Hi, ive been using Mach3 with my laptop (which have inbuilt paralell port that works ok at address 0x378).
Recently I bought a IO controller card from STLabs (Sunsway) http://www.sunsway.com.hk/products/pci2s1p.html
for use with my rather modern stationary computer which lacks an inbuilt paralell port. I can get the serial ports to work ok (Ive programmed them to work with my
AVR mcu programmer). When I fire-up Mach3 I get no signals from the parport whatsoever (checked for pulses with oscilloscope). Anyone have any clues to why this could be or have been using any separate controller card successfully with mach3.

Have you looked at the new parallel ports address in device manager and entered that into Ports and Pins page in Mach?
 I use PCI cards in both my mill and lathe so they work fine although they are not the brand that you have.

Hood

Yes, altough im starting to get worried that this might not work... In the 'port settings' tab in the device's configuration window (accessible from device-manager), there is a dropdown menu where I can choose between LPT1, LPT2... but LPT1 should lie at address 0x378 which doesnt work  . Soo maybe theyre just adding "printing" (paper) support in their drivers via windows print facilities and not by passing good stuff to 0x378... Anyways, what pci cards do you have which works?.

LPT1 may be showing in device manager because its enabled in the BIOS even though there is no such physical  port. Look for the  other LPT port(LPT2) that is in device manager and put the address of that in Mach and that should work.
Hood

Oh and I have various PCI cards, Netmos chips and SIIG chips are the two I can remember but I have others that work fine.
Hood

Hmm, I believe my card is based on a Netmos chip, Im gonna reboot and check my bios if there is any such setting...

Just put the address of LPT2 in Mach and I am positive it will work.