PMDX boards are used by the folks at IH CNC Mills & Machinery - Made in the USA
From what I saw, and after Tommy fixed my MACH3 up in nothing flat, my opinion is that they do not use second rate items in their mills.
Concerning Parallel Ports:
With computers take the conservative route; so if at all possible, do not use the parallel port on your motherboard, instead buy and install two PCI parallel port boards. Look on eBay or a http://www.newegg.com/. It appears from all I have read that it is better to burn up a $20 PCI card that a motherboard. I fix computers for friends, and it continues to astonish me what can go wrong. I had the personal settings on my Dell Workstation get corrupted this week [relative easy fix..but time consuming], though I am pretty sure what went wrong [operator error most likely!!!], it is the first time anything has happened to this computer in 7-years.