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ref-sdr-sdram-vhdl controller reference design missing components

Honored Contributor I

Hi all, I am new to VHDL design and I'm trying to the SDRAM controller code found here http://www.altera.com/products/ip/altera/ocore_sdr_sdram.html.  


It appears to be incomplete though. When I try to simulate I get two unbound warnings to missing components "altclklock" and "mt481c8m16a2". Consequently the code does not produce any results. 


Does anyone know if these components are available anywhere? 


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