1 files changed, 71 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3cpudt.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3cpudt.c
new file mode 100644
index 00000000..b4210da7
--- /dev/null
+++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3cpudt.c
@@ -0,0 +1,71 @@
+/* $Id: bs3cpudt.c $ */
+/** @file
+ * BS3Kit - Tests Bs3CpuDetect_rm.
+ */
+
+/*
+ * Copyright (C) 2007-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+
+#include "bs3kit.h"
+#include <stdio.h>
+#include <stdint.h>
+
+
+unsigned StoreMsw(void);
+#pragma aux StoreMsw = \
+    ".286" \
+    "smsw ax" \
+    value [ax];
+
+void LoadMsw(unsigned);
+#pragma aux LoadMsw = \
+    ".286p" \
+    "lmsw ax" \
+    parm [ax];
+
+int main()
+{
+    uint16_t volatile usCpu = Bs3CpuDetect_rm();
+    printf("usCpu=%#x\n", usCpu);
+    if ((usCpu & BS3CPU_TYPE_MASK) >= BS3CPU_80286)
+    {
+        printf("(42=%d) msw=%#x (42=%d)\n", 42, StoreMsw(), 42);
+        LoadMsw(0);
+        printf("lmsw 0 => msw=%#x (42=%d)\n", StoreMsw(), 42);
+    }
+    return 0;
+}
+