--- nono/vm/lunakbd.cpp	2026/04/29 17:05:50	1.1.1.17
+++ nono/vm/lunakbd.cpp	2026/04/29 17:06:00	1.1.1.18
@@ -28,7 +28,7 @@ LunaKeyboard::LunaKeyboard()
 	led.resize(2);
 
 	monitor = gMonitorManager->Regist(ID_MONITOR_KEYBOARD, this);
-	monitor->func = ToMonitorCallback(&LunaKeyboard::MonitorUpdate);
+	monitor->SetCallback(&LunaKeyboard::MonitorScreen);
 	monitor->SetSize(40, 4);
 }
 
@@ -99,7 +99,7 @@ LunaKeyboard::MDDisconnect()
 
 // モニター
 void
-LunaKeyboard::MonitorUpdate(Monitor *, TextScreen& screen)
+LunaKeyboard::MonitorScreen(Monitor *, TextScreen& screen)
 {
 	int x;
 	int y;
@@ -447,7 +447,7 @@ LunaKeyboard::Command(uint32 data)
 			data, buzzer_msec, buzzer_freq);
 
 		uint64 now = scheduler->GetVirtTime();
-		buzzer_end = now + buzzer_msec * 1_msec;
+		buzzer_end = now + msec_to_nsec(buzzer_msec);
 		// VM スレッド内なので MakeKey() ではなく KeyInput() を直接呼ぶ
 		KeyInput(KC_buzzer | KC_FLAG_MAKE);
 		Start(2_msec);