ethernet doubt

You need two Scatter Gatter DMA controllers,

one PLL

and a fast memory (Onchip RAM is used in examples from Altera).

If you have installed NIOS II IDE with examples, you can open the SOPC file with SOPC BUILDER.

This sopc example file is located in c:\altera\90sp2\nios2eds\examples\vhdl\niosii_cycloneii_2c35\tse_sgdma\niosii_cycloneii_2c35_tse_sgdma_sopc.sopc on my computer.

Regards.