In order to insure that the SDRAM works, the answer is complex and may be out of scope for a simple post ... If you really want to know more about this, I can write up more after I finish assembling my MiniMIG1.1
Since nobody answered to this post either people find this knowledge fascinating but completely out of our grasp (like me) or already know about it (I am hoping there are a few in this category, otherwise we will be stuck with 2mb or worse, with a hardware design that overtime becames imposible to implement because those chips can no longer be obtained).
Unfortunately Signal Integrity issues are not a simple problem. At frequencies above 50MHz (actually its the rise times that count) you have to start looking to RF principles. Every track on the PCB starts looking like a transmission line that has to be properly terminated. Maxwell's equations and Impedance matching are the order of the day rather than ohms law and thevenin. This does make SATA and DDR2 a challenge for engineer let alone a hobbyist. Most electronic engineers are still taught nothing of this subject at UNI.
