Using I/O pins on teh mesa card

The header (hdr) is a 'c' file with defines in it that in this case teensyio could use to help develop a ATC board, it already knows the PP commands, so combine it with teensyio and could write your ATC controller. 'c' is the language used by arduino

so it might give you a start

I would sure appreciate any info you have in this area. I really want to build my own ATC for an 1100MX Tormach but would like to make PathPilot think it's the actual ATC so I don't have to mess with hal, ini, and py files every time they make a new release!

How's your programming skills?
the ZBOT ATC is controlled over what looks to be a USB interface.
you can get all the commands sent to the ATC and expected responses in the python code.

theres code here called I think TINY USBIO that could be easily modified to emulate the ATC Control
based on what you see in the python code.

Pretty good at programming. I started going through the python code last night. Wow, that's some jumbled stuff.

Where is the TINY USBIO you referenced? I searched the forum and didn't find anything. Thanks for the help!

check this thread
forum.linuxcnc.org/pathpilot/35813-usb-io-module