--- nono/vm/human_mi.cpp	2026/04/29 17:05:11	1.1.1.2
+++ nono/vm/human_mi.cpp	2026/04/29 17:05:14	1.1.1.3
@@ -166,7 +166,7 @@ HumanMI::Dispatch()
 
 	if (r == false) {
 		// 未実装システムコール
-		putlog(0, "Unimplemented system call $%02X", scid);
+		putlog(0, "system call $%02X (NOT IMPLEMENTED)", scid);
 		RequestExit(0);
 		return false;
 	}