Try to select a EPP or ECP port on your windows config.
Is this setting within device manager or BIOS? Because in the BIOS there are absolutely no com or printer ports listed, just USB as far as peripheral ports on this Dell pc.
Mach works with a printer port address 0x378.
Mach3 works with any address, as long as it's the correct one.
Have you tried entering 9C00 and 9400?
I have tried that as well as adding the 0x as well, but no luck.
This has been very frustrating since the machine completely worked prior to the old PC dieing. I am glad I had prepared for the old PC's death by having my mach files and settings backed up, but pulled a completely bonehead move by not checking to see if this PC had a printer port. I found the post on here where people suggested the addon card I purchased, but I don't know why the resource numbers I enter in are not working.