simonmonk
diff --git a/‎papilio/ch03_counter/src/counter_papilio.ucf
+1-1 b/‎papilio/ch03_counter/src/counter_papilio.ucf
+1-1
diff --git a/‎papilio/ch08_tone/src/debouncer.v
-45 b/‎papilio/ch08_tone/src/debouncer.v
-45
diff --git a/‎papilio/ch08_tone/src/papillio.ucf
+1-1 b/‎papilio/ch08_tone/src/papillio.ucf
+1-1
diff --git a/‎papilio/ch08_tone/src/tone.v
+2-2 b/‎papilio/ch08_tone/src/tone.v
+2-2
diff --git a/‎papilio/ch08_tone/src/tone_tester.v
-1 b/‎papilio/ch08_tone/src/tone_tester.v
-1
diff --git a/‎papilio/ch08_tone/tone.xise
+1 b/‎papilio/ch08_tone/tone.xise
+1
diff --git a/‎papilio/ch08_tone/tone_tester.bit
0 Bytes b/‎papilio/ch08_tone/tone_tester.bit
0 Bytes
@@ -3,7 +3,7 @@
 # Joystick select Push Switch is Clock
 # LEDs 0 to 3 are outputs
 
-NET "Clock" LOC = "P22" | PULLUP | CLOCK_DEDICATED_ROUTE = TRUE;
+NET "Clock" LOC = "P22" | PULLUP | CLOCK_DEDICATED_ROUTE = FALSE;
 
 NET "QA"  LOC = "P5"; 
 NET "QB"  LOC = "P9"; 
 
@@ -3,7 +3,7 @@
 NET "CLK" LOC = P89; #32MHz 
 
 # Output
-NET "tone_1khz" LOC = P85;
+NET "tone_1khz" LOC = P85; 
 NET "tone_100hz" LOC = P83;
 NET "tone_12khz" LOC = P78;
 
@@ -15,8 +15,8 @@ begin
   if (prescaler == CLK_F / 2 - 1) 
   begin
     prescaler <= 0;
-	 counter <= counter + 1;
-	 if (counter == period)
+    counter <= counter + 1;
+    if (counter == period - 1)
     begin
       counter <= 0;
       tone_out <= ~ tone_out;
 
@@ -13,5 +13,4 @@ tone #(32) t1(.CLK (CLK), .period (period_1khz), .tone_out (tone_1khz));
 tone #(32) t2(.CLK (CLK), .period (period_100hz), .tone_out (tone_100hz));
 tone #(32) t3(.CLK (CLK), .period (period_12khz), .tone_out (tone_12khz));
 
-
 endmodule
@@ -193,6 +193,7 @@
     <property xil_pn:name="Output Extended Identifiers" xil_pn:value="false" xil_pn:valueState="default"/>
     <property xil_pn:name="Output File Name" xil_pn:value="tone_tester" xil_pn:valueState="default"/>
     <property xil_pn:name="Overwrite Compiled Libraries" xil_pn:value="false" xil_pn:valueState="default"/>
+    <property xil_pn:name="Overwrite Existing Symbol" xil_pn:value="false" xil_pn:valueState="default"/>
     <property xil_pn:name="Pack I/O Registers into IOBs" xil_pn:value="Auto" xil_pn:valueState="default"/>
     <property xil_pn:name="Pack I/O Registers/Latches into IOBs" xil_pn:value="Off" xil_pn:valueState="default"/>
     <property xil_pn:name="Package" xil_pn:value="vq100" xil_pn:valueState="default"/>