--- nono/vm/areaset.h	2026/04/29 17:05:24	1.1.1.9
+++ nono/vm/areaset.h	2026/04/29 17:05:28	1.1.1.10
@@ -14,7 +14,7 @@ class AreaSetDevice : public IODevice
 {
 	using inherited = IODevice;
 
-	static const int baseaddr = 0xe86000;
+	static const uint32 baseaddr = 0xe86000;
 
  public:
 	AreaSetDevice();
@@ -23,11 +23,13 @@ class AreaSetDevice : public IODevice
 	bool Init() override;
 	void ResetHard(bool poweron) override;
 
-	busdata Read8(uint32 addr) override;
-	busdata Read16(uint32 addr) override;
-	busdata Write8(uint32 addr, uint32 data) override;
-	busdata Write16(uint32 addr, uint32 data) override;
-	busdata Peek8(uint32 addr) override;
+ protected:
+	// BusIO インタフェース
+	static const uint32 NPORT = 1;
+	busdata ReadPort(uint32 offset);
+	busdata WritePort(uint32 offset, uint32 data);
+	busdata PeekPort(uint32 offset);
+	bool PokePort(uint32 offset, uint32 data);
 
  private:
 	X68kIODevice *x68kio {};