On 5 Feb 2007 16:23:16 -0800, ID@lawrencericci.com wrote:

>No all MS managed code is real time- for example the new Micro
>Framework is DEFINITELY not real time,  I have some links on my web
>page below.  Any questions- please SMS me at
>4108044290_AT_teleflip.com; I will get right back.

Then it must be highly unreliable :-)

By current definitions of realtime, the process must be executed in
the specified time, otherwise, the system is faulty.

The 1960's airline ticket reservation system was realtime, unless

* the plane left empty, because all tickets could not be written in
time
* the reservation desk queue becomes so long that many customers
switch queue to a competitor
* the reservation takes so long that the customer hangs up the phone
and calls the reservation desk of the competitor

For instance Win9x can be realtime if the deadline is longer than the
boot time and the system performs the operation without a fault after
a single reboot.

On other applications, the system is not realtime, if it for instance
drops a video frame or drops an audio or video sample or the
audio/video lip synch is lost.

Paul

On Feb 4, 10:53 pm, sandra.bassite...@gmail.com wrote:
> Is there an option besides QNX if I want to run a real-time operating
> system? I want to be able to use managed code, has anyone found more
> detailed informaiton on the .net microframework?
>
> Thanx

You raise two questions, not often asked  together:  Realtime and
Managed code

Real Time- Believe it or  not, Windows CE is real time by most
definitions.  IF you want to see some benchmarks, go to http://
www.applieddata.net/white_papers_list.asp

Managed code is another issue- great for 24x7 systems- which are often
real time.  In general, managed code is a no-no for real time because
the GC can  break in and interrupt the process at any time.
Interestingly,  you can see some benchmarks on the above page where C#
proved to be remarkably real time.  The Case Study for Greer gives you
an example of CE, managed code all in real time.

No all MS managed code is real time- for example the new Micro
Framework is DEFINITELY not real time,  I have some links on my web
page below.  Any questions- please SMS me at
4108044290_AT_teleflip.com; I will get right back.


Lawrence Ricci
Consultant to Industry
http://embeddedinsider.com
410-804-4290

On Mon, 05 Feb 2007 11:23:48 GMT, "FreeRTOS.org"
<noemail@noaddress.com> wrote:

>> i passed out in 2004...
>
>...and you have only just woken up again?  What were you drinking, and is it 
>available in the UK?

Writing a pre-emptive scheduler (=RTOS) is not very hard and anyone
familiar with a particular architecture might write one after a boring
night in the town, but of course no-one would admit it :-). 

However, after looking at some of these implementations, that would
not be a big surprise.

Paul

On 4 Feb 2007 19:53:39 -0800, sandra.bassiterra@gmail.com wrote:

>Is there an option besides QNX if I want to run a real-time operating
>system? I want to be able to use managed code, has anyone found more
>detailed informaiton on the .net microframework?

Not enough info to answer, so some questions:

1) What CPU/uC do you use ?
2) How hard is your real-time (compared with the cycle time of (1)
3) Are you willing to pay for it ?
4) Do you want to port code from QNX to xxx ?
5) Did you do a google search for RTOS, if not, do so.

-- 
42Bastian
Do not email to bastian42@yahoo.com, it's a spam-only account :-)
Use <same-name>@monlynx.de instead !

> i passed out in 2004...

...and you have only just woken up again?  What were you drinking, and is it 
available in the UK?

Regards,
Richard.

+ http://www.FreeRTOS.org
+ http://www.SafeRTOS.com
for Cortex-M3, ARM7, ARM9, HCS12, H8S, MSP430
Microblaze, Coldfire, AVR, x86, 8051, PIC24 & dsPIC
.... and soon AVR32 

On Feb 5, 8:53 am, sandra.bassite...@gmail.com wrote:
> Is there an option besides QNX if I want to run a real-time operating
> system? I want to be able to use managed code, has anyone found more
> detailed informaiton on the .net microframework?
>
> Thanx

hi,
   this is meghna, presently working as an embedded system programmer.
i want to shift my base to RTOS...so was planning to undergo a
training. i passed out in 2004...m having nearly 2.5 yrs of work exp.
is it wise to undergo ar RTOS training at this point my career?
  was planning to go in for QNX RTOS....how diff is it from
VXWorks...is it globally accepted.
   regards,
   meghna
  (09828810526)
 meghna.agrawal8@gmail.com

On Sun, 04 Feb 2007 19:53:39 -0800, sandra.bassiterra wrote:

> Is there an option besides QNX if I want to run a real-time operating
> system? I want to be able to use managed code, has anyone found more
> detailed informaiton on the .net microframework?

Certainly there are other options than QNX.  To name some:  VxWorks,
ThreadX, FreeRTOS, RTEMS, uC/OS, Nucleus, ...

You need to be a bit more specific in your requirements.  My impression of
"managed code" would not be favorable to placing it in a hard real-time
system.


     ~Dave~

Is there an option besides QNX if I want to run a real-time operating
system? I want to be able to use managed code, has anyone found more
detailed informaiton on the .net microframework?

Thanx