Newbie question about RAMB4_S8

Hello,

I am new in starting to use Altera Quartus and please forgive me if I am using

terms normally used for Xilinks :).

After I have downloaded the web-version of Quartus I downloaded the AVR-core from openrcores.

I want to compile this core and place it into a EP3C25 to start playing arround and start learning FPGA's.

When I compile the AVR-core I got the below error:

Error (10482): VHDL error at XPM16Kx16.vhd(59): object "RAMB4_S8" is used but not declared

Is there somebody who is willing te help me and point me into the right direction how I can solve this and change the vhdl-files so that I can use the on a Cyclone III.

Thank you and best regards,

Wamor