--- nono/vm/crtc2.h	2026/04/29 17:05:17	1.1.1.9
+++ nono/vm/crtc2.h	2026/04/29 17:05:24	1.1.1.10
@@ -20,7 +20,7 @@ class CRTC2Device : public IODevice
 	using inherited = IODevice;
  public:
 	CRTC2Device();
-	virtual ~CRTC2Device() override;
+	~CRTC2Device() override;
 
 	bool Init() override;
 	void ResetHard(bool poweron) override;
@@ -28,9 +28,9 @@ class CRTC2Device : public IODevice
  protected:
 	// BusIO インタフェース
 	static const uint32 NPORT = 2;
-	uint64 Read(uint32 offset);
-	uint64 Write(uint32 offset, uint32 data);
-	uint64 Peek(uint32 offset);
+	busdata Read(uint32 offset);
+	busdata Write(uint32 offset, uint32 data);
+	busdata Peek(uint32 offset);
 
  private:
 	// 垂直表示期間イベント