--- nono/vm/romemu_luna1.cpp	2026/04/29 17:04:50	1.1.1.1
+++ nono/vm/romemu_luna1.cpp	2026/04/29 17:04:53	1.1.1.2
@@ -230,19 +230,11 @@ Luna1PROMEmuDevice::Command()
 	// 1ワードごとに分解
 	strcpy(&buf[0], inputbuf.c_str());
 	char *p = &buf[0];
-	char *s = p;
-	while (*p != '\0') {
-		if (*p == ' ') {
-			*p++ = '\0';
-			arg.push_back(std::string(s));
-			s = p;
-		} else {
-			p++;
+	for (char *ap; (ap = strsep(&p, " ")) != NULL; ) {
+		if (*ap != '\0') {
+			arg.push_back(std::string(ap));
 		}
 	}
-	if (p != s) {
-		arg.push_back(std::string(s));
-	}
 	if (loglevel >= 1) {
 		for (int i = 0; i < arg.size(); i++) {
 			putmsgn("arg[%d]=|%s|", i, arg[i].c_str());