If your Breakout board needs a parallel connection and you don't have a printer port on the back of your computer (magenta 25pin female D) then you can get a PCI card which will give you two. I run Mach3 using one of the outputs and it is OK. http://www.eclipsecomputers.com/prod...ode=IO-PPRINT2

Check that you have a spare PCI slot though !!

Cheers, Rob