--- nono/vm/gvram.h	2026/04/29 17:04:28	1.1
+++ nono/vm/gvram.h	2026/04/29 17:05:41	1.1.1.10
@@ -1,28 +1,33 @@
 //
 // nono
-// Copyright (C) 2018 isaki@NetBSD.org
+// Copyright (C) 2020 nono project
+// Licensed under nono-license.txt
+//
+
+//
+// GVRAM
 //
 
 #pragma once
 
 #include "device.h"
 
-class GVRAMDevice
-	: public IODevice
+class GVRAMDevice : public IODevice
 {
-	typedef IODevice inherited;
+	using inherited = IODevice;
+	static const uint32 baseaddr = 0xc0'0000;
  public:
 	GVRAMDevice();
-	virtual ~GVRAMDevice();
+	~GVRAMDevice() override;
 
-	virtual uint64 Read8(uint32 addr);
-	virtual uint64 Read16(uint32 addr);
-	virtual uint64 Write8(uint32 addr, uint32 data);
-	virtual uint64 Write16(uint32 addr, uint32 data);
-	virtual uint64 Peek8(uint32 addr);
+	bool Init() override;
+
+	busdata Read(busaddr addr) override;
+	busdata Write(busaddr addr, uint32 data) override;
+	busdata Peek1(uint32 addr) override;
 
  private:
-	uint8 *mem = NULL;
-};
+	inline uint32 Decoder(uint32 addr) const;
 
-extern GVRAMDevice *gGVRAM;
+	std::unique_ptr<uint8[]> mem {};
+};