Ah... I see. That's probably because ASMI is older than the EPCS Controller. If you have not already figured this out, the EPCS controller does everything that the ASMI device did plus it has a bootloader built into it. When looking for documentation I would look at the following links since they contain the latest and greatest information:
http://www.altera.com/literature/lit-nio2.jsp (
http://www.altera.com/literature/lit-nio2.jsp) (Nios II)
http://www.altera.com/literature/lit-sop.jsp (
http://www.altera.com/literature/lit-sop.jsp) (SOPC Builder)
http://www.altera.com/literature/lit-qts.jsp (
http://www.altera.com/literature/lit-qts.jsp) (Quartus II)