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From: Marius Amado Alves <amado.alves@netcabo.pt>
Newsgroups: comp.lang.ada
Subject: Re: Would You Fly an Airplane with a Linux-Based Control System?
Date: Fri, 26 Nov 2004 11:40:56 +0000
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Date: 2004-11-26T11:40:56+00:00

Alexander E. Kopilovich wrote:
>... 
> - The on-board software detects that one of the accelerometers is out of
> range (actually, there was FPU exception generated when float-to-integer 
> conversion exceeded the capacity of the integer), this was interpreted as
> hardware error and caused the backup processor to take over;...
> 
> Do you agree that this addition is enough there?

No. This whole talk of hardware-generated exception sounds like "FUD". 
Namely, it sounds like your trying to blame the hardware. The cause was 
a SOFTWARE enginering error. Yes, a BUG. In the Ada software. And 
because it's connected to exceptions, the hypothesis that if the thing 
had been done in an exceptionless language like C the effect might have 
been different. And yes, maybe less bad. And none of the explanations 
I've seen so far (here, in books, and in the Internet) disprove this 
hypothesis.