--- nono/vm/bt454.cpp	2026/04/29 17:05:10	1.1.1.7
+++ nono/vm/bt454.cpp	2026/04/29 17:05:14	1.1.1.8
@@ -98,7 +98,7 @@ BT454Device::Read(uint32 offset)
 		break;
 
 	 case 3:
-		putlog(0, "未実装 overlay レジスタ読み込み");
+		putlog(0, "Read Overlay Register (NOT IMPLEMENTED)");
 		data = 0xff;
 		break;
 
@@ -158,7 +158,7 @@ BT454Device::Write(uint32 offset, uint32
 		break;
 
 	 case 3:
-		putlog(0, "未実装 overlay レジスタ書き込み <- $%02x", data);
+		putlog(0, "Overlay Register <- $%02x (NOT IMPLEMENTED)", data);
 		break;
 
 	 default: