The Schematic and Layout files are here. Note that there are some errors with the design and symbols that are described in the mistakes.txt file.

The tools I used don't have any of the error checking that most other tools have, but they're free and the boards produced are cheap. There are a couple of hitches: there is no way to split power planes, and the minimum outline radius is greater than the slot size of the PCI connector. I marked the slot positions with traces, and used a dremel cut-off wheel to cut the slots.

When I created the PCB, I wasn't sure which PCI signals were necessary, and I included too many. The DAC also uses too many lines. I designed the board with a 16-bit part in mind, but that was not available so I used the 12-bit version instead. With the noise from a common digital and analog ground plane, it is unlikely that the difference in resolution matters. The SRAM chip on one of my boards had bad address lines on data bits 5 and 6, so I swapped the lines with bits 0 and 1 in the .UCF pinout file. For real fun and games, replace the SRAM with DRAM.

Schematic pages:

FPGA
FPGA support
DAC and USB
PCI and SRAM
Power

 

Here's the Finished board:

The output is one of the BNC connectors on the left side of the card, and the USB connector is below it. The card edge connector fits in a USB expansion connector as a 5/3.3V universal device. External power can be connected to the jack on the top right of the board.

The total cost was around $500 for two cards. The PCB cost $200 for a pair (minimum order) and the components around $300. It should be possible to reduce the cost by up to $100 with simple changes to component selection.