Lots of changes, trying to get ROM working

I think I did some funny math errors so new goal is 8-bit pcm

verification/audio/pwm_tb.sv

@@ -0,0 +1,57 @@
+/*****
+ * pwm_tb.sv - testbench for the pwm.sv module. 
+ *
+ * @author: Dilanthi Prentice, Waylon Cude
+ * @date: 6/12/2025
+ * */
+
+module pwm_tb;
+    bit clk, reset;
+
+    logic load;
+    wire pwm_pin;
+    logic [15:0] sample;
+
+    pwm dut (.*);
+
+    initial forever #10 clk = ~clk;
+
+    initial begin
+        reset = 1;
+        @(posedge clk);
+        @(posedge clk);
+        reset = 0;
+        load = 1;
+        sample = 0;
+        for (int i=0; i < (1<<16)-1; i++) begin
+            @(posedge clk) assert (pwm_pin === 0)
+                else $error("Should be low at %d",i);
+        end
+        reset = 0;
+        load = 1;
+        sample = '1;
+        @(posedge clk)
+        for (int i=0; i < (1<<16)-1; i++) begin
+            @(posedge clk) assert (pwm_pin === 'z)
+                else $error("Should be high at %d",i);
+        end
+
+        reset = 0;
+        load = 1;
+        // Should be about half on
+        sample = 1<<15;
+        @(posedge clk)
+        for (int i=0; i < (1<<15); i++) begin
+            @(posedge clk) assert (pwm_pin === 'z) 
+                else $error("Should be high at %d",i);
+        end
+        sample = 1<<15;
+        for (int i = (1  << 15); i < (1<<16)-1; i++) begin
+            @(posedge clk) assert (pwm_pin === 0)
+                else $error("Should be low at %d",i);
+        end
+        $finish;
+
+    end
+
+endmodule

verification/audio/pwn_tb.sv

@@ -1,6 +0,0 @@
-/*****
- * pwn_tb.sv - testbench for the pwn.sv module. 
- *
- * @author: Dilanthi Prentice, Waylon Cude
- * @date: 6/12/2025
- * */