make better

memory.sv

@@ -0,0 +1,27 @@
+module memory #(parameter RAM_SIZE_BYTES = 4096) (
+    input wire clk_in,
+    input wire do_write,
+    input wire [$clog2(RAM_SIZE_BYTES)-1:0] write_address,
+    input wire [7:0] data_in,
+    input wire [$clog2(RAM_SIZE_BYTES)-1:0] read_address,
+    output logic [7:0] data_out/*,
+    input wire [$clog2(RAM_SIZE_BYTES)-1:0] read_address_gfx,
+    output logic [7:0] data_out_gfxA*/
+);
+    logic [7:0] mem [0:RAM_SIZE_BYTES-1];
+
+    initial begin
+      $readmemh("fontset.bin", mem, 0);
+      $readmemb("rom.bin", mem, 'h200);
+    end
+
+    always_ff @(negedge clk_in) begin
+        if (do_write) begin
+            mem[write_address] <= data_in;
+        end 
+        //$display("MEM    : Reading address %h (%h)", read_address, mem[read_address]);
+        data_out <= mem[read_address];
+        //data_out_gfx <= mem[read_address_gfx];
+    end
+endmodule
+