No, it's running vxWorks on a RAD6000.
<
http://www.washingtontechnology.com/news/18_9/telecom-it-infrastructure/213…
  
Expensive little puppies, too.
        --jc
On Monday 05 January 2004 16:56 pm, Mike Shaw wrote:
> Has anyone seen any specs on what the current programs are using?  Someone
> said that the current mars rover was running Darwin on a PowerPC...which
> I kind of doubt.  Sounds like an urban legend that evolved from that
> picture of the powerbooks in mission control.
  
> -Mike
  
> On Mon, 05 Jan 2004 13:41:24 -0800 Kirk
Davis <kdavis(a)ndx.net> wrote:
> >Mars rover made me curious about the computers used in older
> >missions. Found this cool link giving a detailed history:
> 
  
>
>http://www.hq.nasa.gov/office/pao/History/computers/contents.html
> 
  
> >Kirk