From f7b82c11f2bd7bc060cda2ecba88992b8ce32188 Mon Sep 17 00:00:00 2001
From: Eric Kohl <eric.kohl@reactos.org>
Date: Thu, 21 Aug 2003 15:35:32 +0000
Subject: [PATCH] Fixed FAT16 bootcode install. Don't overwrite any valid BPB
 data.

svn path=/trunk/; revision=5722
---
 reactos/subsys/system/usetup/bootsup.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/reactos/subsys/system/usetup/bootsup.c b/reactos/subsys/system/usetup/bootsup.c
index 473041aba9b..a792f3b7b9d 100644
--- a/reactos/subsys/system/usetup/bootsup.c
+++ b/reactos/subsys/system/usetup/bootsup.c
@@ -1190,8 +1190,10 @@ InstallFat16BootCodeToDisk(PWSTR SrcPath,
     return(Status);
   }
 
-  /* Adjust bootsector (copy a part of the FAT BPB) */
-  memcpy((NewBootSector + 11), (OrigBootSector + 11), 51 /*fat BPB length*/);
+  /* Adjust bootsector (copy a part of the FAT16 BPB) */
+  memcpy((NewBootSector + 3),
+	 (OrigBootSector + 3),
+	 59);  /* FAT16 BPB length*/
 
   /* Free the original boot sector */
   RtlFreeHeap(ProcessHeap, 0, OrigBootSector);