--- nono/vm/opm.h	2026/04/29 17:05:17	1.1.1.6
+++ nono/vm/opm.h	2026/04/29 17:05:42	1.1.1.9
@@ -20,12 +20,12 @@ class OPMDevice : public IODevice
 {
 	using inherited = IODevice;
 
-	static const int baseaddr = 0xe90000;
+	static const uint32 baseaddr = 0xe90000;
 	static const uint64 clk = 250_nsec;		// 4MHz
 
  public:
 	OPMDevice();
-	virtual ~OPMDevice() override;
+	~OPMDevice() override;
 
 	bool Init() override;
 	void ResetHard(bool poweron) override;
@@ -33,18 +33,19 @@ class OPMDevice : 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 ReadPort(uint32 offset);
+	busdata WritePort(uint32 offset, uint32 data);
+	busdata PeekPort(uint32 offset);
+	bool PokePort(uint32 offset, uint32 data);
 
  private:
 	bool IsBusy() const;
 
 	int reg {};		// アクセスレジスタ番号
 
-	uint64 busy_origin;		// BUSY の起点時刻
-	uint64 busy_start;		// BUSY のアサート開始時刻
-	uint64 busy_end;		// BUSY のアサート終了時刻
+	uint64 busy_origin {};	// BUSY の起点時刻
+	uint64 busy_start {};	// BUSY のアサート開始時刻
+	uint64 busy_end {};		// BUSY のアサート終了時刻
 
 	ADPCMDevice *adpcm {};
 	FDCDevice *fdc {};