The VYBRID_SAMPLE_CODE from the website includes an DRAM init Script for the DS-5 Debugger. However it seems it doesn't correctly initialize the Vybrid Tower Samsung Memory. I modified some register settings and got this script works now for my Vybrid Tower Kit. Care must be taken when you again initialize clocks etc in your C Project because most of PLLs etc are already setup  in the script. Regards, Hans-Peter