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Subject: Re: Another possible candidate for expansion of Rockbox?

Re: Another possible candidate for expansion of Rockbox?

From: Fred Maxwell <>
Date: Mon, 08 Mar 2004 09:57:49 -0500

The NASA example was hypothetical. I worked on the development and
testing of a satellite that used vxWorks and I did not want to create an
example which cast aspersions on vxWorks or any other current product.

Yes, VRTX and pSOS are basically dead now. VRTX was last sold by Mentor
Graphics in 2003 (not very actively) though it is still supported. pSOS
has been phased out (by the company that's pushing vxWorks), but look at
its run: 1982-1999. Not bad.

The point being that compact, purpose-built, real-time operating systems
are appropriate for devices like the iPod while Linux is not.

   Fred Maxwell

VanBaren, Gerald (AGRE) wrote:
> Hi Fred,
> Correction: NASA uses WindRiver's vxWorks. VRTX was a Hunter & Ready
> product that no longer exists (I forgot who bought them out and let it
> die away). Incidentally, pSOS effectively no longer exists either:
> WindRiver bought it and has phased it out.
> gvb
>>-----Original Message-----
>>[]On Behalf Of Fred Maxwell
>>Sent: Friday, March 05, 2004 4:56 PM
>>To: Rockbox development
>>Subject: Re: Another possible candidate for expansion of Rockbox?
>>eD\/ARd0 F/\KEn^M3 wrote:
>>>I believe it's ALWAYS better to have an open OS.
>>After 20+ years in the embedded systems arena, I'll have to disagree.
>>The finest real-time OSs available are proprietary, closed source
>>products. They weren't developed by taking a desktop or
>>server OS and
>>stripping stuff out. They were not designed to maintain
>>with old Unix apps. They were purpose-built to be small, fast, and
>>bulletproof. If you want to know the worst-case interrupt latency in
>>clock cycles, it's probably already been published. Try finding that
>>for ucLinux.
>>When building something, you want responsible vendors who
>>have something
>>to lose. If a failure of VRTX causes NASA to lose a satellite, it's
>>going to hurt the people who make VRTX -- in a major, ugly
>>way. If some
>>piece of Linux code written by a 19 year old in the Ukraine
>>fails, what
>>does he have to lose?
>>All things being equal, and open OS is the better choice, but
>>things are
>>seldom equal.
>> Fred Maxwell
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Received on 2004-03-08

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