--- nono/vm/mpu.h	2026/04/29 17:05:28	1.1.1.15
+++ nono/vm/mpu.h	2026/04/29 17:05:41	1.1.1.16
@@ -44,6 +44,12 @@ class MPUDevice : public Device
 class MainMPUDevice : public MPUDevice
 {
 	using inherited = MPUDevice;
+ protected:
+	// CPU の実行状態
+	static const uint32 CPU_STATE_NORMAL	= 0;
+	static const uint32 CPU_STATE_STOP		= 1;
+	static const uint32 CPU_STATE_HALT		= 2;
+
  public:
 	MainMPUDevice();
 	~MainMPUDevice() override;
@@ -59,6 +65,9 @@ class MainMPUDevice : public MPUDevice
 	virtual uint32 GetLaddr() const = 0;
 	virtual uint32 GetPaddr() const = 0;
 
+	// CPU の実行状態 (uint32) を返す。
+	uint32 GetState() const noexcept { return cpu_state; }
+
 	// MPU 名を取得する。("MC68030" みたいなやつ、ログ名とは別)
 	virtual const char *GetMPUName() const = 0;
 
@@ -79,7 +88,13 @@ class MainMPUDevice : public MPUDevice
 
  protected:
 	void TraceMessage(MessageID, uint32);
-	virtual void SetTrace(bool trace_on) = 0;
+	virtual void SetTrace(bool enable) = 0;
+
+	// CPU の状態
+	void ChangeState(uint32 new_state);
+
+	// CPU の実行状態
+	uint32 cpu_state {};
 
 	uint clock_khz {};		// MPU クロック [kHz]
 	uint64 clock_nsec {};	// MPU クロック [nsec]