Wired forgotten 'enable' in noise. Removed unused old code.

src/noise.v

@@ -33,6 +33,7 @@ module noise #( parameter LFSR_BITS = 15, LFSR_TAP0 = 0, LFSR_TAP1 = 1, paramete
     wire noise_trigger;
     tone #(.COUNTER_BITS(COUNTER_BITS)) tone (
         .clk(clk),
+        .enable(enable),
         .reset(reset),
         .compare(noise_freq),
         .out(noise_trigger));
@@ -59,66 +60,3 @@ module noise #( parameter LFSR_BITS = 15, LFSR_TAP0 = 0, LFSR_TAP1 = 1, paramete
 
     assign out = lfsr[0];
 endmodule
-
-module noise_ #( parameter LFSR_BITS = 15, LFSR_TAP0 = 0, LFSR_TAP1 = 1, parameter COUNTER_BITS = 10) (
-    input  wire clk,
-    input  wire reset,
-    input  wire reset_lfsr,
-
-    input  wire [COUNTER_BITS-1:0]  compare,
-    input  wire is_white_noise,
-
-    output wire  out
-);
-
-    reg [COUNTER_BITS-1:0] counter;
-    reg [LFSR_BITS-1:0] lfsr;
-
-    // For the SMS (1 and 2), Genesis and Game Gear, the tapped bits are bits 0 and 3 ($0009), fed back into bit 15.
-    // For the SG-1000, OMV, SC-3000H, BBC Micro and Colecovision, the tapped bits are bits 0 and 1 ($0003), fed back into bit 14.
-    // For the Tandy 1000, the tapped bits are bits 0 and 4 ($0011), fed back into bit 14.
-    always @(posedge clk) begin
-        if (reset) begin
-            counter <= 0;
-            lfsr <= 1'b1 << (LFSR_BITS-1);
-        end else if (reset_lfsr) begin
-            lfsr <= 1'b1 << (LFSR_BITS-1);
-        end else begin
-            if (counter == 0) begin
-                counter <= compare - 1'b1;  // reset counter
-                if (is_white_noise) begin
-                    lfsr <= {lfsr[LFSR_TAP0] ^ lfsr[LFSR_TAP1], lfsr[LFSR_BITS-1:1]};
-                end else begin
-                    lfsr <= {lfsr[LFSR_TAP0]                  , lfsr[LFSR_BITS-1:1]};
-                end
-            end else
-                counter <= counter - 1'b1;
-        end
-    end
-
-    assign out = lfsr[0];
-endmodule
-
-module noise_control_decoder #( parameter COUNTER_BITS = 10 ) (
-    input  wire [2:0] control,
-    input  wire [COUNTER_BITS-1:0] tone_freq,
-
-    output reg [COUNTER_BITS-1:0] noise_freq,
-    output reg noise_type
-);
-    // Noise 3 bit control register format: {FB, NF0, NF1}
-    // NF0, NF1: Noise Generator Frequency Control
-    // FB: Noise Feedback Control
-    always @(*) begin
-        // NF0, NF1 bits
-        case(control[1:0])
-            2'b00:  noise_freq = 32;    // =  512/16
-            2'b01:  noise_freq = 64;    // = 1024/16
-            2'b10:  noise_freq = 128;   // = 2048/16
-            2'b11:                      // = tone_freq*2
-                    noise_freq = {tone_freq[COUNTER_BITS-2:0], 1'b0};
-        endcase
-        // FB bit
-        noise_type = control[2];
-    end
-endmodule