If it is a standard BOSS control that is on it then afraid its not just as simple as connecting a computer with Mach, you will need to modify the wiring and add some hardware. There was a guy called Hillbilly that made a board that you could use for this, I opted for the gut out the old crap and replace with new method.
Laptops are a bad idea if you are planning on using the computer to do the pulsing (using the parallel port) Some work fine but a lot dont and for that reason Artsoft say they are not officially supported unless you are using an external motion control device such as the SmoothStepper, DSPMC etc
Hood