EMC2 is a machine control program that conforms to "standard" g-code formats.
There is a useful setup application to aid in the use of stepper drives . Step and Direction.
EMC2 will send pulses from a PC parallel port to motor drives configured to receive them.
EMC2 has no provision to act as a motor drive.
The options available with specialty add on cards are extensive.
Search the web, the EMC2 web site and forum has more information available than any one person can read in a week!