diff --git a/AUTHORS b/AUTHORS
new file mode 100644
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--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1 @@
+fatmapper is written and maintained by Patrick Neumann <patrick@neumannsland.de>.
diff --git a/CHANGES b/CHANGES
new file mode 100644
index 0000000..00b00ad
--- /dev/null
+++ b/CHANGES
@@ -0,0 +1,21 @@
+Release 1.0 (in development)
+============================
+
+
+(Incompatible) changes
+----------------------
+
+* none
+
+
+Features added
+--------------
+
+* none
+
+
+Bugs fixed
+----------
+
+* none
+
diff --git a/doc/fatmapper_documentation.pdf b/doc/fatmapper_documentation.pdf
new file mode 100644
index 0000000..ab63946
Binary files /dev/null and b/doc/fatmapper_documentation.pdf differ
diff --git a/fatmapper.py b/fatmapper.py
new file mode 100755
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--- /dev/null
+++ b/fatmapper.py
@@ -0,0 +1,858 @@
+#!/usr/bin/env python2.7
+# -*- coding: utf-8 -*-
+
+"""Display general details of a FAT file system."""
+
+#===============================================================================
+#
+# FILE:
+#   ./fatmapper.py
+#
+# BASIC USAGE:
+#     $ ./fatmapper.py [-h|--help] [-o|--offset OFFSET] image
+#   OR
+#     $ python fatmapper.py [-h|--help] [-o|--offset OFFSET] image
+#
+# OPTIONS:
+#   -h,
+#   --help            show help message and exit
+#   -o OFFSET,
+#   --offset OFFSET   offset in sectors (default=0)
+#   image             raw image file (esp. dd)
+#
+# EXIT STATES:
+#    0 = success
+#    1 = Python version not tested/supported
+#    2 = image file does not exist
+#    3 = offset is not a positive integer
+#    4 = wrong or missing data in dictionary
+#    5 = empty image file
+#    6 = image file smaller than offset
+#    7 = invalid vbr signatures
+#
+# REQUIREMENTS:
+#   python2.7
+#
+# NOTES:
+#   Tested on:
+#     - ArchLinux (64-Bit) + python 2.7.13
+#     - Raspbian GNU/Linux 8.0 (32-Bit) + python 2.7.9
+#     - macOS (10.12.3) + python 2.7.10
+#     - Bash on Ubuntu on Windows 10 (64-Bit) + python 2.7.6
+#   with:
+#     - raw images
+#     - filesystem(s) in partition(s)
+#     - filesystem without a partition
+#     - no partition/no filesystem (empty file)
+#     - invalid filesystem
+#     - FAT12, FAT16 and FAT32
+#
+# WARRANTY:
+#   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 LICENSE file for more details.
+#
+# HISTORY:
+#   See the CHANGES file for more details.
+#
+#===============================================================================
+
+#=== MODULES ===================================================================
+
+import argparse
+import hashlib
+import os
+import os.path
+import re
+import struct
+import sys
+
+#=== INFO ======================================================================
+
+"""@author: Patrick Neumann
+@contact:   patrick@neumannsland.de
+@copyright: Copyright (C) 2017, Patrick Neumann
+@license:   GNU General Public License 3.0
+@date:      2017-03-26
+@version:   1.0.0
+@status:    Development
+"""
+
+#=== CHECKS ====================================================================
+
+"""Only tested with Python versions 2.7.9, 2.7.10 and 2.7.13!
+
+Python 3.x is not supported!
+"""
+
+if sys.version_info < (2, 7, 0):
+    sys.stderr.write("Sorry, your Python version was not tested but may work?\n")
+    sys.exit(1)
+
+if sys.version_info >= (3, 0, 0):
+    sys.stderr.write("Error: Python 3.x is not supported!\n")
+    sys.exit(1)
+
+#=== FUNCTIONS =================================================================
+
+# This is a private module function only for the other module functions.
+# Unfortunately, the underscore does not prevent other developers from using
+#   it directly from outside this module. :-(
+# sphinx-apidoc does ignore it. :-)
+def _checkimage(_file):
+    """Check image file.
+
+    Check if the image is a existing file.
+
+    Parameters
+    ----------
+    _file : str
+        path to the image file.
+
+    Raises
+    ------
+    Exits if the image does not exist.
+    """
+
+    if not os.path.isfile(_file):
+        sys.stderr.write("Error: image file does not exist!\n")
+        sys.exit(2)
+
+#-------------------------------------------------------------------------------
+
+# This is a private module function only for the other module functions.
+# Unfortunately, the underscore does not prevent other developers from using
+#   it directly from outside this module. :-(
+# sphinx-apidoc does ignore it. :-)
+def _checkoffset(loffset):
+    """Check offset.
+
+    Check if the offset is an integer and is equal or greater than zero.
+
+    Parameters
+    ----------
+    loffset : int
+        offset in bytes in the image file.
+
+    Raises
+    ------
+    Exits if the offset is not equal or greater than zero.
+    """
+
+    if not isinstance(loffset, int):
+        sys.stderr.write("Error: offset is not an integer!\n")
+        sys.exit(3)
+
+    if not loffset >= 0:
+        sys.stderr.write("Error: offset is not equal or greater zero!\n")
+        sys.exit(3)
+
+#-------------------------------------------------------------------------------
+
+# This is a private module function only for the other module functions.
+# Unfortunately, the underscore does not prevent other developers from using
+#   it directly from outside this module. :-(
+# sphinx-apidoc does ignore it. :-)
+def _checkdict(check, _dict):
+    """Check dictionary.
+
+    Check if the dictionary contains all needed data and that the data has
+    the right type.
+
+    Parameters
+    ----------
+    check : dict)
+        dictionary with necessary keys and types of the data dictionary.
+
+    _dict : dict
+        dictionary with mapping of parts of a fat VBR to a human readable index.
+
+    Raises
+    ------
+    Exits if the data dictionary does not contain the necessary keys or the
+    type of data is incorrect.
+    """
+
+    for key, var in check.items():
+        if not key in _dict:
+            sys.stderr.write("Error: necessary data is missing in dictionary!\n")
+            sys.exit(4)
+        # attention: on 32-Bit systems there is more often used long
+        #   where on 64-Bit systems is int big enough:
+        if not isinstance(_dict[key], var):
+            sys.stderr.write("Error: invalid type of data in dictionary!\n")
+            sys.exit(4)
+
+#-------------------------------------------------------------------------------
+
+# This is a private module function only for the other module functions.
+# Unfortunately, the underscore does not prevent other developers from using
+#   it directly from outside this module. :-(
+# sphinx-apidoc does ignore it. :-)
+def _getargs():
+    """Get command line arguments.
+
+    Parses the command line arguments, checks and return them.
+
+    Returns
+    -------
+    tuple
+        A tuple containing the checked path to the image file
+        and the offset in bytes in the image file calculated from sectors.
+
+        The default offset is 0.
+
+        For example:
+            ( "fat12_in_partition.dd", 1048576 )
+    """
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument("image",
+                        type=str,
+                        help="raw image file (esp.: image.dd)")
+    parser.add_argument("-o",
+                        "--offset",
+                        type=int,
+                        default=0,
+                        help="offset in sectors (default=0)")
+    args = parser.parse_args()
+
+    _checkimage(args.image)
+    limage = args.image
+
+    _checkoffset(args.offset)
+    loffset = args.offset * 512
+
+    return (limage, loffset)
+
+#-------------------------------------------------------------------------------
+
+def getsize(_file, loffset):
+    """Get image file size.
+
+    Get size of the image file.
+
+    Parameters
+    ----------
+    _file : str
+        path to the image file.
+
+    loffset : int
+        offset in bytes in the image file.
+
+    Returns
+    -------
+    int
+        size of image file in bytes.
+
+    Raises
+    ------
+    Exits if image file is empty or smaller than offset.
+    """
+
+    _checkimage(_file)
+    _checkoffset(loffset)
+
+    lsize = os.stat(_file)[6]
+
+    if lsize == 0:
+        sys.stderr.write("Error: the image file is an empty file!\n")
+        sys.exit(5)
+
+    if lsize < loffset + 512:
+        sys.stderr.write("Error: size of the image file is smaller than offset (+ 512 byte)!\n")
+        sys.exit(6)
+
+    return lsize
+
+#-------------------------------------------------------------------------------
+
+def getmd5(_file):
+    """Get MD5 of image file.
+
+    Get MD5 digest in hex for the content of the image file.
+
+    Parameters
+    ----------
+    _file : str
+        path to the image file.
+
+    Returns
+    -------
+    str
+        MD5 digest in uppercase hex.
+    """
+
+    _checkimage(_file)
+
+    lfile = open(_file, "rb")
+    lmd5 = hashlib.md5(lfile.read()).hexdigest().upper()
+    lfile.close()
+
+    return lmd5
+
+#-------------------------------------------------------------------------------
+
+def checkvbr(_file, loffset):
+    """Check for FAT VBR.
+
+    Check for the existence of a valid FAT12/16/32 VBR.
+
+    Parameters
+    ----------
+    _file : str
+        path to the image file.
+
+    loffset : int
+        offset in bytes in the image file.
+
+    Returns
+    -------
+    str
+        file_system_type (FAT1X or FAT32)
+
+    Raises
+    ------
+    Exits if the VBR can not be verified as a FAT12/16/32 VBR.
+    """
+
+    _checkimage(_file)
+    _checkoffset(loffset)
+
+    lfile = open(_file, "rb")
+    lfile.seek(loffset + 38)
+    extended_signature = lfile.read(1)
+
+    if extended_signature == "\x29":
+        lfile.seek(15, 1)
+        file_system_type = lfile.read(8)
+        lfile.seek(448, 1)
+        vbr_signature = lfile.read(2)
+        file_system_type_switch = "FAT1X"
+    else:
+        lfile.seek(loffset + 66)
+        extended_signature = lfile.read(1)
+        lfile.seek(15, 1)
+        file_system_type = lfile.read(8)
+        lfile.seek(420, 1)
+        vbr_signature = lfile.read(2)
+        file_system_type_switch = "FAT32"
+    lfile.close()
+
+    condition1 = extended_signature == "\x29"
+    condition2 = re.search(r'FAT(1(2|6)|32)   ', file_system_type)
+    condition3 = vbr_signature == "\x55\xaa"
+
+    if not (condition1 and condition2 and condition3):
+        sys.stderr.write("Error: no valid FAT12/FAT16/FAT32 VBR found!\n")
+        sys.exit(7)
+
+    #print "fileSystemTypeSwitch:", fileSystemTypeSwitch
+
+    return file_system_type_switch
+
+#-------------------------------------------------------------------------------
+
+def getraw(_file, loffset):
+    """Get global data.
+
+    Read raw data from the VBR into a python dictionary.
+
+    Parameters
+    ----------
+    _file : str
+        path to the image file.
+
+    loffset : int
+        offset in bytes in the image file.
+
+    Returns
+    -------
+    dict
+        dictionary with mapping of parts of a fat VBR to a human readable index.
+
+        For example:
+
+            {"bytesPerSector": 512,
+             "sectorsPerCluster": 64,
+             "reservedSectors": 1,
+             "fatCopies": 2,
+             "rootDirectoryEntries": 1024,
+             "sectorsInPartition": 0,
+             "rawMediaDescriptor": 248,
+             "sectorsPerFat": 64,
+             "sectorsPerTrack": 32,
+             "numberOfHeads": 64,
+             "hiddenSectors": 0,
+             "largerSectorsInPartition": 260096}
+    """
+
+    _checkimage(_file)
+    _checkoffset(loffset)
+
+    keys = ["bytesPerSector", "sectorsPerCluster", "reservedSectors",
+            "fatCopies", "rootDirectoryEntries", "sectorsInPartition",
+            "rawMediaDescriptor", "sectorsPerFat", "sectorsPerTrack",
+            "numberOfHeads", "hiddenSectors", "largerSectorsInPartition"]
+
+    lfile = open(_file, "rb")
+    lfile.seek(loffset + 3) # just skip the jumpcode
+    oem_name_version = lfile.read(8)
+    raw = lfile.read(2 + 1 + 2 + 1 + 2 + 2 + 1 + 2 + 2 + 2 + 4 + 4)
+    values = struct.unpack_from("<HBHBHHBHHHII", raw)
+    _dict = dict(zip(keys, values))
+    _dict["oemNameVersion"] = oem_name_version
+    lfile.close()
+
+    #for k, v in _dict.items():
+    #  print k, ":", v
+
+    return _dict
+
+#-------------------------------------------------------------------------------
+
+def getraw1x(_file, loffset):
+    """Get FAT12/16 spezial data.
+
+    Read raw data from the VBR into a python dictionary.
+
+    Parameters
+    ----------
+    _file : str
+        path to the image file.
+
+    loffset : int
+        offset in bytes in the image file.
+
+    Returns
+    -------
+    dict
+        dictionary with mapping of parts of a fat VBR to a human readable index.
+
+        For example:
+
+            {"logicalDriveNumber": 128,
+                    "RESERVED": 0,
+                    "extendedSignature": 41,
+                    "rawVolumeSerialNumber": 549101972,
+                    "oemNameVersion": "mkfs.fat",
+                    "volumeLabel": "NO NAME    ",
+                    "rawFileSystemType": "FAT12   ",
+                    "vbrSignature": "\x55\xaa"}
+    """
+
+    _checkimage(_file)
+    _checkoffset(loffset)
+
+    keys = ["logicalDriveNumber", "RESERVED", "extendedSignature",
+            "rawVolumeSerialNumber"]
+
+    lfile = open(_file, "rb")
+    lfile.seek(loffset + 36) # just skip the global area
+    raw = lfile.read(1 + 1 + 1 + 4)
+    values = struct.unpack_from("<BBBI", raw)
+    _dict = dict(zip(keys, values))
+    _dict["volumeLabel"] = lfile.read(11)
+    _dict["rawFileSystemType"] = lfile.read(8)
+    lfile.seek(448, 1) # absolute offset 510 - actual offset 62 = relative offset 448
+    _dict["vbrSignature"] = lfile.read(2)
+    lfile.close()
+
+    #for k, v in _dict.items():
+    #  print k, ":", v
+
+    return _dict
+
+#-------------------------------------------------------------------------------
+
+def getraw32(_file, loffset):
+    """Get FAT32 spezial data.
+
+    Read raw data from the VBR into a python dictionary.
+
+    Parameters
+    ----------
+    _file :str
+        path to the image file.
+
+    loffset : int
+        offset in bytes in the image file.
+
+    Returns
+    -------
+    dict
+        dictionary with mapping of parts of a fat VBR to a human readable index.
+
+        For example:
+
+            {"sectorsPerFat": 947,
+             "mirrorFlags": 0,
+             "fileSystemVersion": 0,
+             "firstClusterOfRootDirectory": 2,
+             "fsinfoSector": 1,
+             "backupBootSector": 6,
+             "logicalDriveNumber": 128,
+             "RESERVED": 0,
+             "extendedSignature": 41,
+             "rawVolumeSerialNumber": 774266948,
+             "volumeLabel": "NO NAME    ",
+             "rawFileSystemType": "FAT32   ",
+             "vbrSignature": "\x55\xaa"}
+    """
+
+    _checkimage(_file)
+    _checkoffset(loffset)
+
+    keys1 = ["sectorsPerFat", "mirrorFlags", "fileSystemVersion",
+             "firstClusterOfRootDirectory", "fsinfoSector", "backupBootSector"]
+    keys2 = ["logicalDriveNumber", "RESERVED", "extendedSignature",
+             "rawVolumeSerialNumber"]
+    lfile = open(_file, "rb")
+    lfile.seek(loffset + 36) # just skip the global area
+    raw1 = lfile.read(4 + 2 + 2 + 4 + 2 + 2)
+    values1 = struct.unpack_from("<IHHIHH", raw1)
+    _dict = dict(zip(keys1, values1))
+    lfile.seek(12, 1)
+    raw2 = lfile.read(1 + 1 + 1 + 4)
+    values2 = struct.unpack_from("<BBBI", raw2)
+    _dict.update(dict(zip(keys2, values2)))
+    _dict["volumeLabel"] = lfile.read(11)
+    _dict["rawFileSystemType"] = lfile.read(8)
+    lfile.seek(420, 1) # absolute offset 510 - actual offset 90 = relative offset 420
+    _dict["vbrSignature"] = lfile.read(2)
+    lfile.close()
+
+    #for k, v in _dict.items():
+    #  print k, ":", v
+
+    return _dict
+
+#-------------------------------------------------------------------------------
+
+def transform(_dict):
+    """Transform data.
+
+    Do some modifications to the raw data.
+
+    Parameters
+    ----------
+    _dict : dict
+        dictionary with mapping of parts of a fat VBR to a human readable index.
+
+    Returns
+    -------
+    dict
+        dictionary with mapping of transformed parts of a fat VBR to a human
+        readable index.
+    """
+
+    check = {"bytesPerSector": (int, long),
+             "sectorsPerCluster": (int, long),
+             "rawMediaDescriptor": (int, long),
+             "sectorsInPartition": (int, long),
+             "largerSectorsInPartition": (int, long),
+             "rawFileSystemType": str,
+             "rawVolumeSerialNumber": (int, long)}
+    _checkdict(check, _dict)
+
+    _dict["bytesPerCluster"] = _dict["bytesPerSector"] * _dict["sectorsPerCluster"]
+    if _dict["rawMediaDescriptor"] == 240:
+        _dict["mediaDescriptor"] = "floppy disk"
+    elif _dict["rawMediaDescriptor"] == 248:
+        _dict["mediaDescriptor"] = "hard disk"
+    else:
+        sys.stderr.write("Error: no valid media descriptor found!\n")
+        sys.exit(2)
+
+    if _dict["sectorsInPartition"] == 0:
+        _dict["sectorsInPartition"] = _dict["largerSectorsInPartition"]
+    _dict["fileSystemType"] = _dict["rawFileSystemType"][:3] + " " + _dict["rawFileSystemType"][3:]
+    _dict["volumeSerialNumber"] = "0x" + '{:08X}'.format(_dict["rawVolumeSerialNumber"])
+
+    #for k, v in _dict.items():
+    #  print k, ":", v
+
+    return _dict
+
+#-------------------------------------------------------------------------------
+
+def getrootdirsize32(_file, loffset, _dict):
+    """Get FAT32 root directory informations.
+
+    Read raw data about the root directory from the FAT32 VBR into a python dictionary.
+
+    Parameters
+    ----------
+    loffset : int
+        offset in bytes in the image file.
+
+    _dict :dict
+        dictionary with mapping of parts of a fat VBR to a human readable index.
+
+    Returns
+    -------
+    dict
+        dictionary with start, end and size of the root directory.
+    """
+
+    _checkoffset(loffset)
+    check = {"reservedSectors": (int, long),
+             "bytesPerSector": (int, long),
+             "firstClusterOfRootDirectory": (int, long),
+             "sectorsPerFat": (int, long),
+             "sectorsPerCluster": (int, long)}
+    _checkdict(check, _dict)
+
+    lfile = open(_file, "rb")
+    lfile.seek(loffset +
+               (_dict["reservedSectors"] * _dict["bytesPerSector"]) +
+               (_dict["firstClusterOfRootDirectory"] * 4))
+    raw = lfile.read(4)
+    cluster = struct.unpack_from("<I", raw)[0]
+    _min = _dict["firstClusterOfRootDirectory"]
+    _max = _min
+    counter = 1
+    while cluster >= 2 and cluster <= 268435446:
+        if cluster > _max:
+            _max = cluster
+        if cluster < _min:
+            _min = cluster
+        counter = counter + 1
+        _next = loffset + (_dict["reservedSectors"] * _dict["bytesPerSector"]) + (cluster * 4)
+        if not lfile.tell() == _next:
+            lfile.seek(_next - lfile.tell(), 1)
+        raw = lfile.read(4)
+        cluster = struct.unpack_from("<I", raw)[0]
+    lfile.close()
+
+    # In the FAT the root directory starts in the entry 2 (0 = label and 1 = reserved)
+    #   but in the data area it starts in cluster in the first (= 0)!
+    # To find the root directory in the FAT you have to use the entry in the VBR.
+    # To find the root directory in the data area you have to use the entry in the VBR - 2!
+    root_directory = {"rootDirectoryStartSector": _dict["reservedSectors"] +
+                                                  2 * _dict["sectorsPerFat"] + _min - 2,
+                      "rootDirectoryEndSector": _dict["reservedSectors"] +
+                                                2 * _dict["sectorsPerFat"] +
+                                                _max -
+                                                2 +
+                                                _dict["sectorsPerCluster"] -
+                                                1,
+                      "rootDirectorySize": counter * _dict["sectorsPerCluster"]}
+
+    #for k, v in rootDirectory.items():
+    #  print k, ":", v
+
+    return root_directory
+
+#-------------------------------------------------------------------------------
+
+def calculate(_file, loffset, _dict):
+    """Calcuate data.
+
+    Do some calculations with the raw/modified data.
+
+    Parameters
+    ----------
+    _dict : dict
+        dictionary with mapping of transformed parts of a fat VBR to
+        a human readable index.
+
+    Returns
+    -------
+    dict
+        dictionary with mapping of transformed parts and added calculations of
+        a fat VBR to a human readable index.
+    """
+
+    _checkoffset(loffset)
+    check = {"reservedSectors": (int, long),
+             "sectorsPerFat": (int, long),
+             "sectorsInPartition": (int, long),
+             "rootDirectoryEntries": (int, long),
+             "bytesPerSector": (int, long)}
+    _checkdict(check, _dict)
+
+    _dict["FAT0StartSector"] = _dict["reservedSectors"]
+    _dict["FAT0EndSector"] = _dict["reservedSectors"] + _dict["sectorsPerFat"] - 1
+    _dict["FAT1StartSector"] = _dict["FAT0EndSector"] + 1
+    _dict["FAT1EndSector"] = _dict["FAT1StartSector"] + _dict["sectorsPerFat"] - 1
+    _dict["DataAreaStartSector"] = _dict["FAT1EndSector"] + 1
+    _dict["DataAreaEndSector"] = _dict["sectorsInPartition"] - 1
+    _dict["DataAreaSize"] = _dict["sectorsInPartition"] - _dict["DataAreaStartSector"]
+    if _dict["rootDirectoryEntries"] != 0:
+        _dict["rootDirectoryStartSector"] = _dict["DataAreaStartSector"]
+        _dict["rootDirectorySize"] = _dict["rootDirectoryEntries"] * 32 / _dict["bytesPerSector"]
+        _dict["rootDirectoryEndSector"] = (_dict["DataAreaStartSector"] +
+                                           _dict["rootDirectorySize"] - 1)
+    else:
+        _dict.update(getrootdirsize32(_file, loffset, _dict))
+
+    #for k, v in _dict.items():
+    #  print k, ":", v
+
+    return _dict
+
+#-------------------------------------------------------------------------------
+
+def getlabel2(_file, loffset, _dict):
+    """Get FAT32 root directory data.
+
+    Read raw data about the label from the FAT32 root directory into a python dictionary.
+
+    Parameters
+    ----------
+    loffset : int
+        offset in bytes in the image file.
+
+    _dict : dict
+         dictionary with mapping of parts of a fat VBR to a human readable index.
+
+    Returns
+    -------
+    str
+        volume label from root directory
+    """
+
+    _checkoffset(loffset)
+    check = {"rootDirectoryStartSector": (int, long),
+             "bytesPerSector": (int, long)}
+    _checkdict(check, _dict)
+
+    lfile = open(_file, "rb")
+    lfile.seek(loffset + _dict["rootDirectoryStartSector"] * _dict["bytesPerSector"])
+    volume_label2 = lfile.read(11)
+    lfile.close()
+
+    #print "volumeLabel2:", volumeLabel2
+
+    return volume_label2
+
+#-------------------------------------------------------------------------------
+
+def main(_file, loffset, _dict):
+    """Print data.
+
+    Insert the data into the template and print it on stdout.
+
+    Parameters
+    ----------
+    _file : str
+        path to the image file.
+
+    loffset : int
+        offset in bytes in the image file.
+
+    _dict : dict
+        dictionary with mapping of transformed parts and added
+        calculations of a fat VBR to a human readable index.
+    """
+
+    _checkimage(_file)
+    _checkoffset(loffset)
+    check = {"size": (int, long),
+             "md5": str,
+             "volumeLabel": str,
+             "oemNameVersion": str,
+             "fileSystemType": str,
+             "volumeSerialNumber": str,
+             "bytesPerSector": (int, long),
+             "bytesPerCluster": (int, long),
+             "sectorsPerCluster": (int, long),
+             "sectorsInPartition": (int, long),
+             "fatCopies": (int, long),
+             "reservedSectors": (int, long),
+             "FAT0StartSector": (int, long),
+             "FAT0EndSector": (int, long),
+             "sectorsPerFat": (int, long),
+             "FAT1StartSector": (int, long),
+             "FAT1EndSector": (int, long),
+             "DataAreaStartSector": (int, long),
+             "DataAreaEndSector": (int, long),
+             "DataAreaSize": (int, long),
+             "rootDirectoryStartSector": (int, long),
+             "rootDirectoryEndSector": (int, long),
+             "rootDirectorySize": (int, long)}
+    _checkdict(check, _dict)
+
+    tpl24_1 = "{:<24}{}"
+    tpl24_1b = "{:<24}{} bytes"
+    tpl24_2 = "{:<24}{} bytes ({} Sectors)"
+    tpl24_3 = "{:<24}{} - {} ({} Sectors)"
+    tpl21 = "{:<21}{} - {} ({} Sectors)"
+    print "File Information"
+    print tpl24_1.format("-- Name:",
+                         _file)
+    print tpl24_1.format("-- File Size:",
+                         _dict["size"])
+    print tpl24_1.format("-- MD5:",
+                         _dict["md5"])
+    print
+    print "FS Information"
+    print tpl24_1.format("-- Volume Label:",
+                         _dict["volumeLabel"])
+    if _dict["fileSystemType"] == "FAT 32   ":
+        print tpl24_1.format("-- Volume Label #2:",
+                             getlabel2(_file, loffset, _dict))
+    print tpl24_1.format("-- OEM Name:",
+                         _dict["oemNameVersion"])
+    print tpl24_1.format("-- File System:",
+                         _dict["fileSystemType"])
+    print tpl24_1.format("-- Volume ID:",
+                         _dict["volumeSerialNumber"])
+    print
+    print tpl24_1b.format("-- Sector Size:",
+                          _dict["bytesPerSector"])
+    print tpl24_2.format("-- Cluster Size:",
+                         _dict["bytesPerCluster"],
+                         _dict["sectorsPerCluster"])
+    print tpl24_1.format("-- Number of Sectors:",
+                         _dict["sectorsInPartition"])
+    print tpl24_1.format("-- Number of FATs:",
+                         _dict["fatCopies"])
+    print tpl24_3.format("-- Total Range:",
+                         0,
+                         int(_dict["sectorsInPartition"]) - 1,
+                         _dict["sectorsInPartition"])
+    print
+    print "FS Layout"
+    print tpl21.format("-- Reserved:",
+                       0,
+                       int(_dict["reservedSectors"]) - 1,
+                       _dict["reservedSectors"])
+    print tpl21.format("---- VBR:", 0, 0, 1)
+    print tpl21.format("-- FAT 0:",
+                       _dict["FAT0StartSector"],
+                       _dict["FAT0EndSector"],
+                       _dict["sectorsPerFat"])
+    print tpl21.format("-- FAT 1:",
+                       _dict["FAT1StartSector"],
+                       _dict["FAT1EndSector"],
+                       _dict["sectorsPerFat"])
+    print tpl21.format("-- Data Area:",
+                       _dict["DataAreaStartSector"],
+                       _dict["DataAreaEndSector"],
+                       _dict["DataAreaSize"])
+    print tpl21.format("---- Root Dir:",
+                       _dict["rootDirectoryStartSector"],
+                       _dict["rootDirectoryEndSector"],
+                       _dict["rootDirectorySize"])
+
+#=== MAIN ======================================================================
+
+if __name__ == '__main__':
+    (IMAGE, OFFSET) = _getargs()
+    SIZE = getsize(IMAGE, OFFSET) # has to be done after _getargs()!
+    SWITCH = checkvbr(IMAGE, OFFSET)
+    DATA = getraw(IMAGE, OFFSET)
+    if SWITCH == "FAT1X":
+        DATA.update(getraw1x(IMAGE, OFFSET))
+    else:
+        DATA.update(getraw32(IMAGE, OFFSET))
+    DATA["size"] = SIZE
+    DATA["md5"] = getmd5(IMAGE)
+    DATA = transform(DATA)
+    DATA = calculate(IMAGE, OFFSET, DATA)
+    main(IMAGE, OFFSET, DATA)
+    sys.exit(0)
diff --git a/fatmapper_dict_missing_data.py b/fatmapper_dict_missing_data.py
new file mode 100755
index 0000000..f6199cc
--- /dev/null
+++ b/fatmapper_dict_missing_data.py
@@ -0,0 +1,12 @@
+#!/usr/bin/env python2.7
+# -*- coding: utf-8 -*-
+
+# Only a short python script to provoke exit state 4 of the fatmapper module!
+
+import fatmapper
+
+empty = {}
+
+fatmapper.transform( empty )
+
+sys.exit( 0 )
\ No newline at end of file
diff --git a/fatmapper_dict_wrong_type.py b/fatmapper_dict_wrong_type.py
new file mode 100755
index 0000000..668f2a5
--- /dev/null
+++ b/fatmapper_dict_wrong_type.py
@@ -0,0 +1,18 @@
+#!/usr/bin/env python2.7
+# -*- coding: utf-8 -*-
+
+# Only a short python script to provoke exit state 4 of the fatmapper module!
+
+import fatmapper
+
+wrong = { "bytesPerSector": "string",
+          "sectorsPerCluster": "string",
+          "rawMediaDescriptor": "string",
+          "sectorsInPartition": "string",
+          "largerSectorsInPartition": "string",
+          "rawFileSystemType": 1,
+          "rawVolumeSerialNumber": "string" }
+
+fatmapper.transform( wrong )
+
+sys.exit( 0 )
\ No newline at end of file