Jack Coats wrote:
> For a different approach... Open source controller hardware with 
> attached display.
> <snip>
>
> Another option might be to get one of the 'single board' Linux machines, 
> use it to run
> EMC, and do AXIS on a 'display computer'.  This might make it easier to 
> do the 'port' and still
> keep the 'real EMC2' on hardware without display (or sound).  It could 
> use either USB or
> Ethernet attachment.
>
> I could even see running Axis (or equivalent) on one of the little palm 
> top computers, and EMC on
> an 'attached controller box'.
>
> Yes, there is some hand waving and daydreaming in this, but one day we 
> need to start thinking this way.
>   
My main question is "Why?"  Why throw away years of effort that has 
produced a VERY powerful and flexible framework that WORKS?
Is there a real time patch set for that "single board" Linux machine?  
Without that, it is worthless for our purposes.  Why need TWO computers, 
when one works fine?  Think of all the debugging and logging hassles 
when you don't have hard drives on these computers, which would be the 
case on many of the single board embedded systems.

I certainly don't see the need for a move in this direction, yet.  
Maybe, in the future, desktop PCs will be so horribly encrusted with 
bluetooth and other wireless "crap", variable CPU speed, battery and 
thermal management that they will be forever unable to do anything in 
real time.  We may have to develop a hardware compatability list of our 
own, testing specific models for RT performance, parallel port 
compatability, etc.
I can recommend a few models myself, I've been using off-lease Dell 
Optiplex boxes with good results.


Jon

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