Data sheet: http://www.rtdusa.com/pdf/dm7520.pdf
Example source: http://www.rtdusa.com/examples/dm/dm7520.zip
Call them and ask for the register level manual.
- PCI chip: http://www.plxtech.com/products/toolbox/9080.htm
+ PCI chip: http://www.plxtech.com/products/io/pci9080
Notes:
This board is memory mapped. There is some IO stuff, but it isn't needed.