--- nono/vm/tvram.cpp	2026/04/29 17:05:33	1.1.1.12
+++ nono/vm/tvram.cpp	2026/04/29 17:05:43	1.1.1.14
@@ -26,12 +26,8 @@ TVRAMDevice::TVRAMDevice()
 	ClearAlias();
 	AddAlias("TVRAM");
 
-	uint devlen = 512 * 1024;
-
 	// プレーン数は4枚固定
 	nplane = NPLANE;
-
-	mem.reset(new uint8[devlen]);
 }
 
 // デストラクタ
@@ -47,6 +43,13 @@ TVRAMDevice::Init()
 		return false;
 	}
 
+	constexpr uint devlen = 512 * 1024;
+	mem.reset(new(std::nothrow) uint8[devlen]);
+	if ((bool)mem == false) {
+		warnx("Cannot allocate %u bytes at %s", devlen, __method__);
+		return false;
+	}
+
 	videoctlr = GetVideoCtlrDevice();
 
 	// 加工済みパレットを取得