--- truecrypt/boot/windows/bootconfig.cpp	2018/04/24 16:49:04	1.1.1.1
+++ truecrypt/boot/windows/bootconfig.cpp	2018/04/24 16:55:18	1.1.1.2
@@ -1,7 +1,7 @@
 /*
  Copyright (c) 2008 TrueCrypt Foundation. All rights reserved.
 
- Governed by the TrueCrypt License 2.4 the full text of which is contained
+ Governed by the TrueCrypt License 2.5 the full text of which is contained
  in the file License.txt included in TrueCrypt binary and source code
  distribution packages.
 */
@@ -13,7 +13,31 @@ byte BootSectorFlags;
 byte BootLoaderDrive;
 byte BootDrive;
 bool BootDriveGeometryValid = false;
+bool PreventHiddenSystemBoot = false;
+
 DriveGeometry BootDriveGeometry;
 
 CRYPTO_INFO *BootCryptoInfo;
 Partition EncryptedVirtualPartition;
+
+Partition ActivePartition;
+Partition PartitionFollowingActive;
+uint64 HiddenVolumeStartUnitNo;
+uint64 HiddenVolumeStartSector;
+
+
+BiosResult UpdateBootSectorConfiguration (byte drive)
+{
+	AcquireSectorBuffer();
+
+	BiosResult result = ReadWriteMBR (false, drive);
+	if (result != BiosResultSuccess)
+		goto ret;
+
+	SectorBuffer[TC_BOOT_SECTOR_CONFIG_OFFSET] = BootSectorFlags;
+	result = ReadWriteMBR (true, drive);
+
+ret:
+	ReleaseSectorBuffer();
+	return result;
+}