new file mode 100644
--- /dev/null
+++ b/scn2k/scn2k_impl.h
@@ -0,0 +1,118 @@
+#ifndef __SCN2k_IMPL_H__
+#define __SCN2k_IMPL_H__
+
+#include"scn2k.h"
+#include"window/widget.h"
+#include"window/event.h"
+#include<vector>
+#include<string>
+#include<map>
+#include<set>
+
+struct StackItem {
+	int scn_number;
+	int scn_pt;
+	StackItem(int number, int pt) : scn_number(number), scn_pt(pt) {}
+};
+
+struct SaveTitle {
+	virtual std::string operator()(int number) const = 0;
+};
+
+struct Scn2kMenu {
+	Cmd cmd;
+	class Scn2kMenuImpl* pimpl;
+	enum MenuType { MENU_LOAD, MENU_SAVE, MENU_CONFIG, MENU_BACKLOG, MENU_BACKLOG2};
+	MenuType type;
+	enum MenuStatus { MENU_CONTINUE=0, MENU_CMD=1, MENU_DELETE=2};
+	MenuStatus status;
+	void InitPanel(Event::Container& event, PicContainer& parent);
+	void InitTitle(const SaveTitle&);
+	void Cancel(void);
+	void Exec(Cmd& cmd);
+	void activate(void);
+	void deactivate(void);
+	Scn2kMenu(MenuType type, class Scn2k& scn_impl, const Flags& flags, Text& text, int system_version);
+	~Scn2kMenu();
+};
+
+struct Scn2kSaveTitle : SaveTitle {
+	const class Scn2k& impl;
+	std::string operator() (int number) const;
+	Scn2kSaveTitle(const Scn2k& _impl) : impl(_impl) {}
+};
+
+class Scn2k : Event::Time {
+	Event::Container& event;
+	PicContainer& parent;
+	AyuSysConfig& config;
+	WidMouseCursor* mcursor;
+	Flags flag;
+	Text text_exec;
+	Grp grp_exec;
+	int system_version;
+	SkipMode skip_mode;
+	int scn_number;
+	int scn_point;
+	enum {SCN_INFO=999999, SCN_INFO_MENU=10000001, SCN_INFO_LOCALS = 10000100, SCN_INFO_LOCALSTR = 10000200, SCN_INFO_RETSTR = 10000300}; // stack に積まれる特殊な番号
+
+	int save_scn, save_point;
+
+	char* script_start;
+	char* script_end;
+	const char* script;
+
+	int backlog_script_scn;
+	char* backlog_script_start;
+	char* backlog_script_end;
+
+	std::string window_title;
+	std::vector<StackItem> stack;
+	std::vector<std::string> stack_strbuffer;
+	std::vector<CmdSimplified> cmd_stack;
+	std::vector<std::string> rollback_save;
+	std::string new_rollback_save;
+	std::map<int, std::set<int> > text_readflag;
+	char* cmd_stack_str;
+	char cmd_stack_str_orig[32768];
+
+	Cmdtype dialog_type;
+	class WidDialog* dialog;
+	Scn2kMenu* menu;
+	bool menu_mouseshown;
+
+	Surface* mouse_surface;
+	int mouse_type;
+	int mouse_pressed;
+	void ShowCursor();
+	void HideCursor();
+
+	void SetSkipMode(SkipMode mode);
+
+	virtual void Elapsed(unsigned int current_time);
+
+	// セーブ関連
+	std::string MakeSaveFile(void) const;
+	bool StatSaveFile(int num, int& year, int& month, int& day, int& wday, int& hour,int& min, int& sec, int& msec, std::string& title) const;
+	void SaveImpl(std::string& s);
+	void LoadImpl(const char* s);
+	void Save(Cmd& cmd);
+	void Load(Cmd& cmd);
+	void SaveRollback(void);
+	void LoadRollback(Cmd& cmd);
+	void SaveSys(void);
+	void LoadSys(void);
+public:
+	Scn2k(Event::Container& _event, PicContainer& _parent, class MuSys& mu, AyuSysConfig& config);
+	~Scn2k();
+	static char* OpenScript(int scn_number, char*& end, int* call_vec, int& system_version);
+	bool ChangeScript(int scn_number, int call_no);
+	bool ReadCmdAt(Cmd& cmd, int scn, int pt);
+	void show_textwindow(int type);
+	void hide_textwindow(void);
+	void SysExec(Cmd& cmd);
+	bool SysWait(Cmd& cmd);
+
+	friend struct Scn2kSaveTitle;
+};
+#endif