Need Help!- Stepper motor step/Direction conversion.

[shujah]

Does anyone know how I can convert a step/direction signal to phase drive?
Mach3 uses step/direction and I want to control a Bridgeport boss series one machine with stepper motors which uses phase drive. Quadrature I think its called, it looks like this:
L L
H L
H H
L H

Can any body have experience to make a device (i think flip flop setup) then please help me.


I think I know what I am trying to do now, I just don't know how to do it. The pc output signal would look like this:
Direction: 1 (cw) or 0(ccw)
Step: pulses on and off for each step

Every time the step signal pulses I need to somehow shift my output from 0 to 1 or from 1 to zero, ultimately looking like above
00 Step 1
10 Step 2
11 Step 3
01 Step 4

a low direction signal will reverse steps from 4 to 1
Question is what electrical gadget will take a momentary input and convert its output from high to low (or low to high) for each input pulse.

Ahmad Shujah.
bigw@wol.net.pk