It is an Arm Cortect A8 processor which has co processors, it is not a "dedicated motion chip". It can be used for different tasks not for just motion or not only for motion.
If this is an engineering forum then I suggest be specific about what is what not just talk.
And yes it is an actual pocket beagle board used on the acorn:
https://beagleboard.org/pocket
As far as the Arm Cortex A8 you are showing your lack of knowledge on the subject as usual, it's still a better performer than what UCCNC is using
No even close to Mach3 or Acorn as it has no lathe support or content