From daad9d303b679e00ed222fa1b60e43fe6c540698 Mon Sep 17 00:00:00 2001
From: David Quintana <gigaherz@gmail.com>
Date: Wed, 9 Sep 2015 01:33:27 +0000
Subject: [PATCH] [FATTEN] * WHO ATE THAT 'b'?! WHO?! * The jump instruction is
 3 bytes long, not 2 (and dequick&dirtied a bit while at it).

svn path=/trunk/; revision=69137
---
 reactos/tools/fatten/fatfs/diskio.c | 2 +-
 reactos/tools/fatten/fatten.c       | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/reactos/tools/fatten/fatfs/diskio.c b/reactos/tools/fatten/fatfs/diskio.c
index c77dd2084f2..98d2aee57f0 100644
--- a/reactos/tools/fatten/fatfs/diskio.c
+++ b/reactos/tools/fatten/fatfs/diskio.c
@@ -30,7 +30,7 @@ DSTATUS disk_openimage(BYTE pdrv, const char* imageFileName)
         driveHandle[0] = fopen(imageFileName, "r+b");
         if (!driveHandle[0])
         {
-            driveHandle[0] = fopen(imageFileName, "w+");
+            driveHandle[0] = fopen(imageFileName, "w+b");
         }
 
         if (driveHandle[0] != NULL)
diff --git a/reactos/tools/fatten/fatten.c b/reactos/tools/fatten/fatten.c
index 429e2244c33..9e07172b944 100644
--- a/reactos/tools/fatten/fatten.c
+++ b/reactos/tools/fatten/fatten.c
@@ -232,8 +232,10 @@ int main(int oargc, char* oargv[])
             }
             else
             {
-                // Quick&dirty hardcoded length.
-                memcpy(buff + 2, temp + 2, 0x3E - 0x02);
+#define FAT16_HEADER_START 3
+#define FAT16_HEADER_END 62
+
+                memcpy(buff + FAT16_HEADER_START, temp + FAT16_HEADER_START, FAT16_HEADER_END - FAT16_HEADER_START);
             }
 
             if (disk_write(0, buff, 0, 1))