--- nono/vm/gvram.cpp	2026/04/29 17:05:29	1.1.1.9
+++ nono/vm/gvram.cpp	2026/04/29 17:05:43	1.1.1.10
@@ -21,9 +21,6 @@ static const busdata wait = busdata::Wai
 GVRAMDevice::GVRAMDevice()
 	: inherited(OBJ_GVRAM)
 {
-	uint devlen = 0x20'0000;	// XXX とりあえず
-
-	mem.reset(new uint8[devlen]);
 }
 
 // デストラクタ
@@ -31,6 +28,20 @@ GVRAMDevice::~GVRAMDevice()
 {
 }
 
+// 初期化
+bool
+GVRAMDevice::Init()
+{
+	uint devlen = 0x20'0000;	// XXX とりあえず
+	mem.reset(new(std::nothrow) uint8[devlen]);
+	if ((bool)mem == false) {
+		warnx("Cannot allocate %u bytes at %s", devlen, __method__);
+		return false;
+	}
+
+	return true;
+}
+
 inline uint32
 GVRAMDevice::Decoder(uint32 addr) const
 {