How Can I set up DMA operation with my own PC software application?

Leon,

The chaining DMA hardware does write to the EPLAST field at 0x800c as you suspected. Nothing else needs to be in the 0x800 to 0x80b range. (The testbench BFM Driver may store a copy of the descriptor header there for it's own bookeeping purposes, I can't remember off the top of head for sure, but that is not needed for the actual hardware operation.)

See my post# 5 (http://www.alteraforum.com/forum/showpost.php?p=10857&postcount=5) above where I said the same basic thing.