HDTenEightyP/NetNews huggingface dataset:
From: alm@netcom.com (Andrew Moore)
Subject: Re: OS compare (Unix/clone)
Date: Fri, 24 Jul 92 09:32:21 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 

In article <michaelv.711923616@vincent1.iastate.edu> michaelv@iastate.edu (Michael L. VanLoon) writes:
>In <Brtsqr.Bq8@well.sf.ca.us> comeau@csanta.attmail.com (Greg Comeau) writes:
>
>>In article <1992Jul22.155542.27586@aie.nl> kim@aie.nl (Kim Schrijvers) writes:
>>>Can anyone tell me the pro and contras of the following operating systems, I
>>>would also like to know wether they support TCP/IP and C++, and wether they 
>>>run on an IBM/XT or not. I looked for a FAQ, but couldn't find one.
>

I don't know of any Unix that is currently supported on IBM-XT (i.e.,
Intel 8088 chip).  
On the 80286 (i.e., IBM-PC/AT): Xenix, Minix and Coherent 3.x 
On the 80386: Many Unixes, including, Coherent 4.0, Linux,
386BSD

>>>Coherent

    Best platform for learning how to use Unix.  It is easy to install
    and has excellent, easy to understand manual.  It is more forgiving
    than other Unixes.  Coherent 3.x runs only small models programs
    (and so it doesn't support many popular GNU programs like C++).
    32-bit Coherent 4.0 is now shipping and can handle large model (and
    GNU C++).  In addition, 4.0 can be used as an inexpensive
    development platform for SCO and some other Unixes - big plus!!  But
    networking (TCP/IP) won't be available for a while (along with
    virtual memory, shared libraries and other unimportant stuff...)

>>>Xenix

    SCO Unix.  Lots of device support and networking.  See the Unix
    Buyers guide article in the news.answers news group for a
    comparison of big commercial Unixes.

>>>Minix

    Standard for learning about operating systems, but probably not
    worth running otherwise (no TCP/IP, but probably has C++ maybe).

>>>Lunix

    Er.  Linux.  Quickly developing free System V-like system.  Flashy,
    but not particularly neophyte friendly.  Supports GNU C++.  Last I
    looked, only SLIP was working (Serial Line IP).  Non-networked X
    Windows is available.

386BSD

    Free BSD-like system.  Very complete.  TCP/IP, C++, multitude of
    file systems including NFS, X Windows, etc.  Not a lot of device
    support.
    -Andrew Moore <alm@netcom.com>


Newsgroups: comp.os.coherent
From: hcp@csx.cciw.ca (H.C. Pulley)
Subject: bug in my last program
Organization: Canada Centre for Inland Waters
Date: Sun, 26 Jul 1992 05:37:21 GMT


I found a bug in my last program.

In the section where it calculates the time spent logged in, the lines:
...
		else /* user logged out */
		{
			time_t difft;
			int hours,minutes;
...
			hours=(int) difft/3600;
...
			minutes=((int)difft%3600)/60;
...
must be changed to:
...
		else /* user logged out */
		{
			time_t difft;

			long hours,minutes;
...
			hours=(long) difft/3600;
...
			minutes=((long) difft%3600)/60;
...

I'll upload a corrected copy to Raven soon.

Harry

-- 
         hcp@csx.cciw.ca           | This message    | It takes all kinds,
   hcpiv@grumpy.cis.uoguelph.ca    | released to the | and to each his own.
-----------------------------------| PUBLIC DOMAIN.  | This thought in mind,
 Stay away from the DOS side Luke! |                 | I walk alone.
From: ben@bailey.UUCP (Ben Bailey)
Subject: Reading DOS partitions under 4.0
Newsgroups: comp.os.coherent
Date: 27 Jul 92 22:49:39 GMT
Distribution: world
Organization: Ben Bailey's Home..Tampa Fl.

Does anyone know if Coh 4.0 will be able to read large DOS partitions
(200 mbyte or larger)? 

If so, I would like to hear anyone thoughts to backing up to a DOS partition
or copying the dump files to a DOS partition so that I can get them over to the
Colorado Memory Systems tape drives for tape backups.  This waiting for 
a tape device driver is getting old, as is backing up to floppies.

Ben
--
Ben Bailey                 ben@bailey.uucp -- bailey!ben@uunet.uu.net
12210 Shady Forest Dr.     ben@bailey.tscs.com
Riverview, Fl. 33569       -- A programmer without his computer is like a 
813-677-5021                  boy without his dog.
From: dfp10@CSC.ALBANY.EDU (D Parsons)
Newsgroups: comp.os.coherent
Subject: Re: uustat command for Coherent 3.x
Date: 29 Jul 92 13:00:33 GMT
Reply-To: "Coherent operating system" <COHERENT@indycms.bitnet>
Organization: State University of New York at Albany

In article <9207270331.AA3470.V3.4@vger.chi.il.us> you write:
>I have just completed a System V - like uustat utility for Coherent version
>3.2.1.  It is my first attempt at writing a program for Coherent but it
>seems to work well.  I am now in the process of writing some documentation
>for it and will be making it available to anyone who is interested.  In
>addition, I will be uploading it to MWC as soon as I figure out how to do
>this.  If you would like a copy before then, send me email.
n:
D   Please send me a copy. Thanks.
>
>
>
>---
>Romel Aranas
>raa@chinet.chi.il.us
>romel@vger.chi.il.us


--

Donald F. Parsons MD, Wadsworth Ctr. Rm C273, NY State Dept of Health, ESP,
PO Box 509, Albany, NY 12201-0509. (518)474-7047 Fax: (518)474-7992
dfp10@uacsc2.albany.edu dfp10@albnydh2.bitnet Cis 71777,212
...!doh1c!paxsys!root
From: udo@umunk.GUN.de (Udo Munk)
Newsgroups: comp.os.coherent
Distribution: world
Subject: Re: Coherent 4.0
X-Newsreader: Tin 1.1 PL4
Organization: umunk (private)
Date: Thu, 23 Jul 92 22:07:57 +0100

Jeff.Tomich@psycho.fidonet.org (Jeff Tomich) writes:
: Just recieved my Coherent 4.0 upgrade offer. Can anyone tell me why I should upgrade and is there anything buggy about 4.0?

You should upgrade because you get a 32-bit flat address space operating
system. It doesn't have the 64KB limit from 3.x, so that you may run the
large programs like tin, nn, gcc, sc 6.11, elm and so on. It's very
compatible to System V, porting programs is much easyer. And it comes
with a lot of new things, like virtual consoles, ASYN driver for
higher serial port speed (up to 32). At last it is much faster then
3.x, fsck of my partitions and C compiler runs more than two times
faster than with 3.x.
--
Udo Munk     | voice:      +49 2131 275348             | uucp: +49 2131 278869
Oberstr. 21  | mail :      udo@umunk.GUN.de            |      2400/1200/300 8N1
4040 Neuss 1 | ...!{mcshh,smurf,unido}!easix!umunk!udo | MYNAME=bbsuser
Fed. Rep. of | CompuServe: 100021,2515                 | login: uucp
Germany      | at first connect get ~/info  and ~/files| pwd:   public
From: bob@allan.sublink.org (Lanfranco Albani)
Newsgroups: comp.os.coherent
Subject: Re: gnews and moderated newsgroups
Date: 17 Jul 92 20:51:33 GMT
Organization: Allan: where felines dance

kilroy@acme.gen.nz (earthbound misfit, I) writes:
> 
> Run C News. It's a pain to set up, but once it's going it's rock solid.
> 
[...]
> 
> It probably wouldn't be that tricky. I actually attempted trn on Coherent
> 3.2 a while back, but it's just too big. However, it appeared to be only the
> size that was the main concern.

I will be *VERY* happy with 4.0, when I wil be able to get the same
environment at home as at work: C-News, NN, Elm!

In my office I'm starting to use TRN to read the Sterling Software Net-News
CD-Roms.  It has a feature missing in Tass (if I havent made a fumble RTFMing):
exploding threads to see a menu of authors.

My favorite news-reader is always NN.  It's ability to mark interesting
articles and reading them only is a big feature (for me).


Anyone has some experience with TIN?

Bye, Lanfranco

--
_______________________#include <std_disclaimer.h>____________________________
Lanfranco Albani                                         bob@allan.sublink.org
Via Piretti 13                                       albani@cadlab.sublink.org
40012 Calderara di Reno (BO)                            FidoNet 2:332/407.1138
From: bill@glidden.UUCP (Bill Glidden)
Subject: Re: l lc lf lr ls lx confusion
Newsgroups: comp.os.coherent
Date: 31 Jul 92 02:18:26 GMT
Distribution: world
Organization: Bill Glidden's Home, Tampa FL

udo@umunk.GUN.de (Udo Munk) writes:
> messina@netcom.com (Tony Porczyk) writes:
> : 
> : Going through the Coherent flyer, I noticed the following commands
> : listed:
> : 
> : l	-	list dirs in a long format
> : lc	-	list dirs in a columnar format
> : lf	-	list dirs in a columnar format
> : lr	-	list subdirs in a columnar format
> : ls	-	list dirs contents
> : lx	-	list dirs in a columnar format
> : 
> : What in the world is this stuff?  Are these just aliased switches to ls?
> : There is a real ls with all the switches in there, right?
> : If these are just aliases, I don't find it too bright to list them in
> : "Coherent 386 Command Summary".
> 
> This are links to ls. Type ls -lai /bin/ls /bin/l /bin/lc ..... and
> you'll see it.

On what version of Coherent is this true? First of all, the only directory
list commands on my system are ls and lc. Secondly, they are NOT links, but
two separate executables. Am I missing something?

> --
> Udo Munk     | voice:      +49 2131 275348             | uucp: +49 2131 278869
> Oberstr. 21  | mail :      udo@umunk.GUN.de            |      2400/1200/300 8N1
> 4040 Neuss 1 | ...!{mcshh,smurf,unido}!easix!umunk!udo | MYNAME=bbsuser
> Fed. Rep. of | CompuServe: 100021,2515                 | login: uucp
> Germany      | at first connect get ~/info  and ~/files| pwd:   public

--
Bill Glidden             bill@glidden.uucp -- glidden!bill@uunet.uu.net
7516 Camarina Calle
Tampa, FL 33615         "Well is an absolute-it has no comparatives."
(813) 882-8369                      Kettle-Belly Baldwin
Newsgroups: comp.os.coherent,comp.os.minix
From: hp@vmars.tuwien.ac.at (Peter Holzer)
Subject: Re: OS compare (Unix/clone)
Organization: Technical University Vienna, Dept. for Realtime Systems, AUSTRIA
Date: Thu, 30 Jul 1992 11:53:53 GMT

evansmp@uhura.aston.ac.uk (Mark Evans) writes:

>I thought it was using a secondary storage medium such as a disk
>(or drum) to extend the addressing space of the processor.

Yes (although I'm not quite happy with the phrase `extend the
addressing space'. `Allow more or larger programs than fit in physical
memory (RAM)', is probably more accurate).  In the 286 every process
can have access to 8191 global and 8192 local segments, each of which
can have up to 64k. So the virtual address space of each process is
~1GB, which is far more than an AT has RAM (it is even more than a
286 can address).

If a segment is not needed, it can be swapped out onto disk. If it is
needed again (loaded into a segment register), the processor will raise
an exception, and the OS can load the segment into memory again. 

Seems to fit your definition.

Of course segments are harder to use than pages (they are of variable
size, which makes allocation harder, and leads to fragmentation; A far
pointer needs two registers, which makes the compiler more
complicated, ...), so people prefer paging MMUs, if they have the
choice.

>Am I not right in thinking that the memory protection on the 286 has a bug
>in it somewhere.

This is possible. I never did any protected mode programming on the 286
(and not much on the 386, either).
-- 
|    _  | Peter J. Holzer                       | Think of it   |
| |_|_) | Technical University Vienna           | as evolution  |
| | |   | Dept. for Real-Time Systems           | in action!    |
| __/   | hp@vmars.tuwien.ac.at                 |     Tony Rand |
Newsgroups: comp.os.coherent
From: besler@geop.ubc.ca (Steve Besler)
Subject: Re: OS compare (Unix/clone)
Reply-To: besler@geop.ubc.ca
Organization: Geophysics & Astronomy, U.B.C. Vancouver, Canada
Date: Tue, 28 Jul 1992 16:56:15 GMT

In article 920727594@tiny.com, sjsobol@tiny.com (Steven J. Sobol) writes:
>besler@geop.ubc.ca writes: (re. multi-processing OS's on XT's)
>
>>Well, it's nice to see that you stand by your statement, but you're WRONG.
>>Although it is not unix,  there is an OS for XT's and above called PC/GEOS
>>which has virtual memory and flat memory addressing. All this in a 70k kernel.
>>Throw in the Motif GUI that gets linked to it at boot-up time, and the fact
>>that it has pre-emptive multitasking and you get a system that kicks MicroSloth
>>Windoze in the head!   
>
>Great. Now where's the software for it?? :)
>Besides AOL's software and the integrated software that the same company
>sells (can't remember the name) ... there is none!!
>
>-- 
>***  **  ** | The Tiny Software Company/23707 Glenhill Dr./Cleveland, OH 44122
> *  *   *   |   Steven Sobol - President  - sjsobol@tiny.com or tiny!sjsobol 
> *   *  *   |   Alternate addresses: sjsobol@wariat.org or ag510@po.cwru.edu
> *    * *   | 
> *  **   ** | 


	Well, smarty-pants, the GeoWorks decided to wait for version 2.0 to 
release a full-featured Software Development Kit.  It will be out in 6 months 
or so.  But sorry, you are WRONG when you say that "... there is none"  There
are at least two other companies who are marketing programs for PC/GEOS.  
The lack of many third party apps is admittedly a problem, but that's not the 
point.  The original point of my post was to say that a multitasking PC environment
was entirely possible on an XT, and gave GEOS as an example.  Several unices that
worked on XTs were also posted by others.  So there!

	Steven Besler
 

Newsgroups: comp.os.coherent
From: mdj@mullian.ee.mu.OZ.AU (matthew douglas james)
Subject: Info about coherent 4.0
Organization: Computer Science, University of Melbourne, Australia
Date: Thu, 23 Jul 1992 05:05:17 GMT

I was wondering if someone could give me some info about the
changes with 4.0. The two major issues I was wondering about
are:

	I heard that 3.x could only build 64k segments and
	this was an impairment to building many standard UNIX
	progs (incl ANSI C compiler)

	Support for SCSI, and IDE Hard disks -  what's the
	current situation

Any advice, or general comments pro/con would be appreciated.

Thanks in advance
Matthew James

Newsgroups: comp.os.coherent
Subject: Re: Coherent 4.0 Release
From: cs.dal.ca!iisat!duncan!root  (David John Murdoch)
Organization: Duncan Computer Centre and Home Brewery
Date: Mon, 27 Jul 1992 00:47:05 GMT
Reply-To: root@duncan.UUCP (David John Murdoch)

In article <1335@pacsoft.com> mike@pacsoft.com (Mike Stefanik) writes:
>pacific.uucp!mkh@overmind.mind.org writes:
>: > I just got off the phone with MWC, 4.0 startes shipping today.
>: > 
>:     That's funny... I called today (two days after the above was posted),
>: and they told me it started shipping this afternoon. [...]
>
>That's funny... we just got mail here and Coherent said that they will
>start shipping 4.0 on August 3rd.

That's funny... so did I.

-- 
 __________________________________________________________________________
 David Murdoch * cs.dal.ca!iisat!duncan!djm * Halifax, Nova Scotia, Canada  
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Newsgroups: comp.os.coherent
From: thigpen@lambda.msfc.nasa.gov (Keith Thigpen)
Subject: Taylor UUCP
Summary: What's the scoop on Taylor UUCP?
Keywords: taylor uucp info request
Organization: NASA/MSFC
Date: Thu, 30 Jul 1992 19:55:44 GMT

I've seen several references to Taylor UUCP in this group lately.

What is the interest? Is it better than Coh UUCP? If so, how? I assume
that it is compilable under Coh 4, correct? Any additional info is
appreciated.

TIA
Keith

-- 
----------------------------------------------------------------------------
| Keith Thigpen          thigpen@lambda.msfc.nasa.gov      (205)461-4936   |
| New Technology, Inc.   Marshall Space Flight Center     Huntsville, AL   |
----------------------------------------------------------------------------
Newsgroups: comp.os.coherent
From: grante@aquarius (Grant Edwards)
Subject: Re: gnews and moderated newsgroups
Organization: Rosemount, Inc.
Date: Fri, 24 Jul 1992 18:17:11 GMT

bob@allan.sublink.org (Lanfranco Albani) writes:
: 
: My favorite news-reader is always NN.  It's ability to mark interesting
: articles and reading them only is a big feature (for me).
: 
: 
: Anyone has some experience with TIN?
: 

I've been using tin for about a year.  I used to use vn, and I like
tin much better.  At first it was hard to get used to the threadedness, but
now I would never use a non-threaded reader.

--
Grant Edwards                                 |Yow!  I'm receiving a coded
Rosemount Inc.                                |message from EUBIE BLAKE!!
                                              |
grante@aquarius.rosemount.com                 |
Newsgroups: comp.os.coherent
From: pershing@teal.csn.org (Paul Pershing)
Subject: Re: RFD: comp.unix.* reorganization
Organization: Colorado SuperNet, Inc.
Date: Sun, 26 Jul 1992 03:01:11 GMT


>Not trying to flame here, but using that old time worn phrase, "If it ain't
>broke, don't fix it." 

Absolutely! It is _fine_ the way it is! If I want to check out the latest
on Linux, I can do it without wading through a bunch of stuff on Minix,
Coherent, etc. Same goes for Coherent: I really don't want to sift material
that is only marginally related to my Coherent interests or questions.
The fact that these all "fall into the same *nix family" notwithstanding,
of course, I think the status quo is just fine.

Paul
]showdog![


-- 
------------------------------------------+----------------------------------- 
  Paul Pershing                           +  csn: pershing@csn.org                              
  Editorial Systems/Rocky Mountain News   +  nyx: ppershing@nyx.cs.du.edu                              
  Denver, CO (303) 892-2633               +  400 W. Colfax Denver CO 80204
Newsgroups: comp.os.coherent
From: marcelo@deadzone.princeton.edu (Marcelo Gallardo)
Subject: Re: FAQ anyone?
Date: Wed, 29 Jul 1992 03:00:27 GMT
Organization: DeadZone * A/UX 3.0 SVR2 * 609-275-1833

In <1992Jul26.113546.6457@jr.rhein-main.de> joachim@jr.rhein-main.de (Joachim Riedel) writes:

>There is already one Coherent FAQ. The actual keeper of the FAQ is
>Mike Willett ( mike@array.com ).
>He normally posts it monthly to this group.

	Thanks, I had it sent to me and I received it this morning at
	the office. I haven't had a chance to look through it as of yet,
	but chances are it doesn't have information regarding the 4.0
	release, which is what 80% of the traffic on c.o.c is now.

	I don't want to have two versions of an FAQ floating around, so
	maybe we can all pull together and update the FAQ.

	Marcelo -

-- 
Marcelo Gallardo			marcelo@deadzone.princeton.edu
Test and Evaluation Specialist		...!princeton!deadzone!marcelo
Princeton University			marcelo@Princeton.EDU
Advanced Technologies and Applications		(609) 258-5661
From: edi@edefix.han.de (E. v. Pappenheim)
Newsgroups: comp.os.coherent
Subject: Re: Info about coherent 4.0
Date: 28 Jul 92 22:27:11 GMT
Organization: Private

X-Newsreader: Tin 1.1 PL4

bill@glidden.UUCP (Bill Glidden) writes:
: udo@umunk.GUN.de (Udo Munk) writes:
: > 
: > 4.0 comes with a System V compatible cron.
: 
: By this, do you mean that there will be separate crontab files
: for each cron user? And that the uid of the process will be set
: to match the name of the crontab? I.e. /usr/spool/crontabs/root entries
: will be run as root and /usr/spool/crontabs/bill entries will be run 
: as bill?? (Hope so!)

Yes, you are right, and there is a 286 version avaliable from mwcbbs and
others

Ecki

: --
: Bill Glidden             bill@glidden.uucp -- glidden!bill@uunet.uu.net
: 7516 Camarina Calle
: Tampa, FL 33615         "Well is an absolute-it has no comparatives."
: (813) 882-8369                      Kettle-Belly Baldwin
-- 
------------------------------------------------------------------------
Eckebrecht von Pappenheim 	Eleonorenstr. 17        3000 Hannover 91
UUCP: edi@edefix.han.de			     Tel: (Voice) +49 511 443755
      ...!unido!horga!agsc!edefix!edi
------------------------------------------------------------------------
Newsgroups: comp.os.coherent
From: zesi.do.open.de!haug@overmind.mind.org
Newsgroups: comp.os.coherent
Subject: MWC distribution
Date: 21 Jul 92 00:44:00 GMT
Organization: private
X-mailer: Stadel 3.4a-227
X-Spam-content: irrelevant

Hi,

first excuse my faulty english! I havn't installed spell
because my harddisk is to small. I think you can understand
what i want to say, if not you can write me a mail. I'll
spend my few time to explain it.

Using credit cards for me is unsave. As far as i know, the 
company who has my creditcard number can get as mutch money
as it wants until my limit is reached. If they have my money
i see no change to get it back. And as far as i know, most things
are paid cache or with check in germany.

The price from the eMedia is not so bad. The update costs $60+$35 
*1.6=152DM from MWC and 169DM+6DM=175DM from eMedia. I called
eMedia and they told me that there is an update information if
MWC ships Coherent 4.0. The support is not so bad, eMedia has
made a short german installationguide (20p) for the 3.2 version.
I have not tested the telephone support.
But that's not the thing i want to point out. Coherent is cheap,
but it could be cheaper (1-5DM) if MWC gives the foreign support
to the national distributers. MWC can save all the oversea letters,
and i think it would be cheaper to ship a big package of copies
to the local distributer. My news was an information for the
german Coherent user and a hint for MWC to save money.

Haug


# save a tree and use e-mail
# haug@zesi.do.open.de Haug Buerger, Boemelburgstr.12, D-4600 Dortmund 50
From: raitano@EOLA.CS.UCF.EDU (Tony Raitano)
Newsgroups: comp.os.coherent
Subject: mwcbbs program
Date: 29 Jul 92 03:41:08 GMT
Reply-To: "Coherent operating system" <COHERENT@indycms.bitnet>
Organization: University of Central Florida, Orlando

I asked this on the net, and either no one answered or I missed it.  Where	can I
 get the mwcbbs program?  Can I uucp it from mwcbbs!/...  ? If so,
which directory is it under?  Thanks much
From: foster@nzkites.UUCP (Foster Schucker)
Newsgroups: comp.os.coherent
Subject: Coherent Software on a Mail Server
Date: 25 Jul 92 21:37:51 GMT
Organization: Kiteflyers Roost

I know that I can dial into MWC and use their BBS to obtain Coherent
software. Is there a net site that offers a mail server with Coherent
software?  From my remote leaf on the net, I don't have FTP access.  

Thanks!!

Foster Schucker



Foster Schucker  (foster@nzkites.uucp)  (1-215-458-8354 (voice))
Newsgroups: comp.os.coherent
From: rbean@netcom.com (William Chen)
Subject: using coherent to dial out
Date: Fri, 31 Jul 92 19:30:32 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 


	Using coherent's uucp facilities to access other uucp-able systems is
great, but is there any way for one to ... say call up a msdos bbs, compuserve,
etc.  Would it just be some program that allows terminal emulation access to
the modems?

-rbean
From: geoff@world.std.com (Geoff Collyer)
Newsgroups: comp.os.coherent
Subject: Re: C News (was Re: gnews and moderated newsgroups)
Date: 30 Jul 92 22:51:00 GMT
	<9207260813.30@rmkhome.UUCP> <1992Jul27.200244.2456@acme.gen.nz>
	<Bs0x7K.2pp@world.std.com> <9207291604.00@rmkhome.UUCP>
Organization: Software Tool & Die Netnews Research Center

Rick Kelly:
>Geoff, if you know of another sh clone that will do the job, I'm all ears.

I suspect that ash will be fixed suitably, since it's what BSDI ships as
/bin/sh.
Newsgroups: comp.os.coherent,comp.os.minix
From: hp@vmars.tuwien.ac.at (Peter Holzer)
Subject: Re: OS compare (Unix/clone)
Organization: Technical University Vienna, Dept. for Realtime Systems, AUSTRIA
Date: Wed, 29 Jul 1992 12:28:47 GMT

kwfriber@mtu.edu (Kenberg Frieth) writes:

>Also,
>[the 286] does not support virtual memory directly (although, one could probably
>do it in software).

How do you define `virtual memory'? The 286 does not have paging, but
segmentation is a form of virtual memory as well.

>  The 286 does have some memory protection, and does
>have protection levels for some instructions.

I had the impression that protection is very similar in the 286 and the
386. The latter just added page-level protection and the IO permission
maps.

-- 
|    _  | Peter J. Holzer                       | Think of it   |
| |_|_) | Technical University Vienna           | as evolution  |
| | |   | Dept. for Real-Time Systems           | in action!    |
| __/   | hp@vmars.tuwien.ac.at                 |     Tony Rand |