Am I reading this assembler correctly?

[crhomberg]

You have for a long time been an inspiration to me on how you can interctively work with assembler and PBP. Your Instant interrupts are a great result of that.

Thanks for checking out the code I posted, I changed the I0B's of my code but the motor continued with a jerky movement when running slowly. The project is a X-Y yoke for a CCTV camera using 2 bi-polar stepper motors. The person who designed the original camera has long since dissapeard and I need to add some new features. My problem is that assembler is worse than trying to read Chinese for me.
His version rotates slowly as smooth a silk but when I program that same PIC with my version in PBP it looks like a tractor idling. I read the datasheet of the PBL3717 and I think I have written it correctly. (I cannot change to another chip as the PCB and components have been purchased)
He definately wrote all movements to run in quarter step mode.I have attached his full code (The slave code is the second pic which just checks a parrallel bus to see what movements it must make) and my modified code that I tried on friday.

Best Regards

Christopher Rhomberg