If ever there is need for MISRA C then this is it!

Just to make me feel even more insecure about flying.
http://www.cashloopholes.co.uk/modules.php?name=Forums&file=viewtopic&t=28

Rob Horton <yahoo@mr_horton.com> wrote:

>Just to make me feel even more insecure about flying.
>http://www.cashloopholes.co.uk/modules.php?name=Forums&file=viewtopic&t=28

Ignoring for a moment what the article says about the sad state of
software development in general, this has no safety implications
whatsoever.

The entertainment systems are totally isolated from the main flight
control and navigation systems, they are not required to comply with
the same standards, they are not subject to the same level of
scrutiny, are not provided by the same vendors, etc.
They can fail in any way (other than exploding or catching fire,)
without affecting the airplane's safety.

Now if you really want to worry, do some research on the various
Airbus fly-by-wire software problems...


Roberto Waltman

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"Rob Horton" <yahoo@mr_horton.com> wrote in message 
news:qt-dnRPPB9OrUrXbRVnyvQA@pipex.net...
> Just to make me feel even more insecure about flying.
> http://www.cashloopholes.co.uk/modules.php?name=Forums&file=viewtopic&t=28

You know, if it was me (the mischievious type), I woulda done it repeatedly 
just to hear the grumbles again and again (many grumbles and one giggle).

On Apr 20, 10:33 am, Rob Horton <yahoo@mr_horton.com> wrote:
> Just to make me feel even more insecure about flying.http://www.cashloopholes.co.uk/modules.php?name=Forums&file=viewtopic...

How does MISRA-C stop guillible from believing tall tales?

On Apr 20, 3:33 pm, Rob Horton <yahoo@mr_horton.com> wrote:
> Just to make me feel even more insecure about flying.http://www.cashloopholes.co.uk/modules.php?name=Forums&file=viewtopic...

Any reason to think it was written in C?  Any suggestion as to which
MISRA-C rule might help with this?

On Apr 20, 10:33 am, Rob Horton <yahoo@mr_horton.com> wrote:
> Just to make me feel even more insecure about flying.http://www.cashloopholes.co.uk/modules.php?name=Forums&file=viewtopic...

I call bullshit; complete, utter, unmitigated, no-excuses, no-holds-
barred partially-digested plant matter liquid ordure gushing from the
rectum of a male bovine directly into HTML format.

I ask all the engineers here - what is easier to design? A multihead
system that drives 400 or 500 screens directly from a single CPU box
running multiple threads on a [plurality of] CPUs, or 500 single-head
systems that run a single game OS, like a Nintendo Gameboy, and
communicate the voice stuff for the phone over a local network?

If you were designing the latter, why would you need to propagate a
LOCAL game configuration parameter to all the units in the network?
Why would this crash any of them?

I'm utterly certain this story is a completely bogus fabrication which
someone is trying desperately to promote into an urban legend.

"larwe" <zwsdotcom@gmail.com> wrote in message 
news:1177172189.846085.301370@y80g2000hsf.googlegroups.com...
> On Apr 20, 10:33 am, Rob Horton <yahoo@mr_horton.com> wrote:
>> Just to make me feel even more insecure about 
>> flying.http://www.cashloopholes.co.uk/modules.php?name=Forums&file=viewtopic...
>
> I call bullshit; complete, utter, unmitigated, no-excuses, no-holds-
> barred partially-digested plant matter liquid ordure gushing from the
> rectum of a male bovine directly into HTML format.

Don't hold back, chum, tell it like it is.

> I ask all the engineers here - what is easier to design? A multihead
> system that drives 400 or 500 screens directly from a single CPU box
> running multiple threads on a [plurality of] CPUs, or 500 single-head
> systems that run a single game OS, like a Nintendo Gameboy, and
> communicate the voice stuff for the phone over a local network?

As an engineer, I take your point and agree with you.

As an engineering manager, though, I'm not sure. I've dealt with too many 
systems where the basic architecture was fecked. Perhaps somebody somewhere 
decided it had to be a single machine (weight constraints, perhaps?) and it 
went downhill from there...

Nowadays, when I meet clients, I get them to concentrate on requirements 
only (including cost/weight etc). I forbid them to think in terms of 
implementation until after they've seen my proposal (which usually manages 
to explain why the solution they were originally thinking of was a Really 
Bad Idea).

Steve
http://www.fivetrees.com

In article <kmkh23dfnrdpmu2sdht6d5n2q5s8sov9rt@4ax.com>, Roberto Waltman 
<usenet@rwaltman.net> writes
>Rob Horton <yahoo@mr_horton.com> wrote:
>
>>Just to make me feel even more insecure about flying.
>>http://www.cashloopholes.co.uk/modules.php?name=Forums&file=viewtopic&t=28
>
>Ignoring for a moment what the article says about the sad state of
>software development in general, this has no safety implications
>whatsoever.
>
>The entertainment systems are totally isolated from the main flight
>control and navigation systems, t

No... They *should be* in exactly the same way the software *should* be 
reliable....

I bet they said the same about the USS Yorktown

-- 
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
\/\/\/\/\ Chris Hills  Staffs  England     /\/\/\/\/
/\/\/ chris@phaedsys.org      www.phaedsys.org \/\/\
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/

In article <1177096814.903442.272190@o5g2000hsb.googlegroups.com>, Dingo 
<dingoatemydonut@aol.com> writes
>On Apr 20, 10:33 am, Rob Horton <yahoo@mr_horton.com> wrote:
>> Just to make me feel even more insecure about 
>>flying.http://www.cashloopholes.co.uk/modules.php?name=Forums&file=view
>>topic...
>
>How does MISRA-C stop guillible from believing tall tales?
>
IT doesn't. Hopefully it just helps make software that little bit more 
reliable
-- 
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
\/\/\/\/\ Chris Hills  Staffs  England     /\/\/\/\/
/\/\/ chris@phaedsys.org      www.phaedsys.org \/\/\
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/

In article <1177136496.470511.272550@b75g2000hsg.googlegroups.com>, 
stephen <stephenbennyhat@gmail.com> writes
>On Apr 20, 3:33 pm, Rob Horton <yahoo@mr_horton.com> wrote:
>> Just to make me feel even more insecure about 
>>flying.http://www.cashloopholes.co.uk/modules.php?name=Forums&file=view
>>topic...
>
>Any reason to think it was written in C?

If it was PC based infotainment it was probably C++ on an MS platform or 
Linux

> Any suggestion as to which
>MISRA-C rule might help with this?

It depends on what the actual course code problem was.

-- 
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
\/\/\/\/\ Chris Hills  Staffs  England     /\/\/\/\/
/\/\/ chris@phaedsys.org      www.phaedsys.org \/\/\
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/