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Don't let anybody hear you moved to xilinx.
use core generator in ISE to get equivalent memory or use infererence.
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Thanks for your response,
so, when i use core generator i have to know what kind of memory the program used, by referring to the attached file "memoria.vhd" which use the altera.mf library, I have to create the "altsyncram" component compatible with xilinx, but I can't understand well the memory because I have no idea about the difference between altera memories and xilinx memories,
So if you have any other advice to give me, i take :)
Thank you again,