How do I store values in EPCS?

Thanks for pointing to the AN379 sources. I should have checked the literature page instead of searching Altera.com.

I agree, that ALTASMI_PARALLEL apparently replaces the AN379 reference design. It has additional features, particularly buffered page write. When needing to apply changes to the code, I would prefer the AN379 sources for the clearer style.

Both designs can't coexist with a SFL instance built into the design, because the parallel AS controller as well as SFL are instantiating an ASMI_BLOCK, but only one is possible. You have to rewrite part of the code to share a single ASMI_BLOCK instance.