M src/platform/qt/GameController.cpp → src/platform/qt/GameController.cpp

@@ -670,9 +670,14 @@ threadContinue();
 }
 
 void GameController::setUseBIOS(bool use) {
-	threadInterrupt();
+	if (use == m_useBios) {
+		return;
+	}
 	m_useBios = use;
-	threadContinue();
+	if (m_gameOpen) {
+		closeGame();
+		openGame();
+	}
 }
 
 void GameController::loadState(int slot) {

M src/platform/qt/Window.cpp → src/platform/qt/Window.cpp

@@ -1123,6 +1123,11 @@ skipBios->connect([this](const QVariant& value) {
 		m_controller->setSkipBIOS(value.toBool());
 	}, this);
 
+	ConfigOption* useBios = m_config->addOption("useBios");
+	useBios->connect([this](const QVariant& value) {
+		m_controller->setUseBIOS(value.toBool());
+	}, this);
+
 	ConfigOption* buffers = m_config->addOption("audioBuffers");
 	buffers->connect([this](const QVariant& value) {
 		emit audioBufferSamplesChanged(value.toInt());