA
cards too.
-Toth
You can also pick up "5250 emulation
cards", which allow your PC to
emulate a 5250 terminal. All of those that I've seen are ISA cards.
I've seen Microchannel ones too. 
12:47 p.m.
On Fri, 22 Dec 2006, Tothwolf wrote:
On Sun, 17 Dec 2006, Sridhar Ayengar wrote:
Although it may be specific to the S/34 alone, the S/34 cannot use a
terminal emulation card as its primary terminal/system console. You can
use it to emulate the other consoles, or any printer, but not the primary
one (in socket 0).
So these cards are of no use to someone with an IBM machine, a couple
spools of TwinAx, but no terminal - like myself.
Again, this may only relate to the S/34, but... FYI.
JP Hindin
Patrick Finnegan wrote:
I have a whole box of them. I think a bunch of them are reversible ISA/MCA
cards too. You can also pick up "5250 emulation
cards", which allow your PC to
emulate a 5250 terminal. All of those that I've seen are ISA cards.
I've seen Microchannel ones too.
26 Dec
26 Dec
10:50 p.m.
On 12/23/06, JP Hindin <jplist at kiwigeek.com> wrote:
Although it may be specific to the S/34 alone, the
S/34 cannot use a
terminal emulation card as its primary terminal/system console. You can
use it to emulate the other consoles, or any printer, but not the primary
one (in socket 0).
So these cards are of no use to someone with an IBM machine, a couple
spools of TwinAx, but no terminal - like myself.
Again, this may only relate to the S/34, but... FYI.
Good to know... fortunately, I have a real console (that came with the
system) - just missing the cable until I find my ancient box of IBM
bits.
-ethan
7:54 p.m.
Tothwolf wrote:
I have a whole box of them. I think a bunch of them
are reversible
ISA/MCA cards too.
This sounds intriguing... What do you mean, "reversible"?
I'm picturing an odd-looking card with an MCA edge connector on one side
and an ISA on the other, and maybe some way of swapping the faceplate
around.
Gordon
27 Dec
27 Dec
4:42 a.m.
On 12/27/06, Gordon JC Pearce <gordon at gjcp.net> wrote:
This sounds intriguing... What do you mean,
"reversible"?
I'm picturing an odd-looking card with an MCA edge connector on one side
and an ISA on the other, and maybe some way of swapping the faceplate
around.
Exactly. I've seen some MCA Ethernet NICs with an ISA edge on the
opposite edge from the MCA side, but I can't remember the model
number.
-ethan
6417
days inactive
6427
days old
18 comments
10 participants
participants (10)
-
alexandre-listas＠e-secure.com.br -
chd_1＠nktelco.net -
ethan.dicks＠gmail.com -
gordon＠gjcp.net -
jplist＠kiwigeek.com -
legalize＠xmission.com -
pat＠computer-refuge.org -
ploopster＠gmail.com -
tothwolf＠concentric.net -
wdonzelli＠gmail.com