PROBLEM LOADING with MONITOR PROGRAM 18.1 TO DE2-115

Or may be you can try the Computer Systems with Nios II Teaching Material check the link https://www.intel.com/content/www/us/en/developer/topic-technology/fpga-academic/materials-computer-systems.html. This will have DE2-115 board available.

Document link: https://ftp.intel.com/Public/Pub/fpgaup/pub/Intel_Material/18.1/Computer_Systems/DE2-115/DE2-115_Computer_NiosII.pdf

Thanks,
Best regards,
Sheng

p/s: If any answer from the community or Intel Support are helpful, please feel free to give best answer or rate 4/5 survey.