--- nono/host/hostcom.cpp	2026/04/29 17:05:51	1.1.1.9
+++ nono/host/hostcom.cpp	2026/04/29 17:06:02	1.1.1.11
@@ -101,7 +101,7 @@ HostCOMDevice::HostCOMDevice(Device *par
 
 		// モニタは hostcom* のみ必要。
 		monitor = gMonitorManager->Regist(ID_MONITOR_HOSTCOM(n), this);
-		monitor->func = ToMonitorCallback(&HostCOMDevice::MonitorUpdate);
+		monitor->SetCallback(&HostCOMDevice::MonitorScreen);
 		monitor->SetSize(33, 17);
 	}
 }
@@ -131,18 +131,6 @@ HostCOMDevice::Create2()
 		return false;
 	}
 
-	// hostcom*-fallback は使わなくなったので、
-	// 初期値から変更されていれば警告だけ出す。
-	std::string key = GetConfigKey();
-	if (key != "debugger") {
-		const std::string fallback_key = key + "-fallback";
-		const ConfigItem& fallback_item = gConfig->Find(fallback_key);
-		if (fallback_item.GetFrom() != ConfigItem::FromInitial) {
-			warnx("Warning: option '%s' has been obsoleted.",
-				fallback_key.c_str());
-		}
-	}
-
 	if (SelectDriver(true) == false) {
 		return false;
 	}
@@ -422,7 +410,7 @@ HostCOMDevice::Write()
 }
 
 // ドライバ名を返す
-const std::string
+const std::string&
 HostCOMDevice::GetDriverName()
 {
 	RWLockGuard_Read guard(driverlock);
@@ -432,16 +420,17 @@ HostCOMDevice::GetDriverName()
 
 // モニタ
 void
-HostCOMDevice::MonitorUpdate(Monitor *, TextScreen& screen)
+HostCOMDevice::MonitorScreen(Monitor *, TextScreen& screen)
 {
 	screen.Clear();
 
 	screen.Print(0, 0, "Device(Port)  : %s", GetPortName().c_str());
 	{
 		RWLockGuard_Read gurad(driverlock);
-		screen.Print(0, 1, "HostCOM Driver: %s", driver->GetDriverName());
+		screen.Print(0, 1, "HostCOM Driver: %s",
+			driver->GetDriverName().c_str());
 		// 次の1行はドライバ依存情報
-		driver->MonitorUpdateMD(screen, 2);
+		driver->MonitorScreenMD(screen, 2);
 	}
 
 	int y = 4;