1 files changed, 65 insertions, 0 deletions

diff --git a/firmware/test/fat/fat-mbr_sector.c b/firmware/test/fat/fat-mbr_sector.c
new file mode 100644
index 0000000000..f6b510cea5
--- /dev/null
+++ b/firmware/test/fat/fat-mbr_sector.c
@@ -0,0 +1,65 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Alan Korr
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include <fat.h>
+#include "fat-mbr_sector.h"
+
+// [Alan]:
+// I would like to draw your attention about the fact that SH1
+// cannot use misaligned address access so you must be very cautious
+// with structures stored in FAT32 partition because they come from
+// PC world where misaligned address accesses are usual and not
+// problematic. To avoid such a trouble, I decide to use special
+// structures where fields are moved in such a way they can be
+// accessed by SH1. It is possible thanks to the callback mechanism
+// I use for reading or writing from/to an ATA device in ata.h/c.
+// So don't be puzzled if those structures seem odd compared
+// with the usual ones from PC world. I use this mechanism for structures
+// 'partition_info', 'mbr_sector' and 'fsi_sector' for instance, but
+// not for structure 'bpb_sector' which is too much complex to handle
+// that way, I think.
+// By the way, SH1 is big endian, not little endian as PC is. 
+
+///////////////////////////////////////////////////////////////////////////////////
+// MBR SECTOR :
+///////////////
+//
+// 
+
+int __fat_get_mbr_sector_callback (struct __fat_mbr_sector *mbr_sector)
+  {
+    short *data = mbr_sector->data,*end;
+    for (end = mbr_sector->end; data < end; ++data)
+      *data = ata_get_word (0);
+    __fat_get_partition_table (mbr_sector->partition_table);
+    mbr_sector->signature = HI(ATAR_DATA);
+    return FAT_RETURN_SUCCESS;
+  }
+
+int __fat_put_mbr_sector_callback (struct __fat_mbr_sector *mbr_sector)
+  {
+    short const *data = mbr_sector->data,*end;
+    for (end = mbr_sector->end; data < end;)
+      HI(ATAR_DATA) = *data++;
+    __fat_put_partition_table (mbr_sector->partition_table);
+    ata_put_word (mbr_sector->signature,0);
+    return FAT_RETURN_SUCCESS;
+  }
+
+//
+///////////////////////////////////////////////////////////////////////////////////