--- nono/vm/prom.h	2026/04/29 17:05:17	1.1.1.9
+++ nono/vm/prom.h	2026/04/29 17:05:28	1.1.1.11
@@ -17,25 +17,21 @@ class PROM0Device : public IODevice
 	using inherited = IODevice;
  public:
 	PROM0Device();
-	virtual ~PROM0Device() override;
+	~PROM0Device() override;
 
 	bool Init() override;
 	void ResetHard(bool poweron) override;
 
-	uint64 Read8(uint32 addr) override;
-	uint64 Read16(uint32 addr) override;
-	uint64 Read32(uint32 addr) override;
-	uint64 Write8(uint32 addr, uint32 data) override;
-	uint64 Write16(uint32 addr, uint32 data) override;
-	uint64 Write32(uint32 addr, uint32 data) override;
-	uint64 Peek8(uint32 addr) override;
+	busdata Read(busaddr addr) override;
+	busdata Write(busaddr addr, uint32 data) override;
+	busdata Peek1(uint32 addr) override;
 
  private:
 	// アドレスデコーダ
 	static uint32 Decoder(uint32 addr);
 
 	// 書き込みの共通部分
-	uint64 Write();
+	busdata Write();
 
 	IODevice *prom {};
 };
@@ -45,11 +41,11 @@ class PROMDevice : public ROMDevice
 	using inherited = ROMDevice;
  public:
 	PROMDevice();
-	virtual ~PROMDevice() override;
+	~PROMDevice() override;
 
 	bool Init() override;
 
-	int GetROMVer() const { return romver; }
+	uint GetROMVer() const { return romver; }
 
  private:
 	bool InitLuna1();
@@ -57,7 +53,7 @@ class PROMDevice : public ROMDevice
 
 	// PROM バージョン。
 	// 100倍した整数形式で持つ。0 ならバージョン不明。
-	int romver {};
+	uint romver {};
 };
 
 static inline PROM0Device *GetPROM0Device() {