HDTenEightyP/NetNews huggingface dataset:
From: sjp@camcon.co.uk (Steve Pearce)
Newsgroups: comp.realtime
Subject: Re: OS/2 experience?
Keywords: Looking for information on OS/2
Date: 6 Nov 92 16:53:50 GMT
Organization: Cambridge Consultants Ltd., Cambridge, UK

meek@fizzy.csu.murdoch.edu.au (Lindsay Meek) writes:

>Hello,
>	I'm thinking of using OS/2 for process control and I'm wondering
>whether it can be relied apon to schedule high priority tasks at some
>sort of deterministic time interval. 
>	Does anybody know whether this is possible? and If not, can an
>interrupt service routines be used to get around the OS/2 scheduler?
>Thanks
>	Lindsay Meek

OS/2 user-programmable event timer routines are ok for approximate scheduling 
activities, but they are limited by being tied to the timer-tick interrupt
which runs at 31msec intervals, (~32Hz), intervals of less than a couple of 
hundred msecs are too inaccurate for serious real time work.

Interrupt service routines have to be written as OS/2 device drivers as OS/2 
runs in protected mode.  To provide a fast, accurate timer you will need 
additional hardware containing a counter/timer chip clocked at a sensible 
rate.  Look for an adapter card with OS/2 support.

When programming real time applications in OS/2, be careful not to over-rely
on system services such as semaphores and shared memory.  These can take a
large processing chunk out of tight timing loops, especially in <486 systems.


OS/2 is suitable for real time applications and it has the benefit of 
supporting lots of other PC applications as well.


Steve Pearce                       | sjp@uk.co.camcon
Systems & Engineering Applications | 
Cambridge Consultants              | Tel: (int +44) (0)223 420024
Science Park                       | Fax: (int +44) (0)223 423373
Cambridge                          |
From: dstewart+@cs.cmu.edu (David B Stewart)
Newsgroups: comp.realtime
Subject: Need Charter for this newsgroup
Date: 8 Nov 92 20:27:11 GMT
Article-I.D.: cs.BxEzHC.70M.1
Reply-To: dstewart@cmu.edu
Organization: The Robotics Institute, Carnegie Mellon University


We are trying to set up a FAQ for this newsgroup. We would like to get
hold of the official charter; however, the USENET administrators do not
have it quickly available.  If you have a copy of that charter, please
send it to me.

Thanks,

~dave

-------------------------------------------------------------------------------
David B. Stewart  - email: <dstewart@cmu.edu>            The Robotics Institute
snail mail:       - ECE Dept., Carnegie Mellon University, Pittsburgh, PA 15213
Current Projects: - Chimera 3.0 Real-Time Operating System
		  - Reconfigurable Sensor-Based Control Systems
From: carata@hpuircz.italy.HP.COM (Carlo ARATA)
Date: Fri, 6 Nov 1992 13:19:16 GMT
Subject: Re: Searching feedback on realtime OS
Organization: HP Italian Response Center
Newsgroups: comp.realtime

/ hpuircz:comp.realtime / eb@felix.Sublink.Org (Enrico Badella) /  9:06 am  Nov  3, 1992 /
As the subject states I'm looking for some feedback on realtime OSes.

I've been looking around on the market and found quite a bit of
realtime OS; as usual all the literature is biased and the main
difference between the objects is price. As you can imagine I cannot
afford to try them out all due to time and monetary constraints.

I have focused on the following OS:

	OS/9, LynxOS, pSOS, VxWorks

and a bit less on VRTX. My preference will go to all those OSes
that have a Un*x like programming interface so that applications
can be developed on our Suns without having to learn a new API.

The hardware platform is unknown and can be a 486 PC using LynxOS
or a 68xxx VME; I personally prefer this last choice for reliability
and expandibility but it could be overridden by it's cost.

The whole `thing' will be used to process around 20 analog channels
that carry info from pressure sensor and thermocouples; the maximum
sample rate should be less than 10KHz.

If you have used any of the mentioned Oses or know of others I missed
and are willing to share your knowledge please do.

I'll post a summary of my findings.

Just a last note, since I have a terribly unreliable news feed please
CC: your answers to eb@icnucevx.cnuce.cnr.it.

Thank you


-- 
Enrico Badella				Internet: eb@felix.sublink.org
Soft*Star s.r.l.			          eb@icnucevx.cnuce.cnr.it
Via Camburzano 9			Phone:    +39-11-746092
10143 Torino, ITALY			Fax:      +39-11-746487
----------
Newsgroups: comp.realtime
From: feuling@astroatc.uucp (Lindsay Feuling)
Subject: Solaris questions, three of them
Keywords: binaries, X11
Organization: Astronautics Technology Cntr, Madison, WI
Distribution: na
Date: Fri, 6 Nov 1992 17:01:10 GMT

1) I've seen a little bit of info about Solaris, RTOS for the Sun, and was
just curious to know if the executables would be compatible if originally
compiled on SunOS 4.1.  IE. If I compiled a program on SunOS 4.1, would
I be able to run it on Solaris?

2) Also, I would be interested to know if GNU C/C++ has a port to Solaris.

3) And finally, I am intending on running X11 Windows on my platform with
	Solaris.  has anyone out there used X-Windows in real-time?  What
	sort of limitations have come up?  

Thanks in advance.
Lindsay Feuling
Software Engineer.

Newsgroups: comp.realtime
From: eletanjm@nuscc.nus.sg (Tan Jin Meng)
Subject: Re: OS/2 experience?
Organization: National University of Singapore
Date: Sat, 7 Nov 1992 16:53:55 GMT

hansen@deci.cs.umn.edu (David M. Hansen) writes:
: Doesn't OS/2 use virtual memory (i.e. swapping to disk)?  If so, it would 
: probably be wise to turn this feature off, if possible.  Otherwise, you may
: introduce unpredictable non-deterministic (albiet generally short) delays in
: your program, just by executing the next instruction...

Yes you can turn it off. As a related note, if you junk the GUI and just
use the basic OS services, the OS + app can probably fit into 4 to 8MB
of physical memory. 

jin meng
Newsgroups: comp.realtime
From: frazier@kona.cs.ucla.edu (Gregory Frazier)
Subject: Re: Wirelses Comunication
Organization: UCLA, Computer Science Department
X-Newsreader: Tin 1.1 PL5
Date: Wed, 11 Nov 92 21:12:34 GMT

George Haber (hendrix@haber.Eng.Sun.COM) wrote:
: Hi Guys and Girls
: =================
: 
:   I need some HELP "please"

:         - What is the best protocol for this ??

I don't know what your realtime requirements are, but I
suggest looking for references to the "ALOHA" protocol.

--
"They thought to use and shame me but I win out by nature, because a true
freak cannot be made.  A true freak must be born." - Geek Love

Greg Frazier	frazier@CS.UCLA.EDU	!{ucbvax,rutgers}!ucla-cs!frazier
From: alfredb@pogo.wv.tek.com (Alfred Brown)
Newsgroups: comp.realtime
Subject: Re: VME Setups
Date: 9 Nov 92 01:54:40 GMT
Reply-To: alfredb@pogo.WV.TEK.COM
Organization: Tektronix, Inc. Wilsonville

In article <y5ZXr*Va1@xpresso.UUCP>, bill@xpresso.UUCP (Bill Vance) writes:
> Can anyone Tell me the names of any good books on the subject of setting up
> a VME system?  I need the why's and wherefores of setting up the bus jumpers
> and anything else needed to get a system up and running.  Thanks in advance.
> 

I recommend "The VMEbus Handbook: A User's Guide to the IEEE 1014 and IEC 821
Microcomputer Bus", by Wade D. Peterson, VMEbus International Trade Assoc.
(VITA), 1989.

-- 
Alfred Brown, Sr. Software Engineer, Graphics Printing & Imaging Division,
Tektronix, Inc.  P.O. Box 1000  MS 63-424  Wilsonville, Oregon  97070-1000
Ph:(503) 685-3698      FAX:(503) 682-1183  email: alfredb@pogo.wv.tek.com
disclaimer: I do not speak for Tektronix, Inc.,  nor does it speak for me.
Xref: sparky comp.realtime:1323 sci.electronics:18726 comp.sys.ibm.pc.hardware:29519
From: rpb@psy.ox.ac.uk (Ray Bellis)
Newsgroups: comp.realtime,sci.electronics,comp.sys.ibm.pc.hardware
Subject: HCTL-1000 Axis controller board required for IBM-PC
Date: 11 Nov 92 11:30:08 GMT
Organization: Dept. of Experimental Psychology, Oxford, England.


I'm looking for an ISA bus card based on the Hewlett Packard
HCTL-1000 series axis/motion controller integrated circuit.

If anyone knows of such a product, preferably with distributors
in the UK please contact me at the address below.

Many thanks,

Ray.
--
------------------------------------------------------------------------------
R. P. Bellis				E-Mail:	<rpb@psy.ox.ac.uk>
Dept. of Experimental Psychology	Whois:	(RB83)
University of Oxford			Tel:	+44 865 271419
South Parks Road			Fax:	+44 865 310447
Oxford OX1 3UD
------------------------------------------------------------------------------
Newsgroups: comp.realtime
From: hansen@deci.cs.umn.edu (David M. Hansen)
Subject: Re: OS/2 experience?
Keywords: Looking for information on OS/2
Organization: University of Minnesota
Date: Fri, 6 Nov 1992 19:34:02 GMT

In article <25418@io.camcon.co.uk>, sjp@camcon.co.uk (Steve Pearce) writes:
|> meek@fizzy.csu.murdoch.edu.au (Lindsay Meek) writes:
|> 
|> >Hello,
|> >	I'm thinking of using OS/2 for process control and I'm wondering
|> >whether it can be relied apon to schedule high priority tasks at some
|> >sort of deterministic time interval. 
|> >	Does anybody know whether this is possible? and If not, can an
|> >interrupt service routines be used to get around the OS/2 scheduler?
|> >Thanks
|> >	Lindsay Meek
|> 
|> OS/2 user-programmable event timer routines are ok for approximate scheduling 
|> activities, but they are limited by being tied to the timer-tick interrupt
|> which runs at 31msec intervals, (~32Hz), intervals of less than a couple of 
|> hundred msecs are too inaccurate for serious real time work.
|> 
|> Interrupt service routines have to be written as OS/2 device drivers as OS/2 
|> runs in protected mode.  To provide a fast, accurate timer you will need 
|> additional hardware containing a counter/timer chip clocked at a sensible 
|> rate.  Look for an adapter card with OS/2 support.
|> 
|> When programming real time applications in OS/2, be careful not to over-rely
|> on system services such as semaphores and shared memory.  These can take a
|> large processing chunk out of tight timing loops, especially in <486 systems.
|> 
|> 
|> OS/2 is suitable for real time applications and it has the benefit of 
|> supporting lots of other PC applications as well.

Doesn't OS/2 use virtual memory (i.e. swapping to disk)?  If so, it would 
probably be wise to turn this feature off, if possible.  Otherwise, you may
introduce unpredictable non-deterministic (albiet generally short) delays in
your program, just by executing the next instruction...

					-=Dave

Disclaimer: I don't know, I've never used it.
From: koot@prl.philips.nl (Sjaak Koot)
Newsgroups: comp.realtime
Subject: Embedded vs Workstation world
Summary: Info on embedded vs. workstation world wanted
Keywords: embedded
Date: 5 Nov 92 09:43:24 GMT
Organization: Philips Research Laboratories Eindhoven, Netherlands


Hi,


I am looking for some references on the characterization of embedded
systems, preferably on hard- and software. Are there any introductory books ?
Questions I have are:
- Can I use normal benchmarks (SPECMARK, Dhrystone etc.) to get some performance
  figures for embedded hardware"
- How do embedded applications differ from other applications, branching freq.,
  data / instr. referencing, register usage  (do they differ ?)
- What are common techniques for interfacing
- How do real-time systems and embedded systems relate (are all embedded systems
  real-time) ?
etc. etc.
I want to get some information on the main differences between the workstation 
world and the embedded world.

Greetings,
Sjaak Koot.
From: casey@asi.com (Casey Bahr)
Newsgroups: comp.realtime
Subject: Info on ITRON?
Date: 13 Nov 92 17:50:18 GMT
Article-I.D.: asi.1992Nov13.175018.10218
Distribution: usa
Organization: Adaptive Solutions, Inc.,  Beaverton Oregon

Does anyone have any information on a realtime kernel
called ITRON? 

Apparently it's very popular in Japan, according to one of
our business partners and I'd like to find out more about it.
I don't recall having seen it in any recent realtime OS vendor 
lists in this group (but then again I don't follow this group as
closely as I'd like).

Any information would be greatly appreciated.  Please send 
replies to my e-mail address below, unless you feel it might
have general interest.  Thanks!


Casey Bahr  
casey@asi.com | ogicse!adaptive!casey | uunet!adaptive!casey 
Adaptive Solutions, Inc., 1400 NW Compton Dr. Suite 340, Beaverton, OR 97006  
VOICE: (503) 690.1236 /\/\/\/\/\/\/\o\/o/\/\/\/\/\/\/\/\ FAX: (503) 690.1249
From: amf@amfent.Gwinnett.COM (Andy Feibus)
Newsgroups: comp.realtime
Subject: Re: POSIX 1003.4
Date: Fri, 13 Nov 92 09:18:50 EST

hansen@snll-arpagw.llnl.gov (hansen fred r) writes:
> In article <MIYA.92Nov10163638@gizmo.cis.canon.co.jp> miya@cis.canon.co.jp (T
> >	I would like to get POSIX 1003.4 (reatime extension) Draft-12. 
> >	Please let me know a ftp site or a publisher by e-mail.
> Please post the answer to this question.  I'm sure many of us would be
> interested 
Contact the IEEE-USA Customer Service Center at 800-678-4333 (908-981-1393
for outside of 800 zone).

Cheers!
-- Andy.

------------
Andy Feibus.
AMF Enterprises / Open Systems Today / SCO Magazine    (whatever :-)
andyfe@utoday.com
From: miya@cis.canon.co.jp (Tsuyoshi Miyamoto)
Newsgroups: comp.realtime
Subject: RE:P1004.3
Date: 13 Nov 92 09:10:25 GMT
Distribution: comp
Organization: Canon inc., Kawasaki, Japan

Dear real-time netters,

I recieved the following e-mail from Steve Brosky
<steve@amber.ssd.csd.harris.com>.

> you can order P1003.4 from the IEEE standards office:
>
> Anna Kaczmarek
> IEEE Standards Office
> P.O. Box 1331
> 445 Hoes Lane
> Piscataway, NJ 08855
>
> phone:
> (908)562-3811
>
> It is not available via ftp.

I am sorry that I didn't post above immediately. 
I am waiting for the another reply.

Best Regards,

Tsuyoshi Miyamoto
Interconnectivity Development Center
CANON Inc.
e-mail:miya@cts.canon.co.jp
From: miya@cis.canon.co.jp (Tsuyoshi Miyamoto)
Newsgroups: comp.realtime
Subject: POSIX 1003.4
Date: 10 Nov 92 07:36:38 GMT
Organization: Canon inc., Kawasaki, Japan

Dear Real-Time netters,

	I would like to get POSIX 1003.4 (reatime extension) Draft-12. 
	Please let me know a ftp site or a publisher by e-mail.

Best Regards,

Tsuyoshi Miyamoto
Interconnectivity Development Center
CANON Inc.
e-mail:miya@cts.canon.co.jp
	or
       miya@cis.canon.co.jp
From: hansen@snll-arpagw.llnl.gov (hansen fred r)
Newsgroups: comp.realtime
Subject: Re: POSIX 1003.4
Date: 11 Nov 92 22:11:59 GMT
Organization: Sandia National Labs, Livermore, CA

In article <MIYA.92Nov10163638@gizmo.cis.canon.co.jp> miya@cis.canon.co.jp (Tsuyoshi Miyamoto) writes:
>Dear Real-Time netters,
>
>	I would like to get POSIX 1003.4 (reatime extension) Draft-12. 
>	Please let me know a ftp site or a publisher by e-mail.

Please post the answer to this question.  I'm sure many of us would be
interested 

Fred Hansen

hansen@sandia.llnl.gov
Newsgroups: comp.admin.policy
From: peirce@gumby.cc.wmich.edu (Leonard J. Peirce)
Subject: Looking for info:  e-mail privacy/security legal stuff
Date: Tue, 10 Nov 1992 15:40:18 GMT
Organization: Western Michigan University Academic Computing Services

We're trying to revise some of our policies regarding e-mail and security
and as a result I'm trying to locate 

   1) the full text of the Electronic Communications Privacy Act of 1986
   2) the text of any other state/federal statues/court decisions that relate
      to e-mail privacy in particular and security in general

Any pointers to this will be greatly appreciated.  A summary will be forth-
coming if there is sufficient interest.

As always, thanks in advance.....

--
Leonard J. Peirce               Internet:  peirce@mickey.acs.wmich.edu
Western Michigan University                peirce@gw.wmich.edu
University Computing Services
Kalamazoo, MI  49008            Phone:     (616) 387-5469

Let us labor at thinking clearly; herein lies the source of moral conduct.
						- Pascal
Newsgroups: comp.admin.policy,alt.comp.acad-freedom.talk
From: jbotz@mtholyoke.edu (Jurgen Botz)
Subject: Re: What about child pornography?
Organization: Mount Holyoke College
Date: Tue, 10 Nov 1992 19:14:15 GMT

In article <BxIDtp.B9y@cs.uiuc.edu> kadie@cs.uiuc.edu (Carl M. Kadie) writes:
>The law seems to say that you are not reponsible for the distribution
>of material that can't and don't know about. (Without such law the
>First Amendment is almost worthless.)

Yes, but will that prevent the FBI or USSS from seizing all my computer
equipment as evidence should they decide to crack down on those who
distribute illegal pronography or other illegal material via the
computer networks?

--
Jurgen Botz                  |   Internet: JBotz@mtholyoke.edu
Academic Systems Consultant  |     Bitnet: JBotz@mhc.bitnet
Mount Holyoke College        |      Voice: (US) 413-538-2375 (daytime)
South Hadley, MA, USA        | Snail Mail: J. Botz, 01075-0629
Newsgroups: comp.admin.policy
From: davecb@nexus.yorku.ca (David Collier-Brown)
Subject: Re: What about child pornography?
Organization: York University
Date: Tue, 10 Nov 1992 19:42:58 GMT

kehres@ima.com (Tim Kehres) writes:
|Lets get real about this - either we are able to police ourselves, or several
|(many?) sites will join the ranks of those banning the erotic picture groups
|from their sites.  

  Alas, this isn't sufficient.  If you actively set out to select,
**you're responsible for whatever you do select**. 

  Right now I accept everything, without any conditions. I can therefor
claim I'm an innocent third party if someone uses news and my machines to
deliver anything (including state secrets), and can offer to help
track down the culprits, etc, etc.
  What I dare not do is start selecting/censoring/whatever, because by doing
so I accept responsability for what I let through...  something I
don't really want to do.
	

								There
|will not be any facist admins to blame this time around - only those foolish
|posters that could not control what they posted.


  I agree most strongly: let the poster beware (in his country, mind
you).

--dave
-- 
David Collier-Brown,  | davecb@CCS.YorkU.CA | lethe!dave
72 Abitibi Ave.,      | Oh ye who lead / Take Heed,
Willowdale, Ontario,  | Blindness we may forgive,
CANADA. 416-223-8968  | But baseness we will smite.
Newsgroups: comp.admin.policy
From: dan@cubmol.bio.columbia.edu (Daniel Zabetakis)
Subject: Full mail spool policy?
Organization: Columbia University, Dept. of Biological Sciences.
Date: Thu, 5 Nov 1992 19:42:00 GMT


    We are having a problem with a full mail spool. Some users have
large amounts of mail kept there. I am pretty sure that much of it is
from mailing lists that they don't want to dump into thier account mbox,
but don't really want to delete. Well, it is going to have to go now.

   My question in regard to policy is whether it is OK to threaten to
remove the mail. I intend to write to the active users by e-mail and ask
them to remove excessive mail (or explain why it is neccessary to keep
it). If they fail to respond to a reasonable attempt, I intend to delete
the mail. (probably won't happen).
   The real question comes up for the occasional users. Some people only
log on every few months, if that. I don't want to have to track them
down and explain the problem to them individually. How much effort should
I take to get in contact with them before deleting the mail as unwanted.
We don't often remove accounts (being a depertmental machine with not too
many users).

   What about runaway mailing lists? I think some of our users who don't
log in often have joined mailing lists, but never read the mail. Can I
look at the mail to determine if this is the case? What should I do if it
is?

DanZ

-- 
This article is for entertainment purposes only. Any facts, opinions,
narratives or ideas contained herein are not necessarily true, and do
not necessarily represent the views of any particular person.
From: tma4@ns1.cc.lehigh.edu (TERRY MICHAEL AUSPITZ)
Newsgroups: comp.admin.policy
Subject: Getting a site name
Date: 13 Nov 92 19:02:25 GMT
Organization: Lehigh University

Hi. At the risk of a FAQ, here goes:
How do I go about getting myself a site name? I run a BBS, Milliways BBS, and
would like to make it accessible through the nest (especially since I am a
student at Lehigh University and we have Internet access here).  If I'm
posting to the wrong place, please direct me to the right place.  If you can
help me, please do. Thanks again!
    -Zaphod (tma4@lehigh.edu)
-- 
          ///   ///    ///////                 -=FORTY-TWO=-
         ///   ///   /////////         We *ARE* The meaning of life!
        //////////  //   ///     << TMA4@LEHIGH.EDU -=- SES3@LEHIGH.EDU >>
       //////////      ///           Terry Auspitz        Sarai Spohn
            ///      ///            Stephanie Ridley       Matt Peck
           ///     ////////      << SLR7@LEHIGH.EDU -=- MRP2@LEHIGH.EDU >>
          ///    /////////        "So long, and thanks for all the fish."
Newsgroups: comp.admin.policy
From: mfriedma@uucp (Michael Friedman)
Newsgroups: comp.admin.policy
Subject: Re: Wanted: Policy for virus protection
Date: 10 Nov 92 19:57:06 GMT
Organization: Oracle Corporation
X-Disclaimer: This message was written by an unauthenticated user
              at Oracle Corporation.  The opinions expressed are those
              of the user and not necessarily those of Oracle.

In article <BwJ4H3.1Jp@rice.edu> jaw@owlnet.rice.edu (Joseph A. Watters) writes:
>In article <mumble>, fein@epg.nist.gov (Aaron Fein) writes:
>|> I am trying to establish a policy regarding downloading software 
>|> from the outside and find that I am walking a very fine line between
>|> protecting our system and limiting the "freedom and creativity" of 
>|> those who use the system.

>Please help me out here.  You work for NIST, so presumably do your
>users.  Correct me if I'm wrong, but it seems to me that unless a user
>has a work related reason to be downloading code, they shouldn't be
>doing it in the first place.  These are agency systems, meant to be
>used for agency business, not personal "freedom and creativity" for
>everyone on the system.

Arguable...

>Also, correct me if I'm wrong here, it seems that those few people who
>might have a valid, work related reason to be downloading source code
>would (should) also be sophisticated enough to look for trapdoors or
>trojan horses, and would also be involved in and concerned enough about
>system security to do source code audits on anything that they plan to
>compile from downloaded code.

You are wrong.  Just for example, how many man days do you think the
NIST should allocate to doing a source code audit of Emacs?  Even if
they did such an audit, do you really think they would find a larege
percentage of the security holes in the product?


-- 
-------------------------------------------------------------------------------
I am not an official Oracle spokesman.  I speak for myself and no one else.
Xref: sparky comp.admin.policy:1498 news.admin.policy:284 alt.comp.acad-freedom.talk:3368