diff --git a/Code/devterm_keyboard_mini/devterm_keyboard_mini.ino b/Code/devterm_keyboard_mini/devterm_keyboard_mini.ino
index 3bbd148..ffa6f7b 100644
--- a/Code/devterm_keyboard_mini/devterm_keyboard_mini.ino
+++ b/Code/devterm_keyboard_mini/devterm_keyboard_mini.ino
@@ -6,7 +6,7 @@
 
 #include <USBComposite.h>
 
-#define SER_NUM_STR "20210531"
+#define SER_NUM_STR "20230307"
 
 USBHID HID;
 DEVTERM dev_term;
@@ -26,7 +26,7 @@ HardwareTimer ctrl_timer(4);
 
 void setup() {
   USBComposite.setManufacturerString("ClockworkPI");
-  USBComposite.setProductString("DevTerm");
+  USBComposite.setProductString("uConsole");
   USBComposite.setSerialString(SER_NUM_STR);
   
   dev_term.Keyboard = new HIDKeyboard(HID);
@@ -79,11 +79,12 @@ void setup() {
   timer.setPeriod(KEYBOARD_LED_PWM_PERIOD);
   timer.resume();
 
+  /*
   ctrl_timer.setPeriod(20*1000);
   ctrl_timer.attachInterrupt(1,ctrl_timer_handler);
   ctrl_timer.refresh();
   ctrl_timer.resume();
-  
+  */
   pinMode(PA8,PWM);
   pwmWrite(PA8,0);
 
diff --git a/Code/devterm_keyboard_mini/keymaps.ino b/Code/devterm_keyboard_mini/keymaps.ino
index c2df737..ad7eb38 100644
--- a/Code/devterm_keyboard_mini/keymaps.ino
+++ b/Code/devterm_keyboard_mini/keymaps.ino
@@ -227,6 +227,13 @@ void keyboard_action(DEVTERM*dv,uint8_t row,uint8_t col,uint8_t mode) {
         dv->Consumer->release();
       }
     }break;
+    case _VOLUME_MUTE:{
+      if(mode == KEY_PRESSED) {
+        dv->Consumer->press(HIDConsumer::MUTE);
+      }else {
+        dv->Consumer->release();
+      }
+    }break;    
     case _FN_LOCK_KEYBOARD:{
       if(mode == KEY_PRESSED) {
         dv->Keyboard_state.lock = dv->Keyboard_state.lock ^ 1;
@@ -235,8 +242,7 @@ void keyboard_action(DEVTERM*dv,uint8_t row,uint8_t col,uint8_t mode) {
     case _FN_LIGHT_KEYBOARD: {
       //dv->_Serial->println("light keyboard");
       if(mode == KEY_PRESSED) {
-        dv->Keyboard_state.backlight = ( dv->Keyboard_state.backlight + 1) % 4;
-        
+        dv->Keyboard_state.backlight = dv->Keyboard_state.backlight  % 4;
         pwmWrite(PA8,backlight[ dv->Keyboard_state.backlight ] );
         if(backlight[ dv->Keyboard_state.backlight ]== 0){
           timer.pause();
@@ -244,6 +250,7 @@ void keyboard_action(DEVTERM*dv,uint8_t row,uint8_t col,uint8_t mode) {
           timer.resume();
         }
         //dv->_Serial->println("light keyboard");
+         dv->Keyboard_state.backlight ++;
       }
     }break;
     case  _FN_KEY:
@@ -281,12 +288,12 @@ void keyboard_action(DEVTERM*dv,uint8_t row,uint8_t col,uint8_t mode) {
       }
     break;
   }
-
+  /*
   press_any_key_to_release_lock(dv,&dv->Keyboard_state.ctrl,k,mode);
   press_any_key_to_release_lock(dv,&dv->Keyboard_state.alt,k,mode);
   press_any_key_to_release_lock(dv,&dv->Keyboard_state.shift,k,mode);
   press_any_key_to_release_lock(dv,&dv->Keyboard_state.fn,k,mode);
-
+  */
 }
 
 
@@ -516,9 +523,10 @@ void keypad_action(DEVTERM*dv,uint8_t col,uint8_t mode) {
     default:break;
     
   }
-
+  /*
   press_any_key_to_release_lock(dv,&dv->Keyboard_state.ctrl,k,mode);
   press_any_key_to_release_lock(dv,&dv->Keyboard_state.alt,k,mode);
   press_any_key_to_release_lock(dv,&dv->Keyboard_state.shift,k,mode);
   press_any_key_to_release_lock(dv,&dv->Keyboard_state.fn,k,mode); 
+  */
 }
diff --git a/Code/devterm_keyboard_mini/trackball.h b/Code/devterm_keyboard_mini/trackball.h
index cc75212..277f85b 100644
--- a/Code/devterm_keyboard_mini/trackball.h
+++ b/Code/devterm_keyboard_mini/trackball.h
@@ -12,10 +12,10 @@
 #define EXPONENTIAL_BASE      1.2
 */
 
-#define RIGHT_PIN             HO3
-#define LEFT_PIN              HO1
-#define DOWN_PIN              HO4
-#define UP_PIN                HO2
+#define RIGHT_PIN             HO2
+#define LEFT_PIN              HO4
+#define DOWN_PIN              HO3
+#define UP_PIN                HO1
 
 
 void trackball_init(DEVTERM*);