Changing SOPC File Location

So you are using onchip memory and you are storing the NIOS code in the onchip memory without using any external memory.

Unless something has changed in Quartus in recent versions; if you've specified the SoPC builder folder as a user library and you've compiled your software project, Quartus should automatically pick up the .hex file used to initialize the onchip RAM.

Here is what I would check:

1 - Open up the generated source code file for the onchip memory. See what it calls out as the memory initialization file.

2 - Verify that a ".hex" file exists in the same folder as the generated SoPC builder files with the same name as your onchip memory. This file would have been generated by your software build.

3 - In the Quartus compilation report under the "Analysis and Synthesis" section; look at the RAM summary and verify that your onchip memory is getting the appropriate MIF/HEX file.

Jake