I can control 2 nice powerful stepper motors with an 
8 bit parallel port with the processor doing all the work 
for timing.  I hooked up the motors from PC 5 1/4 drives and 
a few other stepper motors I found. I can control the
direction, speed, and make them brake.  I hooked up several
kinds of steppers and checked them out with the drivers and
they worked good.

     Driver in 6502 assembly.

     BASIC program shows graphically which coils are on when turning
           the motors.