--- nono/vm/test_busio.cpp	2026/04/29 17:04:32	1.1
+++ nono/vm/test_busio.cpp	2026/04/29 17:04:36	1.1.1.2
@@ -1,3 +1,9 @@
+//
+// nono
+// Copyright (C) 2020 nono project
+// Licensed under nono-license.txt
+//
+
 #include "header.h"
 #include <stdint.h>
 #include <vector>
@@ -89,7 +95,7 @@ class TestWordDev : public IODevice
 // expected[] の1エントリは1バイトを表す(WordDevの時も同様)。
 #define E ((uint64)-1)
 #define F (0xff)
-struct testdata {
+static struct testdata {
 	const char *name;
 	std::vector<uint64> expected;
 } testdata_b[] = {
@@ -109,6 +115,9 @@ struct testdata {
 	{ "BusIO_EB", {
 		E, 1, E, 2, E, 3, E, 4,  E, 1, E, 2, E, 3, E, 4,
 	} },
+	{ "BusIO_FB", {
+		F, 1, F, 2, F, 3, F, 4,  F, 1, F, 2, F, 3, F, 4,
+	} },
 	{ "BusIO_BFFF", {
 		1, F, F, F, 2, F, F, F,  3, F, F, F, 4, F, F, F,
 		1, F, F, F, 2, F, F, F,  3, F, F, F, 4, F, F, F,
@@ -232,7 +241,8 @@ main()
 	do_test<TestByteDev>(&testdata_b[2], new BusIO_BBBB<TestByteDev>());
 	do_test<TestByteDev>(&testdata_b[3], new BusIO_BE<TestByteDev>());
 	do_test<TestByteDev>(&testdata_b[4], new BusIO_EB<TestByteDev>());
-	do_test<TestByteDev>(&testdata_b[5], new BusIO_BFFF<TestByteDev>());
+	do_test<TestByteDev>(&testdata_b[5], new BusIO_FB<TestByteDev>());
+	do_test<TestByteDev>(&testdata_b[6], new BusIO_BFFF<TestByteDev>());
 
 	do_test<TestWordDev>(&testdata_w[0], new BusIO_W<TestWordDev>());
 	do_test<TestWordDev>(&testdata_w[1], new BusIO_WW<TestWordDev>());