integrate SDRAM and Flash in Qsys

You can do one of these:

Bring in an old SOPC Builder design, Qsys should take all the Tristate components and replace them with the new components.

Here is the connectivity you would use to wire up the new tristate scheme:

Generic Tri-state controller (SSRAM)   -->
                                                Tristate pin sharer --> Tristate bridge
Generic Tri-state controller (Flash)  -->

The generic tri-state controllers have a regular Avalon slave interface which you then connect to the masters in your system.

If you are still stuck send me a PM with your email address and I will look for a design I can forward your way containing a flash and ssram.

The new tri-state scheme uses "tri-state conduit" masters and slaves to do the connectivity so in my nasty ASCII art drawing the master connections are on the left and slaves on the write of each connection point.