--- nono/vm/tvram.h	2026/04/29 17:04:28	1.1.1.1
+++ nono/vm/tvram.h	2026/04/29 17:05:17	1.1.1.9
@@ -1,48 +1,72 @@
 //
 // nono
-// Copyright (C) 2017 isaki@NetBSD.org
+// Copyright (C) 2020 nono project
+// Licensed under nono-license.txt
+//
+
+//
+// TVRAM
 //
 
 #pragma once
 
-#include "device.h"
-#include <atomic>
+#include "planevram.h"
 
-class TVRAMDevice
-	: public IODevice
+class Renderer;
+
+class TVRAMDevice : public PlaneVRAMDevice
 {
-	typedef IODevice inherited;
- private:
+	using inherited = PlaneVRAMDevice;
+
 	static const int baseaddr = 0xe00000;
 
+	// プレーン数は4枚固定
+	static const int NPLANE = 4;
+
 	struct tvram {
 		bool sa;				// 同時アクセス
-		bool ap[4];				// 同時アクセスプレーン
+		bool ap[NPLANE];		// 同時アクセスプレーン
+		bool cp[NPLANE];		// ラスターコピー対象
+		bool men;				// アクセスマスクイネーブル
+		uint16 mask;			// アクセスマスク
 	};
 
  public:
 	TVRAMDevice();
-	virtual ~TVRAMDevice();
+	virtual ~TVRAMDevice() override;
 
-	virtual void ResetHard();
+	bool Init() override;
+	void ResetHard(bool poweron) 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);
+	uint64 Read8(uint32 addr) override;
+	uint64 Read16(uint32 addr) override;
+	uint64 Write8(uint32 addr, uint32 data) override;
+	uint64 Write16(uint32 addr, uint32 data) override;
+	uint64 Peek8(uint32 addr) override;
+	uint64 Poke8(uint32 addr, uint32 data) override;
+
+	void UpdateInfo(TextScreen&, int x, int y) const override;
+
+	void SetAccessPlane(uint16 data);
+	void SetAccessMask(uint16 data);
+	void SetScrollX(int x);
+	void SetScrollY(int y);
+	void RasterCopy(int src_ras, int dst_ras);
 
-	void set_crtc_21(uint16 data);
+ private:
+	// アドレスデコーダ
+	uint64 Decoder(uint32 addr) const;
 
-	bool Render(uint8 *);
+	inline void SetDirty(uint32 offset);
 
- private:
-	void Invalidate();
+	// X 方向にはみ出したときに対応する仮想画面の Y 座標を返す。
+	int GetWrapY(int y) const override;
 
-	uint8 *mem = NULL;
-	// XXX 実際には縦がこれ以上になる可能性はある
-	std::atomic<uint8> atomic_dirty[1024] {};
 	struct tvram tvram {};
+
+	Renderer *renderer {};
 };
 
-extern TVRAMDevice *gTVRAM;
+static inline TVRAMDevice *GetTVRAMDevice() {
+	return Object::GetObject<TVRAMDevice>(OBJ_PLANEVRAM);
+}