Using SDRAM in TRDB-D5M demonstration

Hello,

I have got a question about operating of the demonstration program for the TRDB-D5M.

I'm using DE-115, which has two SDRAM modules. During working, the camera writes data to both of these modules simultaneously. So I can not understand how this data is displayed on the monitor properly.

Whould explain the video data path from CMOS to VGA?

P.S. Are there any megafunctions in Quartus to communicate with such SDRAMs, cause I've found only for DDRs?

Thanks.