[ger21]

The G100 replaces the parallel port and breakout board (s). It doesn't take the place of the drives. The G100 creates the step and direction signals, much cleaner and faster than the parallel port. Where the parallel port is limited to 45000 steps per second with Mach3, the G100 can output 4,000,000 steps per second.

If you wanted to, you can connect the hobbyCNC drives or Xylotex drives to a G100. Any drives that accept step and direction should work, either stepper or servo.