--- nono/vm/vicon.h	2026/04/29 17:04:28	1.1
+++ nono/vm/vicon.h	2026/04/29 17:04:32	1.1.1.2
@@ -35,11 +35,14 @@ class ViconDevice
 	const uint16 *GetPalette() const { return &palette.w[0]; }
 
  private:
-	uint32 read_r0();
-	uint32 read_r1H();
-	uint32 read_r1L();
-	uint32 read_r2H();
-	uint32 read_r2L();
+	// アドレスデコーダ
+	uint64 Decoder(uint32 addr) const;
+
+	uint32 read_r0() const;
+	uint32 read_r1H() const;
+	uint32 read_r1L() const;
+	uint32 read_r2H() const;
+	uint32 read_r2L() const;
 	void write_r0(uint32 data);
 	void write_r1H(uint32 data);
 	void write_r1L(uint32 data);
@@ -53,4 +56,4 @@ class ViconDevice
 	} palette {};
 };
 
-extern ViconDevice *gVicon;
+extern std::unique_ptr<ViconDevice> gVicon;