Arduino to fill a gap

Built a cnc router. Mechanical part is done, motors mounted. Opto-isolator output from paraport is finished. Also have h-bridges rigged for two inputs per stepper, 6 total.
The only missing part is translator (I think it's called). If I had some jk flip flops and some xor's, I could do what's left in hardware but I've built this out of what I have on hand so far so have decided to use the Arduino Uno to finish out.
If I could find a uno library that uses parallel port step/dir signals for input, as well as convert them into the correct 2 bit signals for the h-bridge, I'd be set. Baring that, I guess I've actually got to learn the language Uno uses and write it myself.
On the other hand, if someone has already written this type sketch/library, I'd love to get right to learning how to run LinuxCNC and get past the steep part of THAT curve.
Any assistance much appreciated.

You may find that the LinuxCNC step generator can already output the
correct step pattern that you require:

www.linuxcnc.org/docs/html/hal/rtcomps.html

Guess it'd pay me to start digging deeper into LinuxCNC already, huh? I'm thinking the type stepgen I need is quadrature, at least someone told me that.
From my studies, the step/dir is generated sequentally on 2 pins as such;
00 01 10 11 while the sequence for the steppers is 00 01 11 10. Can it output that sequence?

Hi

As I understand it, quadrature is 2 waves, 90 degree out of phase

Look at step type 2 in the link PCW posted

regards

yes it can

www.linuxcnc.org/docs/html/man/man9/stepgen.9.html

I think HAL will be the one to fill the gap. Dave would be proud.
It's like virtual circuitry. And unless I miss my guess, by not converting the output signals into step/dir, I might actually get fewer instructions between the cut file and my motors, thus less chance for latency. Depends on how it's written i guess.
Thank you all for your help. Guess I can use my Arduino for other stuff now, since it obviously isn't needed here.