HDTenEightyP/NetNews huggingface dataset:
From: ppascoe@bjudev.UUCP (Phillip Pascoe)
Subject: boot volume on 3B2/600 problems
Organization: Bob Jones University
Distribution: na
Date: Mon, 27 Jul 92 18:40:17 GMT

	I have an AT&T 3B2/600 with a CDC 150 Meg boot disk and a Maxtor
XT-4380E that is having troubles with the root disk.  I am trying to
replace the CDC drive with another Maxtor XT-4380E and keep coming up with
the same message after booting with the tape drive.  The message is ERROR:
No SCSI ROOT disk devices found
Shutting the machine off...

I have used fmthard with a file containing the partitioning information
similar to what is currently listed for the CDC drive with increased space
due to the bigger drive.  I used /etc/newboot to load the boot files into
partition 7, and labelit to label partition 0 as root and partition 2 as
usr.

Using the CDC drive as the boot volume and the Maxtor as the second disk in
the system seems to work fine, as I can volcopy to partition 0, etc.

Any thoughts or explanations of the error message and how to fix it?

Thanks.

Please email responses.
-- 
-----------------------------------------------------------------------------
 Phillip Pascoe              Bob Jones University              Greenville, SC 
 uunet!bjudev!ppascoe                                    Opinions are my own.
-----------------------------------------------------------------------------
Newsgroups: comp.sys.att
From: w8sdz@tacom-emh1.army.mil (Keith Petersen)
Subject: Need TN3270 for ATT 3B2
Organization: The SIMTEL20 Archives
Distribution: na
Date: Tue, 21 Jul 1992 06:12:46 GMT

I have received a request for TN3270 for a ATT 3B2.  Please contact
me if you have this program.  It's a special version of TELNET that
does IBM 3270 terminal emulation.

Keith
--
Keith Petersen (MACA WSMR)
w8sdz@tacom-emh1.army.mil
Newsgroups: comp.sys.att
From: david@indetech.com (David Kuder)
Subject: Re: Dusty Machines
Organization: Independence Technologies, Inc. Fremont, CA
Distribution: na
Date: Thu, 30 Jul 1992 22:18:24 GMT

In article <1992Jul23.203818.16799@cuuxb.att.com> of alt.folklore.computers
	fmcgee@cuuxb.UUCP (Frank W. McGee) writes:
> The tape drive should be cleaned after every eight hours of use, and
> after a new tape has been used (the new tape might deposit loose tape
> debris on the tape heads).

So the heads should be cleaned after every 4 or 5 uses for backup since
a backup takes about 2 hours?

> When Bell Labs tested tapes for the StarServer E here, they found the
> following general tape life guidelines for complete full-length passes:

>DC 6320 - 50 full-lenth passes
>DC 6525 - 30 full-lenth passes (because of the thinner media)
>DC 6150 - 40 full-lenth passes
>DC 600A - 30 full-lenth passes

So since filling a tape takes one full-length pass per track, we get
about 4 or 5 uses per tape for backup before the tape should be
decommisioned?

Looks like the rule of thumb is:
	Use the tape for a week of backing up, then clean the drive
	and decommission the tape.

So anybody thinking about using QIC for backup better not have a lot
to backup because the media cost will kill them.
-- 
David A. Kuder                                           Nothing pithy today
510 438-2003  {uunet,sun,sharkey,pacbell}!indetech!david  david@indetech.com
Newsgroups: comp.sys.att,news.answers
From: dsc3jfs@nmrdc1.nmrdc.nnmc.navy.mil (Jim Small)
Newsgroups: comp.sys.att
Subject: SLIP on 3b2
Date: 28 Jul 92 12:57:19 GMT
Organization: Naval Medical Research & Development Command

We're looking for a slip implementation for the 3b2.  If you know of one
please suggest it.  If you haven't tested it, and are just suggesting
another SLIP implementation, please don't reply.  3B2's are hell on earth
and converting the code would be a major bear.

We have 3B2 600, with WIN TCP
R 3.2 I think

-- 
I love the 3b2
The 3b2 is my friend.
Xref: sparky comp.sys.att:1896 comp.sys.ncr:396
From: fmcgee@cuuxb.att.com (~XT6561110~Frank McGee~C23~L25~6326~)
Newsgroups: comp.sys.att,comp.sys.ncr
Subject: Re: QUESTION: modified /etc/rc2 screwing up booting
Summary: be VERY careful when setting your domain name
Keywords: domain
Date: 23 Jul 92 20:08:00 GMT
Expires: Tue, 22 Sep 1992 05:00:00 GMT
Reply-To: fmcgee@cuuxb.UUCP (Frank W. McGee)
Followup-To: comp.sys.att
Distribution: comp
Organization: AT&T Computer Systems, Lisle, IL

In article <1992Jul20.121519.13854@vax5.cit.cornell.edu> iojj@vax5.cit.cornell.edu writes:
>Being a new sysadmin without manuals (almost) or fear of destroying the system 
>;-) I have a little problem.
>
>On my StarServer E running SVR4.0.2, I edited /etc/rc2 and /etc/rc3 to include 
>the line 
>	
>	. /usr/bin/domainname <domainname>
>
>which resulted in this message upon rebooting:
>
>	INIT:  Command respawning too quickly. Check for possible errors.

You're rather lucky; in some cases this can cause the machine to
panic.  The 4v3 release notes state that you should set your
domain name by changing the line :

#define SRPC_DOMAIN	""

in /etc/conf/pack.d/kernel/space.c.

For example, to change your domain name to NCR.COM, the line
would look like :

#define SRPC_DOMAIN	"NCR.COM"

Then run /etc/conf/bin/idbuild and reboot the machine with
/etc/shutdown.

As you can see, when SRPC_DOMAIN is linked into the kernel, it
is a zero-length null-terminated string in the kernel.  If you
don't change it in the space.c file, no space get's allocated
for it, and when you use domainname, it trashes whatever
structure was behind the SRPC_DOMAIN data area.  Usually on
SSE UNIX it's the tty structures.  That's the reason why you
were getting getty errors.  Under some circumstances this
can panic the machine.

This may be true in other SVR 4 ports as well (that's the
reason for the cross-post to the NCR group).

Hope this helps you out,

Frank McGee, PM&S Naperville
NCR Corporation
nap-top!fmcgee@ccscae.ColumbiaSC.NCR.COM
-- 
Frank McGee, AT&T
Entry Level Systems Support
attmail!fmcgee (preferred)
att!cuuxb!fmcgee (those that can't reach attmail)
Newsgroups: comp.sys.att,comp.protocol.tcp-ip
From: merce@xenitec.on.ca (Jim Mercer)
Subject: reset problem with WIN/TCP on 3B2
Organization: Reptilian Research, Kitchener, Ontario, CANADA
Date: Fri, 31 Jul 1992 03:08:54 GMT

we are using NCSA and CUTCP to access our 3B2's from our PC's.

occasionally, all sessions on a given 3b2 will be tossed via a "remote reset"
or some such error.

the messages i see in NCSA indicated that the 3b is shutting the session
down.

oddly enough, the processes running on the pty continue to hang around for
a bit and eventually go away.

anyone else seen this?

any solutions would be appreciated.

email to jim@lsuc.on.ca will be summarized.

-- 
[ Jim Mercer   Reptilian Research  merce@iguana.reptiles.org  +1 519 893-6085 ]
[             I don't want to work for a company that has a CIO.              ]
[              Disclaimer! I don't need no stinking Disclaimer!               ]
Newsgroups: comp.sys.att,misc.forsale.comp
From: chang_ck@jhunix.hcf.jhu.edu (Jinguang Zhang)
Subject: Complete 3b2 system software for sale
Organization: HAC - Johns Hopkins University, Baltimore
Distribution: usa
Date: Tue, 28 Jul 1992 21:09:57 GMT

I have the following 3b2 system software for sale. All are the original AT&T
floppies in good condition.

3B2 Core unix Pack:
Floppy Key
Essential Utilities (2.0.5) 1-5

Unix system V Utilities Pack:
User environment utilities
Help utilities
File permission update
Graphic utilities 1-3
Basic networking utilities
Terminal information utilites 1-2
Directory and file management utilities
Spell utilities
Performance measurement utilities
Line printer spooling utilities
Inter-process communication utilities (2.0.5)
Terminal filters utilities
Security administration utilities
System administration utilities
Editing utilities

The floppies are marked III M.

If interested, please make a reasonable offer.

J. Zhang
From: bdette@gumby.Altos.COM ( AOS)
Newsgroups: comp.sys.att
Subject: AT&T Keyboard mouse driver.....
Date: 21 Jul 92 03:50:14 GMT
Reply-To: bdette@altos.Altos.COM (Bob Dette - AOS)
Organization: Altos Computer Systems, San Jose, CA.

Keep it short and simple. Myself and a few friends are looking for the
latest AT&T Keyboard Mouse Driver. I've got version 1.04. Anybody got
anything higher? Or has anyone written their own driver for this device?

E-mail perferred at the above address.

thx


------
Bob Dette      bdette@altos.com  [or]  ...!mips!svcs1!rdette
------
Newsgroups: comp.sys.att
From: hak@alf.cooper.edu (Jeff Hakner)
Subject: Re: Problem with 3b2/310
Organization: The Cooper Union ( NY, NY )
Date: Tue, 28 Jul 1992 01:44:24 GMT

in article <kzwxzd+@rpi.edu>, nautilus@lachesis.acm.rpi.edu (John M. Twilley) says:
> 
> 
> I accidentally deleted /filledt, and I am having trouble getting it back
> to work. :-(
>  
> It won't get as far as DIAGNOSTICS  PASSED.
>  
> I _think_ I can get it to work if I can make a standalone /unix
> disk....
>  
> Any suggestions?
Find your ESSENTIAL UTILITIES diskettes!!  Insert diskette #1.
After SELF_CHECK, hit the reset switch on the back of the 3B2.
After getting the "SYSTEM FAILURE, etc." message, type the
firmware password (mcp by default).  You will now be in FIRMWARE MODE.
When you are asked which program to run, type filledt.  Enter
0 for the device code.  If this is working, the message will be
"BEGIN FILLING EDT".  You may get some spurious error messages
about unknown device codes.  These may be ignored.  Finally,
when filledt finishes, your program to run is unix, for the device
code, use 1 (should be the hard disk).  Your system should then
come up all the way.  The red DIAGNOSITC light will be on,
don't worry about it.  Once your system is up, recover /filledt
from your last backup of the root filesystem.

-Jeff Hakner
-confessed 3B2 guru
From: SKLYONS@MAINE.MAINE.EDU
Newsgroups: comp.sys.att
Subject: monitor/hard disk questions
Date: 30 Jul 92 13:17:57 GMT
Organization: University of Maine System

Please reply to:  jeanne@portland.maine.edu, or post

1.  Can anyone give specific data (cabling changes, etc.) needed to
    change an Olivetti/AT&T/Xerox color display to an EGA monitor?
    Please be specific.

2.  On an Olivetti/AT&T/Xerox XT, with a WD disk controller (new)
    and a Seagate 251-1 -- the hardware recognizes the drive as
    Drive D only (unit 1).  Straight or flipped cables.  All the
    drive select jumper settings have been tested.  No good.
    The drive is the second drive tested.  Termination, etc. tried.
    Ideas?  HELP!!!
___________________

jeanne@portland.maine.edu
University of Southern Maine
From: terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr.)
Newsgroups: comp.sys.att
Subject: Re: Dusty Machines
Date: 24 Jul 92 11:32:52 GMT
Followup-To: comp.sys.att
Distribution: na
Organization: St. Peter's College, US

In article <1992Jul23.203818.16799@cuuxb.att.com>, fmcgee@cuuxb.att.com (~XT6561110~Frank McGee~C23~L25~6326~) writes:
> DC 6150 - 40 full-lenth passes

  Something strikes me as odd about this. Since QIC-150 is an 18-track ser-
pentine recording system, that means that a backup followed by a compare
operation will consume 36 passes, leaving -14 available by the completion
of the restore.

  Is it possible they meant 40 complete backup cycles?

	Terry Kennedy		Operations Manager, Academic Computing
	terry@spcvxa.bitnet	St. Peter's College, Jersey City, NJ USA
	terry@spcvxa.spc.edu	+1 201 915 9381
From: root@hawk.UUCP (Administrator)
Newsgroups: comp.sys.att
Subject: Wordperfect 5.0 for a 3B2/4
Keywords: WP50, 3B2/400
Date: 29 Jul 92 03:20:13 GMT

Hello:

	I am still searching for a copy of WordPerfect 5.0 for my home
toy. I would like to buy used if at all possible.

Many thanks,
Mike Ibarra
ibarra@hawk.com
 
Newsgroups: comp.sys.att
From: mikem@news.ccutah.edu (Michael Mayberry)
Subject: AT&T 750CX X-Terminal
Organization: University of Utah Computer Center
X-Newsreader: Tin 1.1 PL3
Date: Fri, 31 Jul 92 18:45:29 GMT

I was wondering if there is any information available on the
format of the /dl/.Config file that the AT&T 750CX X-Terminal
uses.  We didn't get any type of manuals with them exept the
user's manual.  If anyone has any information on this setup
file, I would appreciate them email me at mikem@icarus.weber.edu
or reply to this posting.

				Mike Mayberry
Newsgroups: comp.sys.att
From: sjb@theory.TC.Cornell.EDU (Stephen J. Bradshaw)
Subject: DOS upgrade
Organization: Cornell Theory Center
Distribution: na
Date: Thu, 23 Jul 1992 20:48:30 GMT


Posting for a friend.  Please respond to moore@oracorp.com.

Can AT&T MS DOS 3.2 be upgraded to MS DOS 5.0, or is it
necessary to get the AT&T version of MS DOS?  Thanks in
advance.
Newsgroups: comp.sys.att
From: tgeorge@cbnewsb.cb.att.com (timothy.d.george)
Subject: GSS on 386
Organization: AT&T
Date: Fri, 31 Jul 1992 20:41:53 GMT



	HELP!
	I need to find where I can get the GSS graphics package
	to run under AT&T Unix 3.x or higher for the 386 processor.
	Any ideas? Suggestions? SCO CGI does not work for what I need.
	I need the COFF version, not x.out.

	Thanks in advance

	Tom

	(201) 581-5051

	or send mail to attmail!syadnj!troehr
From: pjh@mccc.edu (Pete Holsberg)
Newsgroups: comp.sys.att
Subject: Re: Virtual Terminal SV/386 R3.2.2
Date: 27 Jul 92 14:14:39 GMT
Organization: The College On The Other Side Of Route One

In article <tr.712204038@samadams> tr@samadams.princeton.edu (Tom Reingold) writes:
=pjh@mccc.edu (P. J. Holsberg) writes:
=
=$ /etc/inittab starts /etc/vtgetty console console.
=
=$ Is it possible to run /etc/vtgetty for any other port? If so, how? I
=$ looked at TFM but ...
=
=What sort of port were you hoping to run virtual terminals from?  I am
=fairly certain that they use a device driver that directly read the
=keyboard and write to the video buffer.  This would not work over a tty
=port.  If you want that sort of thing, run "screen" which has some
=features over vtlmgr anyway.

Modem port.

I thought that screen required facilities not present in AT&T SV/386
R3.2.2 UNIX (sockets? pttys? ??). Is that not so? Does screen recognize
"hot keys"?
Newsgroups: comp.sys.att
From: dke@epx.cis.umn.edu ()
Subject: wantted scsi and ethrnet cards
Summary: see above :)
Keywords: expansion
Organization: University of Minnesota
Distribution: usa
Date: Tue, 28 Jul 1992 19:40:24 GMT

I need a scsi card and a ethrnet card for my 3b2/400
I've made contact with some of you in the past but I've lost
touch...
so once again I'm after:

- a ethrnet card, the drivers and Tcp-ip if i can get it 
- a scsi card (and the drivers)


thanks...
-- 
David K Eggen        |      --Consultant at large--
dke@epx.cis.umn.edu  | You will be remembered only by the problems 
(612) 488 4014       | you solve and the problems you create!
From: pete@othello.dartmouth.edu (Pete Schmitt)
Newsgroups: comp.sys.att
Subject: 3B2/400 Booting problem
Date: 23 Jul 92 18:43:34 GMT
Organization: Dartmouth College, Hanover, NH

I am still have some trouble getting a terminal to show anything when
trying to boot a 3B2/400.  I now have a vt220 as a console.  The cable
that is connected to the back of the vt220 has a modular adapter that
is labeled with terminal/printer. Is this the correct adapter?

The speed of the terminal is set to 9600 8bit No parity 1stop bit.

The terminal does work as it was tested on another system, although
not another 3B2, (the same cable was/could not be used).

When the system is turned on, you hear the fan start spinning, and the
floppy light go on then off, the power and diagnostic lights are both
on for about 2-3minutes and then the diagnostic light goes out.

Nothing happens on the terminal screen.  Is the system dead or is
my hookup incorrect??

-pete

--
Peter Schmitt, UNIX Systems Specialist, Computing Services, Dartmouth College
Email: peter.schmitt@dartmouth.edu                        Phone: 603-646-2085
******* Let us not give up meeting together, as some are in the habit *******
******* of doing, but let us encourage one another.    -Hebrews 10:25 *******
From: tr@samadams.princeton.edu (Tom Reingold)
Newsgroups: comp.sys.att
Subject: Re: Virtual Terminal SV/386 R3.2.2
Date: 28 Jul 92 01:08:20 GMT
Organization: Noo Joizy, USA

pjh@mccc.edu (Pete Holsberg) writes:

$ Hmmm...here's the part of the readme from screen3:

$ "screen" is a window manager that allows you to handle several independent
$ screens (UNIX ttys) on a single physical terminal; each screen has its own
$ set of processes connected to it (typically interactive shells).  Each
$ virtual terminal created by "screen" emulates a DEC VT100 plus several ANSI
$ X3.64 and ISO 2022 functions (including DEC VT102 features such as line and
$ character deletion and insertion).

$ Since "screen" uses pseudo-ttys, the select system call, and UNIX-domain
$ sockets, it will not run under a system that does not include these
$ features of 4.2 and 4.3 BSD UNIX.

And since TCP/IP adds these BSD features to SysVR3, you are ready to
compile screen once you buy a TCP/IP add-on package.

To tell the truth, I don't know if my configuration uses Berkeley
sockets.  My system does have these sockets available but I don't know
if my configuration of screen uses them.  I did write the config file,
and I told it that I have named pipes, so screen may use them instead
of BSD sockets.  Then again it may not, but you should get them when
you get TCP/IP.

I cannot imagine using a character-based display without using
screen.  This is doubly essential when you don't have BSD job control.
I often start something and subsequently decide that I want it in the
background.  With screen, I can leave a process intact just by invoking
a new window.

I realize this sounds like proselytizing, but GET SCREEN!
--
        Tom Reingold
        tr@samadams.princeton.edu  OR  ...!princeton!samadams!tr
        "Warning: Do not drive with Auto-Shade in place.  Remove
        from windshield before starting ignition."
From: pjh@mccc.edu (P. J. Holsberg)
Newsgroups: comp.sys.att
Subject: BSD/Linus for UNIX PC????
Date: 31 Jul 92 15:15:35 GMT
Organization: The College on the Other Side of U. S. 1

Idle thought: wouldn't it be wonderful if someone ported BSD and/or
Linux to the UNIX PC??? Maybe someone has???

Hopefully,
Pete
Newsgroups: comp.sys.att
From: tr@samadams.princeton.edu (Tom Reingold)
Subject: Re: Virtual Terminal SV/386 R3.2.2
Organization: Noo Joizy, USA
Date: 27 Jul 92 20:02:25 GMT

pjh@mccc.edu (Pete Holsberg) writes:

$ Modem port.

$ I thought that screen required facilities not present in AT&T SV/386
$ R3.2.2 UNIX (sockets? pttys? ??). Is that not so? Does screen recognize
$ "hot keys"?

Yes, screen requires a minimum of ptty's and the select() system call.
I was able to port screen to a 3B2 running SysVR3.1 since the TCP/IP
add-on package puts these things in the kernel.  Do you have TCP/IP on
your 386UNIX system?
--
        Tom Reingold
        tr@samadams.princeton.edu  OR  ...!princeton!samadams!tr
        "Warning: Do not drive with Auto-Shade in place.  Remove
        from windshield before starting ignition."
Newsgroups: comp.sys.att
From: pjh@mccc.edu (Pete Holsberg)
Subject: Re: Virtual Terminal SV/386 R3.2.2
Organization: The College On The Other Side Of Route One
Date: Thu, 30 Jul 1992 18:17:29 GMT

In article <tr.712285700@samadams> tr@samadams.princeton.edu (Tom Reingold) writes:
=And since TCP/IP adds these BSD features to SysVR3, you are ready to
=compile screen once you buy a TCP/IP add-on package.

Do you have any suggestions as to the least expensive TCP/IP package I
can buy that will add the needed features?

=I cannot imagine using a character-based display without using
=screen.  This is doubly essential when you don't have BSD job control.
=I often start something and subsequently decide that I want it in the
=background.  With screen, I can leave a process intact just by invoking
=a new window.

And you do that with "hot keys"??

=I realize this sounds like proselytizing, but GET SCREEN!

I don't mind a little enthusiasm; I will if we can dig up some gelt for
TCP/IP!

Pete
Xref: sparky comp.sys.att:1927 u3b.misc:30
From: friedl@mtndew.Tustin.CA.US (Stephen Friedl)
Newsgroups: comp.sys.att,u3b.misc
Subject: for sale: AT&T 3B2/622
Date: 29 Jul 92 22:07:48 GMT
Followup-To: comp.sys.att
Organization: Steve's Personal machine / Tustin, CA


Hi folks,

     A customer of mine has a 3B2/622 that he wants to sell and
asked me to post this to the net.  I've omitted the obvious stuff
that comes with all 3B2 machines:

	> AT&T 3B2/622 (a model /600 with the 22MHz field upgrade)
	> 24 MB main memory (16 + 4 + 4)
	> 2 * 155MB internal single-ended SCSI drives
	> 2 * 322MB external differential SCSI drives w/ cabinet
	> differential SCSI host adaptor for above
	> 4 * EPORTS cards
	> all appropriate cables
	> UNIX 3.2.1 software
	> C software development set
	> 120MB QIC cartridge tape (SCSI)
	> eligible for AT&T maintenance

     Anybody interested should contact me and I'll put you in
touch with my customer (I'm not involved in the transaction
except for maybe getting a beer out of it).

     Thanks,
     Stephen

-- 
Stephen J Friedl | Software Consultant | Tustin, CA |     +1 714 544-6561
3b2-kind-of-guy  | I speak for me ONLY |   KA8CMY   | uunet!mtndew!friedl
 
We should re-arm the Russians as long as they promise to take out Washington
Newsgroups: comp.sys.att
From: hak@alf.cooper.edu (Jeff Hakner)
Subject: Attention: TONY WALTON
Organization: The Cooper Union ( NY, NY )
Date: Wed, 22 Jul 1992 02:00:08 GMT

TONY!

	We seem to have lost touch again.  I need to chat with you
re 3B2/400 memory and motherboard mods.  Drop me a line:
	hak@alf.cooper.edu


--Thanks!
--Jeff Hakner
	Systems Administrator
	Cooper Union School of Engineering
From: tr@samadams.princeton.edu (Tom Reingold)
Newsgroups: comp.sys.att
Subject: Re: Virtual Terminal SV/386 R3.2.2
Date: 27 Jul 92 02:27:18 GMT
Organization: Noo Joizy, USA

pjh@mccc.edu (P. J. Holsberg) writes:

$ /etc/inittab starts /etc/vtgetty console console.

$ Is it possible to run /etc/vtgetty for any other port? If so, how? I
$ looked at TFM but ...

What sort of port were you hoping to run virtual terminals from?  I am
fairly certain that they use a device driver that directly read the
keyboard and write to the video buffer.  This would not work over a tty
port.  If you want that sort of thing, run "screen" which has some
features over vtlmgr anyway.
--
        Tom Reingold
        tr@samadams.princeton.edu  OR  ...!princeton!samadams!tr
        "Warning: Do not drive with Auto-Shade in place.  Remove
        from windshield before starting ignition."
From: tr@samadams.princeton.edu (Tom Reingold)
Newsgroups: comp.sys.att
Subject: Re: Virtual Terminal SV/386 R3.2.2
Date: 31 Jul 92 01:27:37 GMT
Organization: Noo Joizy, USA

pjh@mccc.edu (Pete Holsberg) writes:

$ Do you have any suggestions as to the least expensive TCP/IP package I
$ can buy that will add the needed features?

No, I don't do that sort of purchasing normally.  I have bought AT&T
stuff from ECCS, but they are probably not a bargain vendor.  For all I
know, you might be able to get the KA9Q implementation of TCP/IP for
free off the net.  I don't know if this adds the requisite things we've
been talking about in the same way Wollongong TCP/IP does.

$ =I cannot imagine using a character-based display without using
$ =screen.  This is doubly essential when you don't have BSD job control.
$ =I often start something and subsequently decide that I want it in the
$ =background.  With screen, I can leave a process intact just by invoking
$ =a new window.

$ And you do that with "hot keys"??

Screen uses two-character control character sequences, usually starting
ctrl-a, but it's all user configurable.  Screen is a way to get virtual
terminals on regular old character based displays with no special
device support.
--
        Tom Reingold
        tr@samadams.princeton.edu  OR  ...!princeton!samadams!tr
        "Warning: Do not drive with Auto-Shade in place.  Remove
        from windshield before starting ignition."
Newsgroups: comp.sys.att