DDR2 on two sides - one controller

The idea is to connect the output signals (command, address) of the HP controller to the two physical pins each. E.g. the output ddr2_a[0] of the controller has to go to both the RamA_A[0] and RamB_A[0] pins. So you need to create an intermediate signal (or wire) to connect this. You will have to delve into the .sdc file and modify / copy the appropriate constraints to cover both sets. I would then expect the Quartus II fitter to apply fast register IO settings etc. to both pin sets.