Honored Contributor
Honored ContributorI think you should start with the Tutorials, launch the IDE and choose Help->Welcome->Tutorials.
Adding source files to a project is simple, one way you can do this is just drag the files from Explorer into your project, there are other ways. If you're porting a project from Nios 1.0 then you should read the app note "Upgrading Nios Processor Systems to the Nios II Processor" this is document an350.pdf which can be found in the altera\kits\nios2\documents directory. One thing to note though is that the instruction set changed when moving from Nios 1.0 to 2.0 so you will need to re-write your assembly files.
