Transfer RAM content to computer

Assuming you don't care if it takes a long time to transfer the data you can try HostFS (Host file system). Using HostFS you can open, write, read, and modify files located on your host system from the FPGA (containing Nios II). It works over the debug channel to move data back and forth to the host. You can find more info here: http://www.alterawiki.com/wiki/host_file_system I haven't used it in a long time but I seem to recall getting around 4.3 KB/s speed with in. So if you want to try it out I recommend experimenting with small files first. Another method would be to use System Console to pull the contents out of the FPGA and funnel the data into a file on the host. If you search around you'll find various ways to do this.