Hello,
I'm testing ML501 board, very nice. On the Xilinx site the documentation of this board has some errors like the constraints file(...also unavailable...).
Looking the EDK example design I see errors between UCF file generated for "ml501_bsb_design" and the Schematics(Sheet 3 of 22, for example)
All DDR2 memory pin connected to the FPGA Banks are wrong(they are inverted?)
I rebuild from scratch pin-to-pin from the Official schematics all DDR2 LOC pins to implement one working UCF file but I found this incongruence in the EDK UCF file.
What UCF file I use with this Board?
Reading this simple guide I made a bitstream without problems, and It's working well.
I think is a good idea if Xilinx put a general UCF file for her ML501 board with DDR2,ETH,USB, and other constraints to safe lot of time(with a lamp and zoom into schematics....).
happy day, Callisto.