Kent A. Reed wrote:
> For those of you following the RTAI on ARM discussion, I just stumbled 
> across a primitive porting guide that Torsten Koschorrek posted to the 
> RTAI repository in March of this year.
> Who knows, he might actually do the cleanup and patch work. He might 
> even scratch Jon's itch ;-)
>   
Well, since the Atom boards have turned out to perform so well and are 
current
products, the looming fear of no parallel ports and/or horrible RT latency
has receded a bit.  You still have to carefully pick the hardware for 
LinuxCNC
to run well, but at least it IS available and at a reasonable price.  
Still, the parallel
port is a horror, and whatever flavor of PCI you choose involves some 
difficulty
in interfacing chips.  The Beagle has pretty easy to use GPIO pins, and 
maybe
the newer boards will have better performance that the original.

But, the glacial pace of getting an RTAI patch for these chips is pretty 
worrisome.
The Beagle Board is a very popular platform for developers, but at this rate
the LTS kernels will be obsolete before the RTAI patch is even available.
That is not an acceptable path, either.

Jon

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