Hell
I have a Routout CNC router which I've been using with Linuxcnc for a number of years. I have an old PC with a parallel port and I'm happy with linuxcnc and familiar with it.

I've now bought a mill which has been set up to use Mach 3 (through a USB cable). I don't have Mach 3. How easy would it be to use linuxcnc on this? To state the obvious, this is not exactly the often-asked question about whether you can use linuxcnc on a computer with only a USB port ( know you can't). I already have the parallel port, I need a way of translating the parallel port's output into a USB format, if this is possible.

Thanks