How to run CNC machine using USB port

[kheri]

I have my first built CNC machine for carving and have successfully run on parallel port using Mach3 . My 3 axis motor drivers are connected to the parallel port. Can anybody advise me how run my machine using USB port since new computers does not have parallel port ? How do I conect my motor driver to the USB port ? Can Mach3 run on USB port ? Any help is highly appreciated.

[valmet58]

you can buy a PCI parallel port adapter card..they are about $20..
I think you could also look at smoothstepper..if my memory is ok i think
it was designed to work using usb instead of parallel port..