Precix CNC Router that has the Sensoray 626 pci card and pwm Servos need help

I have a Precix CNC Router that uses the Sensoray 626 pci card with Advanced Motion Controls 12A8E-INV Brush Type PWM Servo Amplifier to drive the motors. The system work with the Precix code that is old. so I'm trying to get Linuxcnc to work on it. I can load the driver for the 626 card and run the 626demo code and I see the limit switches and the encoders. I just don't know where to start to do the interfacing. its all new to me so anything would be helpful.
Thanks
Eric

Is there register level documentation or driver source available for the PCI card?

yes I have all the info and drivers

Link to the manual
www.sensoray.com/downloads/man_626_1.0.5.pdf

This is all new to me on the Linuxcnc so is there a document to know how the program interacts with the hardware?

What do you need the card to do? It looks like digital input/output at 1kHz would be trivial. But other stuff would need more work.