Anders Wallin wrote:
>> 2) How portable is the real-time code (ie: can it be compiled for Arm
>> or PowerPC)?
>>     
>
> LinuxCNC uses the RTAI kernel/API. There are a number of architectures
> listed here https://www.rtai.org/
> I don't know if anyone has made LinuxCNC work on other than x86 and x86_64
>
>   
I sent Torsten Koschorrek of RTAI a Beagle Board about 18 months ago, and as
you can see, there is no ARM Cortex-A8 RTAI available yet.  I can't 
believe it has taken
this long!  There is an RT-Preempt kernel that was done by some French 
guys, but I don't
know if it has suitable latency for LinuxCNC, but it almost certainly is 
good enough
for a system with attached hardware (not software stepping).
>> 3a) Is there any existing support for multiple independent processors
>> (ie: multiple processor, but running multiple kernels vs. a single
>> linux kernel running on multiple cores/chips)
If different kernels, then it may be a non-shared memory system, you have to
be concerned with communication between the processors in that case.

Jon

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