--- nono/vm/mpu.cpp	2026/04/29 17:05:54	1.1.1.18
+++ nono/vm/mpu.cpp	2026/04/29 17:05:59	1.1.1.19
@@ -58,11 +58,26 @@ MPUDevice::Init()
 }
 
 void
+MPUDevice::ResetHard(bool poweron)
+{
+	inherited::ResetHard(poweron);
+	last_vector = -1;
+}
+
+void
 MPUDevice::PowerOff()
 {
 	scheduler->StopEvent(exec_event);
 }
 
+int32
+MPUDevice::GetAndResetLastVector()
+{
+	auto vector = last_vector;
+	last_vector = -1;
+	return vector;
+}
+
 
 //
 // メイン MPU (680x0/88xx0) 共通部
@@ -104,12 +119,16 @@ MainMPUDevice::Init()
 		item.Err();
 		return false;
 	}
-	clock_nsec = 1000 * 1000 / clock_khz;
-	if (clock_nsec < 1) {
+	clock_tsec = 1_msec / clock_khz;
+	if (clock_tsec < 1) {
 		item.Err("Clock speed too high");
 		return false;
 	}
 
+	// キャッシュを無効にするテスト用。
+	force_disable_dcache = gConfig->Find("mpu-force-disable-dcache").AsBool();
+	force_disable_icache = gConfig->Find("mpu-force-disable-icache").AsBool();
+
 	scheduler->ConnectMessage(MessageID::MPU_TRACE_MAIN, this,
 		ToMessageCallback(&MainMPUDevice::TraceMessage));