--- nono/vm/sprite.h	2026/04/29 17:04:28	1.1
+++ nono/vm/sprite.h	2026/04/29 17:05:25	1.1.1.9
@@ -1,17 +1,21 @@
 //
 // nono
-// Copyright (C) 2017 isaki@NetBSD.org
+// Copyright (C) 2020 nono project
+// Licensed under nono-license.txt
+//
+
+//
+// スプライトコントローラ
 //
 
 #pragma once
 
 #include "device.h"
 
-class SpriteDevice
-	: public IODevice
+class SpriteDevice : public IODevice
 {
-	typedef IODevice inherited;
- private:
+	using inherited = IODevice;
+
 	static const int baseaddr = 0xeb0000;
 
 	struct sprite_scroll {
@@ -38,15 +42,15 @@ class SpriteDevice
 
  public:
 	SpriteDevice();
-	virtual ~SpriteDevice();
+	~SpriteDevice() 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);
+	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;
 
  private:
 	struct sprite_ctrl reg {};
-	uint8 *mem = NULL;
+	std::unique_ptr<uint8[]> mem {};
 };