I have AHDL code implemented in Cyclone II FPGA. Can i use the same code in higher version of Cyclones or other new generation Altera FPGAs? Need any change in Quartus version for the same?

Hi Roopak, Good day. Yes, AHDL is Altera HDL. You can use AHDL codes in any devices as long as you're using Quartus design software. You can check below link for device support list for Quartus. http://fpgasoftware.intel.com/devices/ Thank you.