--- nono/vm/zram.h	2026/04/29 17:04:36	1.1.1.3
+++ nono/vm/zram.h	2026/04/29 17:05:11	1.1.1.6
@@ -4,18 +4,20 @@
 // Licensed under nono-license.txt
 //
 
+//
+// 3ポート共有 RAM
+//
+
 #pragma once
 
 #include "device.h"
-#include <mutex>
 
-class ZRAMDevice
-	: public IODevice
+class ZRAMDevice : public IODevice
 {
 	using inherited = IODevice;
  public:
 	ZRAMDevice();
-	~ZRAMDevice() override;
+	virtual ~ZRAMDevice() override;
 
 	uint64 Read8(uint32 addr) override;
 	uint64 Read16(uint32 addr) override;
@@ -30,10 +32,6 @@ class ZRAMDevice
 	uint64 Decoder(uint32 addr) const;
 
 	std::unique_ptr<uint8[]> ram {};
-
-	// アクセス競合を防ぐロック。
-	// Lance は裏スレッドからアクセスにくるので。
-	std::mutex mtx {};
 };
 
-extern std::unique_ptr<ZRAMDevice> gZRAM;
+extern ZRAMDevice *gZRAM;