--- nono/vm/prom.h	2026/04/29 17:04:42	1.1.1.2
+++ nono/vm/prom.h	2026/04/29 17:04:53	1.1.1.4
@@ -8,6 +8,7 @@
 
 #include "ethernet.h"
 #include "rom.h"
+#include "stopwatch.h"
 
 class PROMDevice
 	: public ROMDevice
@@ -15,20 +16,27 @@ class PROMDevice
 	using inherited = ROMDevice;
  public:
 	PROMDevice();
-	~PROMDevice() override;
+	virtual ~PROMDevice() override;
 
 	bool Init() override;
 	bool PowerOn() override;
+	void ResetHard() override;
 
 	uint64 Read8(uint32 addr) override;
 	uint64 Write8(uint32 addr, uint32 data) override;
+	uint64 Write16(uint32 addr, uint32 data) override;
 	uint64 Write32(uint32 addr, uint32 data) override;
 
  private:
-	bool InitLuna();
+	bool InitLuna1();
 	bool InitLuna88k();
+	uint64 Write(uint32 addr);
 
-	uint64 start_time {};			// パフォーマンス測定用
+	// ROM->RAM 切り替え用フラグ。true なら ROM モード
+	bool isrom {};
+
+	// パフォーマンス測定用
+	Stopwatch sw {};
 };
 
 extern std::unique_ptr<PROMDevice> gPROM;