headers
David Given | 22 May 2013 19:24

Current VCS?

I have a hardware project for which I need a simple operating system
that works without an MMU, and Prex would seem to be a decent candidate.
While I'm aware that the Sourceforge site isn't receiving updates any
more, has anyone been doing any work on Prex and happen to have a DVCS
site with updates in it?

-- 
┌─── ｄｇ＠ｃｏｗｌａｒｋ．ｃｏｍ ─────
http://www.cowlark.com ─────
│
│ 𝕻𝖍'𝖓𝖌𝖑𝖚𝖎 𝖒𝖌𝖑𝖜'𝖓𝖆𝖋𝖍
𝕮𝖙𝖍𝖚𝖑𝖍𝖚 𝕽'𝖑𝖞𝖊𝖍
𝖜𝖌𝖆𝖍'𝖓𝖆𝖌𝖑 𝖋𝖍𝖙𝖆𝖌𝖓.
│

------------------------------------------------------------------------------
Try New Relic Now & We'll Send You this Cool Shirt
New Relic is the only SaaS-based application performance monitoring service 
that delivers powerful full stack analytics. Optimize and monitor your
browser, app, & servers with just a few lines of code. Try New Relic
and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may
_______________________________________________
Prex-devel mailing list
Prex-devel <at> lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/prex-devel
Permalink | Reply | 1 comment |
headers
Gustavo Luiz Pasqualini | 15 Mar 2013 01:44
Picon

Contact - Prex

Hello,

I am a student of Masters in Mechatronics by IFSC (Federal Institute of Science and Technology).

My research includes testing different RTOS (hard and soft) in order to determine which best responds to
certain events of mechatronic systems and give a comparative result of these activities and performance
time control and supervision.

The ideia is to load in the same hardware these compatibles RTOS. The plataform is the Kit Luminary
lm3s8962(Stellaris Arm Cortex - Texas) and after make the tests.

My doubt is whether the license of the RTOS that you develop, and allows comparative study such as this
survey will become part of the library and maybe future projects with public access.

Do you have any material / documentation / articles / monographies about this RTOS for i attach in my work?

Best Regards,
Gustavo
------------------------------------------------------------------------------
Everyone hates slow websites. So do we.
Make your web apps faster with AppDynamics
Download AppDynamics Lite for free today:
http://p.sf.net/sfu/appdyn_d2d_mar
Permalink | Reply | 1 comment |
headers
alireza ghassemi | 22 Nov 2011 05:10
Picon

(no subject)

http://dnfhw.com/dF8SbpvO3qHUTsB/templets/hbbbs.htm

------------------------------------------------------------------------------
All the data continuously generated in your IT infrastructure 
contains a definitive record of customers, application performance, 
security threats, fraudulent activity, and more. Splunk takes this 
data and makes sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-novd2d
Permalink | Reply | 0 comments |
headers
Tony Garnock-Jones | 30 May 2011 13:38
Favicon
Gravatar

Exception handling bug

Hi all,

Prex on x86 has a bug in its exception handler. I've tried a couple of 
times to post this to the list, but each time it has been held back, so 
this time I'll try linking to a blog post I wrote about it instead:
http://www.eighty-twenty.org/index.cgi/tech/prex-bug-20110317.html

Regards,
   Tony

------------------------------------------------------------------------------
vRanger cuts backup time in half-while increasing security.
With the market-leading solution for virtual backup and recovery, 
you get blazing-fast, flexible, and affordable data protection.
Download your free trial now. 
http://p.sf.net/sfu/quest-d2dcopy1
Permalink | Reply | 0 comments |
headers
Elinam Hini | 28 May 2011 22:39

Arm based access point

Hey Guys,
What is the status of Prex, is it stable? I would like to use Prex to develop access points for a wireless
sensor node project. I am targeting technologic's TS-7552 and TS 7300 single board computers. The are ARM based.

Thanks,
Eli
------------------------------------------------------------------------------
vRanger cuts backup time in half-while increasing security.
With the market-leading solution for virtual backup and recovery, 
you get blazing-fast, flexible, and affordable data protection.
Download your free trial now. 
http://p.sf.net/sfu/quest-d2dcopy1
Permalink | Reply | 0 comments |
headers
Andrew Dennison | 12 Feb 2011 05:45
Picon

Re: Educational use?

Replying to the list too...

On 12 February 2011 14:48, Peter Desnoyers <pjd <at> ccs.neu.edu> wrote:
> On 02/11/2011 07:27 PM, Andrew Dennison wrote:
>> On 11 February 2011 14:46, Peter Desnoyers <pjd <at> ccs.neu.edu> wrote:
>>> I'm  using Prex in an operating systems class this term, and was
>>> wondering if anyone else had tried this.
>>>
>>> I was also wondering whether the project has gone dead, as there are
>>> very few messages on this list since last July.
>>
>> This sounds like a very good use of Prex, as it has a fairly clean
>> structure and good abstraction of the architecture specific
>> components.
>
> Yes, as a matter of fact my class just came up with a very good list of
> possible projects this morning.
>
> By the way, do you know if anyone has a good solution to debugging
> user-space code on MMU systems? It should be straightforward on NOMMU,
> but gdb e.g. through the QEMU stub is justifiably confused by the re-use
> of the same address space in every task. If there isn't anything, we
> have some ideas for a gdb stub that could be linked with an executable,
> and a couple of extensions to sys_debug.

Normally you would maintain a debug context for each process, and swap
the debug context as part of the task switch - the OS needs to
cooperate in this exercise. I've done this for some simple debug
support using the hardware debug support in our target processor: I'll
setup a gdb stub one day.
(Continue reading)

Permalink | Reply | 2 comments |
headers
Andrew Dennison | 12 Feb 2011 01:29
Picon

Fwd: Educational use?

On 11 February 2011 14:46, Peter Desnoyers <pjd <at> ccs.neu.edu> wrote:
> I'm  using Prex in an operating systems class this term, and was
> wondering if anyone else had tried this.
>
> I was also wondering whether the project has gone dead, as there are
> very few messages on this list since last July.

This sounds like a very good use of Prex, as it has a fairly clean
structure and good abstraction of the architecture specific
components.

The Prex mailing list has always been quiet, but there seem to be a
few of us lurking and ready to join in whenever some discussion
starts.

For the most part we're been just _using_ Prex for the last 6 months
or so, it is now nice and stable so our efforts have all been focused
on our product rather than more enhancements to Prex. Unfortunately I
can't comment on Prex 0.9, as I haven't yet found the time to merge
our changes with the latest release.

We haven't heard from Kohsuke for a while but I'm sure he is working
away adding some interesting features.

Andrew

------------------------------------------------------------------------------
The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE:
Pinpoint memory and threading errors before they happen.
Find and fix more than 250 security defects in the development cycle.
(Continue reading)

Permalink | Reply | 0 comments |
headers
Peter Desnoyers | 11 Feb 2011 04:46
Favicon

Educational use?

I'm  using Prex in an operating systems class this term, and was
wondering if anyone else had tried this.

I was also wondering whether the project has gone dead, as there are
very few messages on this list since last July.

--

-- 
.....................................................................
 Peter Desnoyers                                  pjd <at> ccs.neu.edu
 Northeastern Computer & Information Science

------------------------------------------------------------------------------
The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE:
Pinpoint memory and threading errors before they happen.
Find and fix more than 250 security defects in the development cycle.
Locate bottlenecks in serial and parallel code that limit performance.
http://p.sf.net/sfu/intel-dev2devfeb
Permalink | Reply | 1 comment |
headers
bifferos | 10 Jan 2011 12:17
Picon
Favicon

ne2000 ethernet driver

Hi all,

I just thought I'd mention I have ne2000 support added to my own small
IP stack in another project and thought it might be useful for Prex.  
I remember some time in a post long ago someone mentioning they'd be
prepared to port an IP stack to Prex so long as someone else wrote 
a driver.  I started looking at which was the simplest driver in 
Linux (ne2k), then removed all the parts that aren't needed for 
the Qemu emulated version by inspecting the Qemu sources, also 
removed interrupt support so you have to poll it.

All I've tested is that I can use the driver to do DHCP query and get an 
IP address back from Qemu, there could be plenty of bugs, but it's 
certainly helping me with my work, so thought I'd share it here.

The driver is C++ but in a C style, see attachment at the bottom of
the page:
http://sites.google.com/site/bifferboard/Home/rtos/grub-configuration-on-floppy-disk

Hopefully it's a trivial job to convert to C.

best regards,
Biff.

PS:  Consider the code to be in the public domain!

------------------------------------------------------------------------------
Gaining the trust of online customers is vital for the success of any company
that requires sensitive data to be transmitted over the Web.   Learn how to 
best implement a security strategy that keeps consumers' information secure
(Continue reading)

Permalink | Reply | 0 comments |
headers
Dave Skidmore | 10 Nov 2010 23:57
Picon

hello 123n

hello:
I have good news for you. Last week
I have Order china 16 Products Apple iPhone 4 HD 16GB Black
I completed  bank transfer payments,I have received the product!
w e b: tooaomo.com
It's amazing! The item is original, brand new and has high quality,
but it's muc cheaper. I'm pleased to share this good news with you!
I believe you will find what you want there and have an good experience
on shopping from them
Regards!

vcvcv        cv    蚀

------------------------------------------------------------------------------
Centralized Desktop Delivery: Dell and VMware Reference Architecture
Simplifying enterprise desktop deployment and management using
Dell EqualLogic storage and VMware View: A highly scalable, end-to-end
client virtualization framework. Read more!
http://p.sf.net/sfu/dell-eql-dev2dev
_______________________________________________
Prex-devel mailing list
Prex-devel <at> lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/prex-devel
Permalink | Reply | 0 comments |
headers
Richard PANDION | 1 Oct 2010 23:31

Re : Re: BeaglePort with MMU and CACHE

Hello all,

The diff file I posted yesterday does actually work on BeagleBoard RevB but not on BeagleBoard RevC.

I have posted a new diff (available at the same pastebin URL ==>http://pastebin.com/JV2Mipbq) which
fixes the issue and now works on both RevB and RevC boards. Thanks a lot to Yocto for his precious help
tracking down the issue.

Basically, it failed on BeagleBoard RevC because this board has a 2nd memory bank which start address spans
over memory bank 1 start address+4 MB and Prex ARM core cannot cope with this. Drop me a line if you want more details.

Please continue sharing your experiments with this new BeagleBoard port.

Cheers,

RICHARD

----- Message d'origine -----
De : Yocto
Envoyés : 01.10.10 01:03
À : rpandion <at> caramail.com, prex-devel <at> lists.sourceforge.net
Objet : Re: [Prex-devel] BeaglePort with MMU and CACHE

Hi> Please share your experiments with this patch!In order to build on CYGWIN, you need the following
changesto LIBGCC_PATH and PLATFORM_LIBS in mk/gcc.mk: LIBGCC_PATH := $(shell $(CC) $(CFLAGS)
-print-file-name=) PLATFORM_LIBS+= -L"$(LIBGCC_PATH)" -lgccWith these, your patch build Prex 0.9.0
and generate a 249670 bytes prexos.$ openssl dgst -md5 prexosMD5(prexos)=
2af3784c6d3bca3989d9be37d2d428c7But it hang after starting. [ CodeSourcery G++ lite 2007q3-53 ]ps: I
miss stuff like "--build=builddir/beagle" from Prex 0.8 that kept the dir clean... Do you have any news
for the release of Prex 1.0 ?Thanks// Yocto----- Original Message ----- From:
(Continue reading)

Permalink | Reply | 0 comments |

Gmane