Unable to Infer M9K in Quartus - Unable to Infer M9K in Quartus Hi all, I borrowed some code from a Xilinx project, where RAM was inferred successfully. I would like to do the same in my Quartus 18.1 project with my MAX10 FPGA DevKit. Here's both methods of inferring I have attempted: reg [(DWIDTH-1):0] mem [(1<<AWIDTH)-1:0] /* synthesis ramstyle = M9K */; (* ramstyle = "M9K" *) reg [(DWIDTH-1):0] mem [(1<<AWIDTH)-1:0]; Neither of which throw any errors or warnings (searched Quartus console). I have also checked the resource utilization report, and see Logic Cells (~10,000) / Dedicated Logic Registers (~8000) being used rather than M9Ks (0). Thanks in advance! Replies: Re: Unable to Infer M9K in Quartus Hi, I’m glad that your question has been addressed, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you. Best Regards, Shyan Yew Replies: Re: Unable to Infer M9K in Quartus Yep, this seemed to be it. I switched to the Quartus template and it worked. Replies: Re: Unable to Infer M9K in Quartus Your code for the memory block itself is way too complicated for Quartus to infer it from block rams. You need to look at the verilog templates that Quartus supplies for inferred memory. Here is what I use and it infers as block ram (M9K, M4K depending) just fine. Note addr , mdi , mwr are wire type; mdo are reg type. reg [0:11] memory [0:MEMSIZE-1] /* synthesis ramstyle = "no_rw_check" */; always @(posedge clk) begin if (mwr) memory[addr] <= #TPD mdi; mdo <= #TPD memory[addr]; end Replies: Re: Unable to Infer M9K in Quartus always@(posedge clk) begin if(rst) begin // set things to 0 end else begin if((|wea_r) && wr_ena_r) begin for (i = 0; i < (DWIDTH/8); i=i+1) begin if (wea_r[i]) begin for (j = 0; j < 8; j = j + 1) begin mem[wr_addr_r][(8*i)+j] <= data_in_r[(8*i)+j] && wea_r[i]; end end end end if (rd_ena) data_out_r <= mem[rd_addr_r]; else data_out_r <= 0; end end Replies: Re: Unable to Infer M9K in Quartus Where is the code for how the RAM is to operate? If you don't code the RAM properly, it's not going to get inferred into a RAM block.