diff --git a/src/internal.cpp b/src/internal.cpp
index 40f6c73..c4dd5ed 100644
--- a/src/internal.cpp
+++ b/src/internal.cpp
@@ -50,18 +50,21 @@ namespace vkvm {
         lockSharedMemory();
         getRegisters()->layout_version = newValue;
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto setCharactersPerColumn(int newValue) -> void {
         lockSharedMemory();
         getRegisters()->characters_per_column = newValue;
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto setCharactersPerRow(int newValue) -> void {
         lockSharedMemory();
         getRegisters()->characters_per_row = newValue;
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto setMousePosition(int x, int y) -> void {
@@ -69,6 +72,7 @@ namespace vkvm {
         getRegisters()->mouse_pos_x = x;
         getRegisters()->mouse_pos_y = y;
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto buttonPressed(KeyCode keyCode) -> void {
diff --git a/src/vkvm.cpp b/src/vkvm.cpp
index 3d0455d..331ba6c 100644
--- a/src/vkvm.cpp
+++ b/src/vkvm.cpp
@@ -18,7 +18,6 @@ namespace vkvm {
     auto setDefaultValues() -> void {
         impl.localMemoryWarn = false;
         if (getSharedMemory() != nullptr) {
-            //set default values
             setMode(GraphicMode::RGB);
             setCharactersPerRow(60);
             setCharactersPerColumn(20);
@@ -67,7 +66,7 @@ namespace vkvm {
         if (x > getWidth() || y > getHeight()) {
             return false;
         }
-        lockSharedMemory();
+        //lockSharedMemory();
         auto reg = getRegisters();
         const int bitsPerPixel = 8;
 
@@ -111,7 +110,7 @@ namespace vkvm {
                 break;
             }
         }
-        unlockSharedMemory();
+        //unlockSharedMemory();
         return true;
     }
 
@@ -164,7 +163,7 @@ namespace vkvm {
     auto setText(std::string text) -> bool {
         lockSharedMemory();
         char *ptr = getTextArea();
-        for (int i = 0; i < text.size(); i++) {
+        for (int i = 0; i < static_cast<int>(text.size()); i++) {
             if (i < getCharactersPerColumn() * getCharactersPerRow()) {
                 ptr[i] = text[i];
             }
@@ -209,6 +208,7 @@ namespace vkvm {
         lockSharedMemory();
         getRegisters()->width_pixels = newValue;
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto getHeight() -> int {
@@ -219,6 +219,7 @@ namespace vkvm {
         lockSharedMemory();
         getRegisters()->height_pixels = newValue;
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto getMode() -> GraphicMode {
@@ -254,6 +255,7 @@ namespace vkvm {
             reg->graphicMode = newValue;
         }
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto getRedrawInterval() -> int {
@@ -264,6 +266,7 @@ namespace vkvm {
         lockSharedMemory();
         getRegisters()->autoRedrawInterval = newValue;
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto getTimerInterruptInterval() -> int {
@@ -274,6 +277,7 @@ namespace vkvm {
         lockSharedMemory();
         getRegisters()->timerInterruptInterval = newValue;
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto getBackgroundColor() -> Color {
@@ -284,6 +288,7 @@ namespace vkvm {
         lockSharedMemory();
         getRegisters()->background_color = newValue;
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto getForegroundColor() -> Color {
@@ -294,6 +299,7 @@ namespace vkvm {
         lockSharedMemory();
         getRegisters()->foreground_color = newValue;
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto getCharactersPerRow() -> int {
@@ -314,6 +320,7 @@ namespace vkvm {
         lockSharedMemory();
         getRegisters()->textMode_font = newValue.getId();
         unlockSharedMemory();
+        callEvent(EventType::UpdateControlRegisters);
     }
 
     auto getMousePosition() -> Coordinates {