Honored Contributor
Honored ContributorI've re-thought what I typed above. I stand by most of it, but now that I think about it, MiR, I think there is something funny going on WRT the EPCS controller. I think slacker got it right in the separate thread in the software forum on this issue.
Setting the Nios II reset vector to EPCS should not cause code to be linked to that address (0x0 in your case), because the EPCS loader peripheral has a dedicated firmware rom with the boot loader; it is never linked into the .elf. Further, the EPCS chips themsevles are not ordinary memory-mapped devices such as CFI flash. By contrast, if you were linking some of your software/data into CFI flash I could see the download verification error occuring... ....sorry to be wishy washy about this, its just that something doesn't seem right and nothing should be linked to EPCS like that...
