--- nono/vm/sprite.cpp	2026/04/29 17:04:28	1.1
+++ nono/vm/sprite.cpp	2026/04/29 17:04:36	1.1.1.3
@@ -1,6 +1,7 @@
 //
 // nono
-// Copyright (C) 2017 isaki@NetBSD.org
+// Copyright (C) 2020 nono project
+// Licensed under nono-license.txt
 //
 
 #include "sprite.h"
@@ -13,12 +14,11 @@ SpriteDevice::SpriteDevice()
 	devaddr = baseaddr;
 	devlen  = 0x010000;
 
-	mem = (uint8 *)malloc(4 * 8192);
+	mem.reset(new uint8[4 * 8192]);
 }
 
 SpriteDevice::~SpriteDevice()
 {
-	free(mem);
 }
 
 uint64