I was getting seriously frustrated at trying to get the PICStep gerber file into Eagle for milling purposes, so I did my own rewrite. Similar connections, with a small modification on the motor output terminal block (for unipolar convience)
Also, the current limiting oscilators have a 10turn pot for adjusting.
This is sort of a mash up of Alan's awesome design and the equally excellent EAS design. For firmware, use Alan's code.
BE WARNED: I have not built or tested this design yet. It *should* be okay, but who knows. No warranty implied or expressed.
Included are the Eagle library files for the LMD18245 and PIC16F62x. They need to go into the eagle "lbr" directory.
If you make improvements or corrections, please post them back here on CNCZone.