I'm looking at the possibility of making a PCB with a small controller and Wiznet W5100 IC on it (among other things) and am lost as to where the IO pins are specified in the library. Is it possible to move any of them or are they fixed?
The fixed pins will be the SPI hardware bus if you plan on using the hardware SPI. MISO, MOSI, and SCK. To avoid the need to modify the ethernet library, use D10 as the slave select.
Ah, ok, so I just need to pick the SPI pins for whichever controller I pick, cheers 