@@ -203,10 +203,19 @@ set_fullscreen(int value, int win)

 static void

 set_borderless(int value)

 {

+	if(fullscreen) return;

 	borderless = value;

 	SDL_SetWindowBordered(emu_window, !value);

 }

+static void

+set_debugger(Uxn *u, int value)

+{

+	u->dev[0x0e] = value;

+	screen_fill(uxn_screen.fg, 0, 0, uxn_screen.width, uxn_screen.height, 0);

+	screen_redraw(u);

+}

+

 /* emulator primitives */

 int

@@ -403,7 +412,7 @@ handle_events(Uxn *u)

 			else if(event.key.keysym.sym == SDLK_F1)

 				set_zoom(zoom == 3 ? 1 : zoom + 1, 1);

 			else if(event.key.keysym.sym == SDLK_F2)

-				u->dev[0x0e] = !u->dev[0x0e];

+				set_debugger(u, !u->dev[0x0e]);

 			else if(event.key.keysym.sym == SDLK_F3)

 				capture_screen();

 			else if(event.key.keysym.sym == SDLK_F4)