Jetson Nano as LinuxCNC driver

"Fiddeling" about parport trasscripting is only the half way
and you are better off with a real fpga pci parort card

For 10$ there is nothing that can do realtime IO! Nothing.
So i do like parallel ports, a lot, especially since the time USB got introduced and it was more trouble than it was actually worth. Had to work a lot with printers and scanners, at that time i would avoid USB like the plague ! Parallel port worked always.
And when i had to copy 40 or 50 MB of stuff on Floppy disks, that was miserable till i found some DOS software that used parallel port for data transfer from PC to PC, it was fast a reliable and never failed ! <<< This was way before USB existed.

Full disclosure I worked for Nvidia for 7+ years, left there in 2016.

My experience with the Nvidia parts has been pretty good with interrupt handling, so it looks like a good candidate. The GPIOs should be good for mutli-megahertz operation. I have pre-ordered one of the dev kits. I'm seeing an unstuffed battery clip on the back of the processor board, so I'm interested to see if there is an RTC supported on the board - may be in the SoC...

Should the onboard GPIO not be effective, there is an M.2 E-key slot which can be pulled out to a full-size x4 PCI-e slot with an adapter .

Unlike the RPi (even the 3 B+), the GPU on this should be able to wipe the floor with other SBCs for OpenGL support - but we'll see if the memory limitation of 4GB is going to kill us.

I have a Bridgeport Series 1 J-head I've been meaning to convert to CNC, with a tilt/rotate stage (5-axis). That'll be the target platform. NEMA42 4800oz-in @ 72V with Trinamic 10K-ppr encoders - just need Gecko to come out with a stepper+encoder drive...

Just ordered an x86 Atomic Pi....see how that goes, if it doesn't work out it seems to run Kodi ok

It does have ethernet on board connected to the PCIe bus and the SPI bus is expose as well.

Anyone have fun with 10BASE2 network and a boss that liked to make dodgy cables ?

Mine just arrived. I'm trying to learn how to run Tensorflow models on it, but I'm not averse to getting another one and would be happy to alpha/beta test as needed.

Probably want to check if preempt_rt works with it out of the box - it might need some massaging, but Nvidia should be amenable as it is advertised as a robotics platform...

Also need to see in there's an RTC with hardware timing interrupts, and look at the memory mapping for the GPIO (need direct access to the registers in C for best speed).