






                              ----FAR--DARTER---->
                                s o f t w a r e

                                    Presents


                       _____________      ____        ____
                      |             |      ____      ____
                      |    _________|       ____    ____
                      |   |                  ____  ____
                      |   |_______            ________
                      |           |            ______
                      |    _______|             ____
                      |   |                    ______
                      |   |                   ________
                      |   |                  ____  ____
                      |   |                 ____    ____
                      |   |                ____      ____
                      |___|               ____        ____


                      F  i  l  e     e  X  a  m  i  n  e  r





                         ******************************
                         *                            *
                         *     User Documentation     *
                         *                            *
                         *        Version 1.1         *
                         *                            *
                         ******************************





                          Copyright 1990 William Noble
                              All Rights Reserved


     









                                    LIMIT OF LIABILITY



                         FX  is   distributed  as-is.     The   author
                         disclaims  all   warranties,   expressed   or
                         implied.  The author will assume no liability
                         for damages  either from  the direct  use  of
                         this product  or as  a consequence of the use
                         of this product, nor be liable for any damage
                         to data  or  property  which  may  be  caused
                         either directly  or indirectly, intentionally
                         or unintentionally,  from  the  use  of  this
                         product.





                  ______________________________________________________


                         FX  was   designed  for  the  legal  and
                         legitimate  examination  and  repair  of
                         personal files.   It was NOT designed to
                         alter  programs   or  files   that   are
                         copyrighted   or    owned    by    other
                         individuals or  companies!  Doing so may
                         very well  be illegal,  and will  at the
                         least  probably  void  any  warranty  or
                         other  legal   rights  extended  to  the
                         purchaser of  the programs or files thus
                         affected.   The author can not, and will
                         not,  assume   any   responsibility   or
                         liability for those who use this program
                         irresponsibly!

                  ______________________________________________________
                                             








                                        Shareware



               FX is  distributed as  shareware, which  affords  users  the
               opportunity to  evaluate programs BEFORE they are purchased.
               If the  program is  then judged  effective and practical for
               individual needs  and is  used regularly,  one registers the
               program with the author.

               If you  use FX  on a regular basis and find it a functional,
               worthwhile program,  we sincerely  hope you will register in
               keeping with  the philosophy  and practice of user-supported
               software.  The basic single-user registration fee we request
               is $15.   (Please  see the end of the documentation for full
               registration details).   FX, like most shareware, required a
               substantial amount  of time and skill to design and program,
               and is,  we feel,  on  a  par  with  commercially  available
               packages in all respects.

               Regardless of  whether you  register your  copy  of  FX,  we
               encourage you  to copy  it and  pass it along to friends and
               acquaintances  for  their  own  evaluation  and  trial  use!
               (Needless to  say, all  copies made are understood to be for
               the non-commercial, private trial use of others).

               Consistent with  the custom  of user-supported software, you
               may receive  a copy  of FX  by sending us a blank, formatted
               disk together with an addressed, POSTAGE PAID return mailer.
               The FX program and documentation on disk will be mailed back
               on your diskette.










                                Trademark Acknowledgments



                         dBASE is  a registered  trademark of  Ashton-
                         Tate Corporation.

                         Epson MX  is a  trademark of  Epson  America,
                         Inc.

                         IBM and  IBM PC  are registered trademarks of
                         International Business Machines Corporation.

                         Microsoft, Microsoft  C, Microsoft C Compiler
                         and  MS-DOS   are  registered  trademarks  of
                         Microsoft Corporation.

                         Turbo  Assembler   (TASM)  is   a  registered
                         trademark of Borland International, Inc.
                         



                                      Contents





               Introduction                                       1
               FX Quick Start                                     2
               Hardware Requirements                              3
               Mouse Support                                      3
               Installation                                       4
               Invoking FX                                        4
               Using Menus and Input Areas                        8
               Using the Numeric Entry Box                        8
               Basic Concepts                                    10
               Using FX- Overview                                11
                        Moving through the File                  11
                        Selecting Display Modes                  12
                        Synopsis of FX Commands                  13
               The Major FX Functions                            15
                        Selecting a File To Examine              15
                        Locating Byte Patterns                   16
                        Counting Byte Patterns                   18
                        Modifying a File Byte                    18
                        Jumping Directly to Any Byte             18
                        DOS Shell                                19
               Major Display Formatting Options                  20
                        Changing the Display Mode                20
                        Selecting the Numeric Display            22
                        Toggling Hexadecimal Status Line Notation24
                        Optimizing the Display for ".DBF" Files  24
               Understanding The FX Display                      26
                        StartByte                                27
                        Recsize                                  27
                        Tab Amount                               28
                        File Byte                                28
                        Record                                   28
                        Recbyte                                  29
                        Modified                                 29
               Using FX with dBASE database files                30
                        Examining the field definitions          31
                        Examining the data                       32
               Summary of FX Messages                            33
               Error Handling                                    36
               FX Command Summary                                37
               Notes                                             38
               FX Registration Information                        A


          FX User Documentation                                 Version 1.1
          _________________________________________________________________




          Introduction


          FX (File  eXaminer) is  a general-purpose  file viewer and "byte-
          zap" utility.   It can handle any file possible under MS-DOS, and
          of unlimited size; it is neither constrained by nor optimized for
          any particular  file format,  whether that be ASCII text, binary,
          etc.   This program  was designed  to be  as fast,  flexible  and
          reliable as  possible, working  as a sort of "byte-oriented" word
          processor.   Note that FX enables viewing and modification of the
          ENTIRE contents  of  a  file,  INCLUDING  any  end-of-file  marks
          (Control-Z, ASCII value 26 decimal).

          Please note  that FX will not insert bytes or remove bytes-- only
          modify existing  ones.   In addition,  FX  does  not  create  any
          "temporary" or  "intermediate" files--  one is  working  DIRECTLY
          against the  selected file!   If  it is  planned to modify bytes,
          (especially in  an executable file), and there is the least doubt
          about the  impact of  the changes,  WORK WITH A COPY OF THE FILE,
          AND NOT THE ORIGINAL!

          Be assured  that FX  is completely  safe to  use on ANY file-- it
          will  not  modify  any  aspect  of  a  file  unless  specifically
          requested to  do so,  and doing  so requires  an overt, conscious
          decision  by   the  user.     Unintentional  changes  are  almost
          impossible.   If there  is the  least doubt, however, it is again
          strongly recommended the file be backed up first.


          Any of the following tasks may be easily accomplished with FX:

               -    Scroll through and examine ANY portion of ANY file
                    as  if   it  were   a  word  processing  document,
                    displaying the  data in  any mix of ASCII, decimal
                    or hexadecimal notation.

               -    Locate or Count byte patterns.

               -    Format the  display to  expose the underlying file
                    structure.

               -    Modify any  byte in  any file,  regardless of  its
                    location.

               -    Read  PAST   any  end-of-file  marks,  (Control-Z,
                    decimal ASCII  26), right to the end of the file's
                    physical extent as recorded by DOS.

               -    Continuously watch  the value of the byte, integer
                    and long  integer at any file position in terms of
                    decimal, hexadecimal or binary notation.



          _________________________________________________________________
          (C) 1990, William Noble                                    Page 1


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Typical uses of FX include:

               -    Repairing damaged files.

               -    Removing intermediate  end-of-file marks  in  text
                    files that  prevent access to the full contents of
                    the file.

               -    Scanning executable  code for  messages indicative
                    of  a   program  with   "ulterior  motives",  e.g.
                    "Viruses" and the like.

               -    Customizing  executable  programs.    Many  ".COM"
                    programs are  accompanied by a discussion of which
                    bytes to  modify to customize their display colors
                    and other configuration options.  (Typically, this
                    is done  using the  "DEBUG" program, but FX is far
                    easier to use and better suited to such a task).

               -    Programmers can  use FX to inspect and debug files
                    created by their own programs.

               -    Deciphering foreign file formats.



          FX Quick Start


          FX is  started simply  by issuing  the command "FX".  FX can also
          accept a  number  of  wholly  optional  command-line  parameters.
          Please refer to the section "Invoking FX" for full details.

          Once FX  is running,  ALT-H will  pop up  the help  screen at any
          point in  the program.  Also, hitting the forward slash key ("/")
          will invoke the FX command menu, which may be used to familiarize
          oneself with, and optionally invoke, FX commands.



















          _________________________________________________________________
          (C) 1990, William Noble                                    Page 2


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Hardware Requirements


          FX will  run on  any IBM PC or true compatible running DOS 3.0 or
          higher, and  should certainly  run without  incident  on  a  256K
          system.  (FX will require about 200K available memory to run).

          FX automatically  detects and  adapts to  a monochrome  or  color
          system, and  selects 25  by 80  text mode  if the  system is  not
          already in  this mode.   (FX  restores the  video mode and cursor
          size upon exit).

          Since the  program writes  directly to  video memory for the best
          possible performance, it also accounts for CGA monitors and takes
          the proper measures to avoid the "snow" effect.

          Note to  Network Users:  This program was designed to function in
          network, as  well as  single-user, environments.   FX  opens  all
          files in  accord with  the SHARE  program.   This has  no  impact
          whatsoever on  single-user systems,  or on  systems  not  running
          SHARE.   However, if  SHARE is  installed, then note that FX will
          open all  files as "Deny Write"; that is, other programs can read
          from a  file in use by FX, but NOT write to it.  A file is opened
          by FX  when it is selected with the FILE command, and closed only
          when another file is chosen or the program is exited.



          Mouse Support


          FX will  automatically detect  and support a Microsoft-compatible
          mouse, if  installed.   FX neither  uses nor  displays  a  "mouse
          cursor", but  instead translates  the relative  movement  of  the
          mouse into  an equivalent  press of  the up, down, left and right
          arrow keys.   Moving  the mouse  up, for instance, is the same as
          repeatedly pressing the up-arrow key.

          Clicking BOTH buttons simultaneously and releasing them is always
          equivalent to pressing ESCAPE.
















          _________________________________________________________________
          (C) 1990, William Noble                                    Page 3


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          At menus,  clicking either  button by  itself and releasing it is
          the same as pressing ENTER on the keyboard.

          When in the file window, the buttons are put to some use:

               -    Clicking  and   releasing  the   LEFT  button   is
                    equivalent to PgUp (Previous screenful)
               -    Clicking  and   releasing  the   RIGHT  button  is
                    equivalent to PgDn (Next screenful)

          The primary  reason for  supporting the  mouse is  not for making
          menu selections,  (although it can be used for that), but instead
          for moving the cursor about in the File Window.



          Installation


          FX does  not require a formal installation as such- the only file
          required to run FX is, simply enough,  "FX.exe".  To "install" FX
          is to  COPY the  file "FX.exe"  to any desired location.  On hard
          disk systems,  it would  certainly be  recommended that this be a
          directory that  is on  the "search  path", (any directory that is
          named in  the PATH  environment variable), so the system can find
          FX regardless of the current working directory.



          Invoking FX


          New in  version 1.1  is full support for command line parameters;
          nearly every  aspect of  FX can now be configured in this way.  A
          listing of  these options  is available  at any  time  by  simply
          invoking FX with the "/?" option:

               FX /?

          FX will  list the  options to  the standard  output (usually  the
          screen unless redirection (>) is used), and stop.

          The "full dress" form of FX version 1.1 is therefore:

               FX  filename  /A  /H  /J  /M  /N  /Q  /R  /S  /T  /?

          These options  may be typed in any order, in upper or lower case,
          and must  be separated by spaces.  Each one is optional, and they
          can be  mixed and  matched to suit the need at hand, or specified
          in  batch   files  to   invoke   FX   with   special   often-used
          configurations.





          _________________________________________________________________
          (C) 1990, William Noble                                    Page 4


          FX User Documentation                                 Version 1.1
          _________________________________________________________________



               <filename>     The  name  of  the  file  that  FX  will
                              automatically load  upon starting.  This
                              may  be  any  legal  DOS  filename,  and
                              should include  a drive  and/or path  if
                              the file  is not  in the current working
                              directory.  If no filename is present on
                              the command  line, or  FX cannot  locate
                              the  file   specified,  then   the  file
                              selection box  will automatically pop up
                              as usual.

               /A             Start in Pure Alphanumeric display mode.

               /Annn          Specify numeric ASCII value <nnn> of the
                              character to  use when  in Alpha-Numeric
                              display mode.   By  default, FX  uses  a
                              small dot, ASCII 250.  Any character may
                              be used from the IBM character set, from
                              0-254.  For example, "/A95" or "/A240".

               /H             Cause  FX   to  start  with  hexadecimal
                              status line notation enabled.

               /Jnnn  ***     Jump automatically  to byte  <nnn>.   (A
                              file must  be supplied  on  the  command
                              line  for   this  option   to  have  any
                              effect).  The value must be in the range
                              0 -  (file size  -1).   Note that if the
                              "/S" switch  is used to set the starting
                              display byte  ("StartByte"),  then  this
                              value becomes  the lower  bound for  the
                              Jump value.   If  the value  is  out  of
                              range, FX  will position  the cursor  at
                              byte 0.

               /Mn            Default  starting   file  display  mode,
                              where <n> is a number 1-7.

               /Nchar         Starting numeric  display mode.   One of
                              four characters  (upper or  lower  case)
                              must immediately follow the "/N": (N)one
                              (B)inary (D)ecimal or (H)exadecimal.

               /Q             Skip the  signon  screen  (Quiet).    By
                              default,  FX  will  display  an  initial
                              title  screen   containing  a  copyright
                              notice and  shareware information.  This
                              screen can  be skipped  by adding a "/Q"
                              to the command line.






          _________________________________________________________________
          (C) 1990, William Noble                                    Page 5


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


               /Rnnn          Set  default  starting  record  size  to
                              <nnn> bytes.   This value must be in the
                              range 1-3610  decimal in this version of
                              FX.

               /Snnn  ***     Set starting byte to <nnn>.  This switch
                              sets the "StartByte" value, but like the
                              "/J" switch,  a file must be supplied on
                              the command line for this option to have
                              any effect.  It must be in the range 0 -
                              (file size in bytes - 1).

               /Tnnn          Set the tab amount, 1-65000 decimal.

               /?             Display list of command line options


          The starred  (***) items  /J and  /S are  ONLY meaningful  when a
          filename is present.

          Notes:

               -    Either a  foreword slash (/) or minus sign (-) may
                    be used as the switch character.

               -    Numeric arguments  must immediately  follow the 2-
                    character switch, and are assumed to be in decimal
                    (base 10)  notation.   If it is preferred to enter
                    any value  in hexadecimal notation, an "H" must be
                    appended to  the number, forcing FX to evaluate it
                    as a  hexadecimal quantity.   For example, "/TffH"
                    or "/JFEh".
























          _________________________________________________________________
          (C) 1990, William Noble                                    Page 6


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Some examples of invoking FX with command line options are:

               FX /q

                    Run FX, skip initial screen.

               FX A:x.dat /q /NB

                    Run FX,  skip initial screen, and examine the file
                    "A:x.dat".     Binary  numeric   display  mode  is
                    requested as well (/NB).

               FX c:myfile /T25 /A /A0 /M7 /S150 /J300 /TffH

                    This command  tells FX to start automatically with
                    the  file   "C:MYFILE"  in   the  display  window,
                    specifies  that   alphanumeric  display   mode  be
                    toggled on  (/A), sets  the  alphanumeric  display
                    character to  ASCII 0  (/A0), starts  FX  in  file
                    display mode  number 7  (/M7), sets  the  starting
                    file byte   (StartByte) to 150 (/S150), places the
                    cursor initially at byte 300 (/J300), and sets the
                    tab amount to FF hexadecimal (/TffH).

































          _________________________________________________________________
          (C) 1990, William Noble                                    Page 7


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Using Menus and Input Areas


          To use  any menu in FX, either press the first letter of the menu
          item, or  highlight  the  desired  item  using  the  Arrow  keys,
          Spacebar or Backspace keys and press ENTER.

          When entering  values in  input areas, the following editing keys
          may be used:

               -    LEFT/RIGHT ARROW  KEYS may be used to position the
                    cursor anywhere in an input area.

               -    HOME/END will move the cursor to the first or last
                    position in the area, respectively.

               -    INSERT:   Toggles between insert mode and overtype
                    mode.   FX starts  in overtype mode, meaning typed
                    characters will  replace existing ones.  In INSERT
                    mode, a  block  cursor  is  displayed,  and  typed
                    characters   are   inserted,   shifting   existing
                    characters to the right.

               -    DELETE:   Deletes  the  character  at  the  cursor
                    position, and  shifts all  characters to the right
                    of the cursor left one position.

               -    BACKSPACE:   Deletes the  character to the left of
                    the cursor,  shifting the  remainder of  the  area
                    left one position.

               -    ESCAPE:  Cancel current entry and back up.



          Using the Numeric Entry Box


          A special  entry box  appears when one of the 4 options Startbyte
          ("S"), Recsize  ("R"), Tab Amount ("T") or Jump ("J") is invoked.
          These are the only FX commands that require a numeric value to be
          entered by  the user.   Two  entry areas  are provided:  one  for
          decimal notation,  the  other  for  hexadecimal  notation.    The
          desired value  can be  entered in  EITHER box, depending on one's
          inclination.   One can  switch between  the 2 formats by pressing
          TAB, Shift-TAB or using the Up/Down arrow keys.   To the right of
          each input  area is  shown the  range  of  valid  values  between
          parenthesis.

          Type in  the  new  value  (in  decimal  or  hexadecimal  notation
          depending on  the selected entry area) and press ENTER to confirm
          the new  value, or  ESCAPE to  leave the  initial  default  value
          unchanged.



          _________________________________________________________________
          (C) 1990, William Noble                                    Page 8


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Since it  is often  necessary to  do some math to calculate these
          values, (and often in hexadecimal, no less!), a simple calculator
          capability has  been provided.  If the number entered is PRECEDED
          by a  plus ("+"),  minus ("-"),  multiply ("*")  or divide  ("/")
          character, then  that operation is performed as if one were using
          a 4-function calculator.  That is, FX will use the value that was
          LAST in  the box,  and perform  the calculation  requested by the
          symbol "+",  "-", "*"  or "/",  in the same way that a calculator
          would:

               New value = <Last Value> (+-*/) <Value just entered>

          For example,  assume one wishes to modify the default record size
          by pressing  "R".   The entry  box will  pop up,  and the default
          values will look something like this:

               [    72]  (Dec 1-3610)
               [    48]  (Hex 1-E1A)

          If one  wanted to increase the default of 72 by 9, one would just
          type a  plus sign  ("+") followed by the number we want to add to
          72, 9 in this case:

               [+9    ]  (Dec 1-3610)
               [    48]  (Hex 1-E1A)

          Then press ENTER.  Since FX sees the plus sign, it will calculate
          this addition  and place  the answer  back into  the decimal  and
          hexadecimal areas.  The display will now look like this:

               [    81]  (Dec 1-3610)
               [    51]  (Hex 1-E1A)

          Any amount  of calculating may be done in this fashion.  Pressing
          ENTER will accept the number displayed as the new value.

          In summary:

               [TAB] or
               Up/Down Arrow  Toggle between  decimal and  hexadecimal
                              entry format.

               ENTER          Accept value  currently displayed.    If
                              one of  the 4  operators (+-*/) precedes
                              the  number,  then  the  calculation  is
                              performed and  the  answer  placed  back
                              into the input areas in both decimal and
                              hexadecimal notation.  Press ENTER again
                              to  accept   this  value,   or  edit  it
                              further.

               ESCAPE         Leave   the    initial   default   value
                              unchanged and return to the file window.



          _________________________________________________________________
          (C) 1990, William Noble                                    Page 9


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Basic Concepts


          A file  is nothing  more than  a stream  of continuous bytes.  FX
          displays these bytes exactly as they occur in the source file, in
          the same order they occur.  The power of FX, however, lies in its
          ability to  format and  display this information in a meaningful,
          flexible manner, and do it very fast.  Files are displayed in the
          FX "File  Window", which  is always  visible and consumes most of
          the screen display.

          FX formats  files by  breaking them  up into  "RECORDS" of  fixed
          length, displaying  one record  per display  line.   Therefore, a
          "Record" in  the context  of FX  is "The  number  of  file  bytes
          formatted per  line in  the FX File Window".  (In certain display
          modes, each  record may  take up as many as 3 rows on the screen;
          therefore, this  "line" may  actually  be  composed  of  2  or  3
          physical rows  in the  File Window).   The  record  size  can  be
          modified by the user to be anything from 1 byte up to about 3,600
          bytes.   Please keep  in mind  that the  physical file is still a
          continuous stream  of bytes, and that FX is only VIEWING the file
          as a series of "records" to unencumber its display.

          FX starts  up with a default record size of 72 bytes.  This is by
          no means  a magic number-- it happens to be the number of columns
          in the  display window.   In  some cases,  such as  fixed record-
          length database files, it is meaningful to view the file in terms
          of a  very specific  record size, in which case FX can be made to
          display one  database record  per line.   In other cases, such as
          executable files  like "FX.exe", there is no underlying structure
          to the file, and the idea of a record size isn't relevant.

          While running  FX, the  record size may be repeatedly changed; FX
          will automatically  reformat the file display in the File Window.
          (This is,  by the way, a good technique for uncovering underlying
          patterns in files).

          FX also has the unique ability to instantly change its display of
          file bytes:  ASCII, DECIMAL or HEXADECIMAL, or any combination of
          those three,  which amounts  to 7 possible display formats.  This
          is covered in detail later in the documentation.















          _________________________________________________________________
          (C) 1990, William Noble                                   Page 10


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Using FX- Overview


          FX uses  just  one  main  screen,  on  which  is  maintained  all
          information about the file being examined, and which is dominated
          by the "File Window".  This window is the "command center" of FX;
          it is  from here  that one  examines files  and  invokes  all  FX
          commands.


          Moving through the File

               The keys used to move around in the file window are:

               Left Arrow     Move left to the previous byte
               Right Arrow    Move right to the next byte
               Up Arrow       Move up to the previous record
               Down Arrow     Move down to the next record
               Enter          Move to first byte of next record
               Shift+Enter    Move to first byte of previous record
               Alt <-         Jump to the first byte in the record
               Alt ->         Jump to the last  byte in the record
               PgUp           Previous screenful
               PgDn           Next screenful
               Home           Jump to  first byte  in the  file window
                              (left edge of screen)
               End            Jump to  last byte  in the  file  window
                              (right edge of screen)
               Ctrl-PgUp      Jump to the first record in the file
               Ctrl-PgDn      Jump to the last record in the file
               Ctrl-Home      Jump to first file byte (StartByte)
               Ctrl-End       Jump to last byte in the file
               F9             Pan left by 1/2 window
               F10            Pan right by 1/2 window
               Tab            Move forward by tab amount
               Shift+Tab      Move backward by tab amount

               (A beep  will sound  if an  attempt is made to move past the
               file boundaries).

















          _________________________________________________________________
          (C) 1990, William Noble                                   Page 11


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Selecting Display Modes

               The function  keys F1  through F8,  shift F1 through F8, and
               the "H"  key, are  used to modify aspects of the FX display.
               Function keys  F1 through F7 each correspond to one of the 7
               file display modes offered by FX.  Function key 8 is used to
               select the so-called "Numeric Display", which gives detailed
               information on  numeric values  that exist  at  the  current
               position in  the file.  The "H" key is used to toggle on/off
               hexadecimal notation for the 2 status lines at the bottom of
               the screen.  These options are covered in detail later on.

               F1 - F7        Select a Display Mode 1 through 7.

               SHIFT + F1-F7  Same as  above, but  also  automatically
                              adjusts the  number of  bytes per record
                              for the given mode.

               F8             Cycles through  the  4  Numeric  Display
                              options:  Decimal,  Hexadecimal,  Binary
                              and None.

               H              Causes  FX  to  toggle  its  hexadecimal
                              status line  display on  and off.    (By
                              default,  FX  displays  the  file  size,
                              position in the file, etc., in decimal).
                              Toggling this option ON will ALSO affect
                              display  mode   number  1,  causing  the
                              record offsets  displayed to the left of
                              the File  Window to  ALSO be  toggled to
                              hexadecimal notation.

























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          Synopsis of FX Commands

               An alphabetic summary of the FX commands follows.  To invoke
               a command,  type either  the  upper-  or  lower-case  letter
               indicated between  quotes, or  select the  command from  the
               Options menu:

               "A"lpha Mode   Toggle PURE  ALPHA MODE.  FX starts with
                              this mode  OFF.   When toggled  ON,  all
                              non-alphanumeric     characters      are
                              displayed as a small dot.
               "C"ount        Count occurrences  of byte  patterns  in
                              the file.
               "D"atabase     Optimize  the   FX  display  to  isolate
                              sections of dBASE database files.
               "F"ile         Select file  to examine.   A list of all
                              files in  the current  directory will be
                              "popped up"-  just highlight the desired
                              file and press ENTER.
               "H"ex          Toggle  on/off  hexadecimal  display  of
                              values  on  the  status  lines  and  the
                              record offsets when in display mode 1.
               "J"ump         Jump directly to any byte in the file.
               "L"ocate       Locate byte or text patterns
               "N"ext         Jump to next occurrence
               "R"ecSize      Specify the  record size, in bytes; that
                              is, the  number of  bytes that  FX  will
                              place on each display line.
               "S"tartByte    The  byte  in  the  file  to  begin  the
                              display with.   FX will ignore all bytes
                              before the  StartByte, thus establishing
                              a "new"  beginning of  file.    This  is
                              purely for ease of VIEWING the file, and
                              has NO effect on the actual file!
               ALT-S          Sets the  StartByte at  the current file
                              position.
               "T"abAmount    Specify the number of bytes that will be
                              skipped ahead  or backward  when TAB  or
                              SHIFT-TAB are pressed.
               e"X"it or      Quit FX
               ESCAPE

               CONTROL+ENTER  Modify current byte.
               Alt-H          Call up the Help screen.
               Alt-D          DOS Shell
               /              Invoke the FX Options Menu.


               Pressing either  the ESCAPE  key or the letter "X" will quit
               FX.   If a file has been selected, then a prompt will pop up
               to confirm  that the  user wishes  to continue  and exit the
               program.



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               The Options  Menu.  To assist in understanding and using the
               various FX  commands, the FX Options Menu is provided.  This
               menu is  invoked by  typing the  forward slash  (/).    This
               feature has  been added  as a convenience, enabling not only
               the selection  of an  FX option,  but also  providing  basic
               information on  each one.   As the highlight bar is moved up
               and down  (via the  Arrow Keys,  Spacebar or  Backspace),  a
               description of  each item  is continuously  displayed to the
               right.   Options are invoked from this menu the same as from
               the File  Window:  by  pressing  the  upper-  or  lower-case
               letter, or  the desired  function key.   Also, the currently
               highlighted option  can be  invoked by  just pressing ENTER.
               To exit  this menu  and invoke no option, just press ESCAPE,
               as usual.










































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          The Major FX Functions


          Selecting a File To Examine  ("F")

               All FX  sessions begin  by selecting a file from the FX file
               selection box,  unless a  file was  supplied on  the command
               line when FX was started.

               FX begins  in the  current working  directory on the current
               drive.   The file  box will contain every file (*.*) in this
               directory, as well as a parent directory, if applicable, and
               any subdirectories.   This  box provides  the full  means to
               navigate throughout  the entire directory structure, as well
               as, of  course, selecting  files to  examine.   If a file is
               chosen from  another directory,  then that directory becomes
               the new default FX path for subsequent file selections.

               Moving the  Highlight:  Press  Up/Down  arrow  to  move  the
               highlight one  file at  a time,  or  PgUp/PgDn  to  move  by
               screenfuls.   Press HOME  to jump to the first file, and END
               to jump to the last.

               SPEED Selection:  By pressing the first letter of a filename
               (upper or  lower case), FX will jump to the next file in the
               list that  begins with that letter.  Also, one can press the
               open parenthesis  "(" to  jump to  directory entries,  which
               always begin with this character.

               Sorting the  List: The  list  of  files  can  be  sorted  by
               extension (ALT-X),  by name  (ALT-N) or  by size  (ALT-S) to
               make finding a file easier.  (This sort order will remain in
               effect for subsequent file selections).

               To select  a file  to examine,  simply highlight the desired
               file  and  press  ENTER.    Press  ESCAPE  to  exit  without
               selecting a file.

               The FX  file selection  box  also  allows  one  to  navigate
               throughout the  current drive  by moving  up  and  down  the
               directory tree.  The Parent Directory and Subdirectories are
               enclosed in  parentheses ()  to distinguish  them  from  the
               other files  in the  list.  If you are currently in the root
               directory, then  of  course  no  Parent  directory  will  be
               listed.

               To select  the PARENT  directory: Highlight  the file called
               "(..) Parent"  and press  ENTER.   The parent  directory  is
               selected, and  a new  list of  files for that directory will
               appear.






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               To select  a SUBDIRECTORY:  Highlight and  subdirectory  and
               press ENTER.   A  new list  of files for that directory will
               appear.

               To select  another drive,  press F2.   FX  determines  which
               drives are  configured in  the system  and displays  a menu.
               Select the desired drive.

               Note: FX  does not  change the  current working directory or
               drive.   When FX  is exited,  the system will be at the same
               drive and directory as when FX was started.


          Locating Byte Patterns  ("L")

               After invoking  Locate, an  input area pops up on the top of
               the screen.   Please observe that FX can search for ANY byte
               value possible in MS-DOS files, INCLUDING ASCII 0.  For this
               reason, not  only does FX need to know which bytes to search
               for, but  also the  NUMBER of  bytes that compose the search
               string.   A moveable  vertical "bar"  exists in  the  locate
               window for  this purpose  that can be shifted right or left,
               and all bytes TO THE LEFT of the bar form the search string;
               all bytes  to the  right  of  the  bar  are  ignored.    The
               following keys are used here:

               -    CURSOR UP  or CURSOR  DOWN: Move cursor to desired
                    input line (ASCII/DEC/HEX).

               -    CURSOR RIGHT,  ENTER, or  TAB:  Move right to next
                    byte.

               -    CURSOR LEFT,  SHIFT+TAB or  SHIFT+ENTER: Move left
                    to previous byte.

               -    CONTROL-RIGHT ARROW:  Move the "bar" right.

               -    CONTROL-LEFT ARROW:  Move the "bar" left.

               -    CONTROL+ENTER or F10: Begin the search.

               -    ESCAPE: Return to the File window.


               The data  may be entered in any of 3 formats: ASCII, Decimal
               or Hexadecimal,  depending on one's inclination.  A line for
               each format  is provided  in the  locate window.   The first
               line is  for ASCII, the second for hexadecimal, and the last
               for decimal.   Independent of the format chosen to enter the
               data,  the   values  in   the  other   2  lines  are  ALWAYS
               continuously updated  by FX  to reflect  that value in those
               other 2  formats.   In addition,  the bytes  may  be  freely
               defined in any mix of formats.



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               For instance,  say it  is desired  to locate  the codes in a
               printer-driver file that cause an EPSON MX printer to change
               to bold: "ESCAPE E".

               The "ESCAPE"  character could be entered in decimal by first
               pressing down  arrow twice  to get  to the  decimal line and
               typing  27.     Note   the  values  in  the  2  lines  above
               automatically reflect  this: the first line will contain the
               ESCAPE graphic, and the hexadecimal line will contain 1B.

               Next, one could move to the first line (ASCII) and enter the
               second byte, the capital letter "E".  Again note the 2 lower
               lines reflect  this value.   (The  letter E  could  also  be
               entered in its decimal ASCII value, 69, or hexadecimal ASCII
               value, 45H).

               Next, one  tells FX  how many  bytes to search for.  In this
               example, we  are looking  for ESCAPE-E,  just 2  bytes.   So
               press CONTROL-RIGHT  ARROW once to move the bar to the right
               1 byte.   All  bytes to  the left  of the  bar will form the
               search string, in this case 2.

               (If it were decided to search for just the ESCAPE character,
               one would  press CONTROL-LEFT  ARROW once to move the bar to
               the left  one byte.   Now, just the ESCAPE character will be
               searched for.  Note that there is NO NEED to fiddle with any
               bytes to the right of the bar: FX ignores them completely).

               IMPORTANT NOTE:  FX  begins  searching  the  file  from  the
               "StartByte" value.   This  always defaults  to 0  when a new
               file is selected, meaning the display of the file will begin
               at its  physical beginning.  If this value has been modified
               by the  user, then  any occurrences  in the file before this
               location won't  be found.   To  search the ENTIRE file, just
               re-set the StartByte to 0 before invoking Locate.

               To begin  the search,  hit F10.   FX asks whether the search
               should be  case-sensitive;  that  is,  whether  or  not  the
               alphabetic characters    A-Z  and  a-z  should  be  compared
               without regard  to case.  If "Ignore Case" is selected, then
               FX considers an "A" to be equal to an "a", and so forth.  In
               this  example,   "Exact  Match"  would  be  the  appropriate
               selection, since ESCAPE-e is not a valid EPSON MX code.

               FX then  asks whether to start the search from the beginning
               of the  file, (that  is, from the "StartByte" value), or the
               current file position- select the desired option.

               As usual,  ESCAPE may  be pressed at any point to cancel the
               LOCATE.   Also, ESCAPE  may be  pressed during the LOCATE to
               cancel and resume FX in the File window.





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          Counting Byte Patterns  ("C")

               The Count  function is  quite similar  to LOCATE.   The only
               difference is  that Count  does not  provide the  option  of
               counting from the current file position- count ALWAYS begins
               at the StartByte.

               IMPORTANT NOTE:  FX counts  occurrences  STARTING  FROM  THE
               StartByte   VALUE.   If StartByte  is larger than 0, then FX
               will not start counting from the physical start of the file,
               but from  the offset  into the  file specified by StartByte.
               To receive  an accurate  count of  occurrences in the ENTIRE
               file, re-set the StartByte to 0 if it has been changed.


          Modifying a File Byte (Control-ENTER)

               Any byte in a file may be modified by pressing CONTROL-ENTER
               when positioned  on the  desired byte.   (Press and hold the
               CONTROL key and type ENTER).  As with the LOCATE command, an
               input area  appears at  the top  of the screen, allowing the
               new value  for the  byte to  be entered in any of 3 formats:
               ASCII, Decimal  or Hexadecimal.  Just position the cursor to
               the box  for the  desired format  by pressing UP ARROW, DOWN
               ARROW or TAB, then enter the value.  The values in the other
               2 boxes  will be updated and display this value in the other
               two formats.   To  commit the  change, press  either F10  or
               CONTROL-ENTER.  To abort, press ESCAPE.

               To ensure  that the change took place as expected, FX writes
               out the  changed byte  and flushes the file buffer, then RE-
               LOADS and re-displays the current window.  This takes almost
               no time, and verifies the modification beyond question.

               Please keep in mind that this is the ONLY means by which any
               byte can  be changed in the file.  No other sequence of keys
               or actions  will modify  a file  byte  other  than  pressing
               CONTROL-ENTER and confirming with F10 or CONTROL-ENTER.


          Jumping Directly to Any Byte  ("J")

               One may  jump directly  to any  byte position in the file by
               using the  JUMP option.   Note  that if the starting display
               byte ("StartByte") has been modified, then that value is the
               lower bound for the jump.

               (See the  section "Using  the numeric  entry box"  near  the
               beginning of  the documentation for full details on entering
               numbers).






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          DOS Shell  (Alt-D)

               FX now  provides a  DOS  shell  option,  enabling  users  to
               quickly exit  to DOS  and run other programs or DOS commands
               without ending  the current FX session or losing the current
               configuration.   Press Alt-D to activate this feature.  When
               ready to  return to  FX, type  "EXIT" from  the DOS  command
               line.


               Notes:

                    -    The file  "COMMAND.COM" must be available for
                         this function to work.  Make sure the COMSPEC
                         environment  variable   correctly   specifies
                         where  to   find  "COMMAND.COM".     This  is
                         typically  established  in  the  AUTOEXEC.bat
                         file,  which   contains  a   line  like  "SET
                         COMSPEC=<full pathname of COMMAND.COM>.

                    -    Do NOT  modify or  delete the  file currently
                         being examined!   FX  leaves this  file  OPEN
                         during  the  DOS  Shell,  and  upon  re-entry
                         checks for  its existence.   If  it cannot be
                         found, then  FX will  stop at once and return
                         to DOS.   If  ANY work  is done  on this file
                         while in  the DOS Shell, then the results may
                         be unpredictable!

                    -    This command IS NOT a substitute for quitting
                         FX!   After invoking  the DOS  Shell  option,
                         always type  "EXIT" to return to FX, then hit
                         "ESCAPE" or  "X" to  quit FX  in  the  normal
                         fashion.

                    -    If an  error message  is received when trying
                         to invoke  the DOS Shell, please refer to the
                         section "Summary  of FX  Messages" at the end
                         of the documentation.

















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          Major Display Formatting Options


          Changing the Display Mode  (F1-F7) and "A"

               One of  the most  powerful features  of FX is its ability to
               display a  file in any of 7 different formats.  In addition,
               any format  may be  toggled to  "Pure Alpha" by pressing the
               letter "A",  making it  much easier  to look  for text  in a
               binary file.   In  "Pure Alpha"  mode, only  standard alpha-
               numeric  characters  are  displayed;  all  other  characters
               (high-bit graphics  with ASCII values above 127 and graphics
               from ASCII  1-31) are  displayed as  a small  dot.  However,
               since the  display does  not accurately reflect the bytes in
               the file,  bytes cannot  be modified  in  pure  alpha  mode.
               (When this  mode is  enabled, the  text "[PURE ALPHA-NUMERIC
               DISPLAY MODE]"  will appear  on the lower-left corner of the
               File window box).

               The best  way to  become acquainted with each display format
               is to try out all 7 while running FX.  These formats account
               for every  combination of  ASCII, Hexadecimal,  and  Decimal
               notation, and are summarized as follows:

               Format 1       ASCII, one row displayed per record.

               Format 2       Hexadecimal,  one   row  displayed   per
                              record.

               Format 3       Decimal, one row displayed per record.

               Format 4       ASCII  on   first  row,  hexadecimal  on
                              second row.

               Format 5       ASCII on  first row,  decimal on  second
                              row.

               Format 6       Hexadecimal on  first  row,  decimal  on
                              second row.

               Format 7       ASCII  on   first  row,  hexadecimal  on
                              second row, and decimal on third row.

               Bear in  mind that  in modes  4, 5,  6 and 7, the file bytes
               that are  normally displayed  on one  row in the first three
               modes will now require TWO or THREE rows on the screen.  For
               example, in  mode 6 (Function key 6 was pressed) each record
               from the  file will  occupy TWO rows in the File Window: The
               first will reflect the data in hexadecimal notation, and the
               second will  display the  same data  in decimal  form.   The
               cursor block  will be  3 columns  wide, and  2 rows  high in
               order to  contain the  2 display lines.  Although the cursor
               is larger, it is STILL only reflecting ONE byte in the file!



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               The cursor  size ("Cell"  size)  will  automatically  adjust
               depending on  the display  mode, since the cell must be able
               to hold  the largest  value that  can occur  in the  current
               mode.   For instance,  in DECIMAL  mode (mode  3), the "Cell
               Size" is  one row high and 3 columns wide, since three-digit
               numbers can  occur.  Remember that no matter which format is
               selected, the  cell is still just reflecting ONE byte in the
               file.

               As  mentioned  before,  the  display  mode  is  selected  by
               pressing F1  through F7 or SHIFT F1-F7.  The characteristics
               of each mode are summarized as follows:

               Key  Display Mode                  Cell Size
               ---  ---------------------------   ------------------
               F1   FORMAT 1- ASCII               1 row  x 1 column
               F2   FORMAT 2- HEX                 1 row  x 2 columns
               F3   FORMAT 3- DEC                 1 row  x 3 columns
               F4   FORMAT 4- ASCII + HEX         2 rows x 2 columns
               F5   FORMAT 5- ASCII + DEC         2 rows x 3 columns
               F6   FORMAT 6- HEX   + DEC         2 rows x 3 columns
               F7   FORMAT 7- ASCII + HEX + DEC   3 rows x 3 columns

               Note that the display mode may be freely changed as often as
               desired- FX will always maintain the cursor at the same file
               byte.

               If SHIFT  is pressed  along with  any of  the above function
               keys (F1-F7),  the display  mode is  not  only  selected  as
               above, but  FX will  also automatically increase or decrease
               the record  size (RecSize)  value so  that  each  line  fits
               exactly in  the display window.  For example, if one pressed
               F7 to switch to format seven from format one, only one-third
               as many  bytes would  be visible  at a  time-  the remainder
               being off  to the  right or  left of  the window.   Pressing
               SHIFT-F7, however,  would reduce  the record  size, (# bytes
               per line), by one-third as well to 24 bytes per record.

               Note on  multi-row  modes  (Format  4  -  Format  7):  On  a
               monochrome monitor,  the last  row of  each record  will  be
               underlined.   On a  color monitor,  the  last  row  will  be
               displayed in a contrasting color.














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          Selecting the Numeric Display (F8)

               The value  of the  Byte, Integer,  and Long-Integer  at  the
               current file  position is  continuously displayed at the top
               center of the screen.  Each press of F8 cycles through the 4
               display options:

                    1)   DECIMAL notation (default)
                    2)   HEXADECIMAL notation
                    3)   BINARY notation
                    4)   No Display: Center top of screen left blank.

               A BYTE  is one  character (byte)  in length and is the basic
               building block  of MS-DOS files.  Each byte is composed of 8
               "bits", each  having one  of two possible values: 1, meaning
               that bit is "set", or 0, meaning that bit is "cleared".  The
               bits in a byte are numbered from 0-7.  Bit 0 is known as the
               "least significant"  bit position,  and has  a weight  of 1.
               Bit 7  is the  "most significant" position, with a weight of
               128.   This is  analogous to  the base  10 numbering system,
               where the  right-most position has a weight of 1, the one to
               its left a weight of 10, then 100, 1000, and so on.

               An INTEGER  is 2  bytes, and  a LONG  INTEGER  4  bytes,  in
               length.   (Integers and  Long Integers  are also referred to
               "Words"  and   "Double  Words",   respectively).     As   an
               illustration, assume  a dBASE database file is being viewed:
               The record  count is stored in the file as a 4-byte unsigned
               long; instead  of having  to manually  figure out what the 4
               bytes in  the file  add up  to,  it  is  only  necessary  to
               position the  cursor to  the correct byte in the header area
               of the  database file,  then check the top of the screen and
               note the value shown for the "Unsigned Long".  (Please refer
               to the  detailed discussion  of dBASE  database files at the
               end of this documentation).

               To summarize,  FX derives  the values  for the Byte, Integer
               and Long Integer as follows:

               BYTE:          The value  of the  single  byte  at  the
                              current file (cursor) position.

               INTEGER:       The integer  value of  the pair of bytes
                              at the  current file position; the first
                              byte being  the one  at the  cursor, and
                              the second byte the one after that.

               LONG:          The LONG (4 byte) integer at the current
                              file position,  the first byte being the
                              byte under  at cursor,  followed by  the
                              next 3.





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               For reference,  the signed  and unsigned  decimal ranges  of
               these values are as follows:

                       UNSIGNED                    SIGNED
                       Min  Max             Min              Max
                       ---  -------------   ---------------  --------------
               BYTE     0   +255             -128            +127
               INTEGER  0   +65,535          -32,768         +32,767
               LONG     0   +4,294,967,295   -2,147,483,648  +2,147,483,647


               For example,  given the  same sample  file position, each of
               these displays would appear as follows as F8 was pressed:


               Decimal:         U Byte:13           S Byte:13
                                U Int :48653        S Int :-16883
                                U Long:2298789389   S Long:-1996177907

               Hexadecimal:     H   Byte:0dH
                                E   Int :be0dH
                                X   Long:8904be0dH

               Binary:          B   MSB--7654321076543210--LSB
                                I   Byte:        00001101
                                N   Int :1011111000001101

               If DECIMAL  display is selected, two columns of numbers will
               be shown:  the left  column is  the UNSIGNED  value  of  the
               number at  the current cursor position, and the right column
               is the  SIGNED value.  An unsigned number cannot be negative
               by definition,  and all  8 bits in each byte are numerically
               significant.   A signed  number, on  the other  hand, CAN be
               negative, because  the high-order  bit is  NOT used  for its
               value but  as the  "sign bit":  if the  sign bit  is 0,  the
               number is  positive, and  if it is 1 the number is negative.
               (Negative signed  numbers are  represented  in  their  two's
               compliment form.  The binary form of a negative number-- its
               two's compliment--  is found  by taking  the positive  form,
               reversing each bit, then adding 1.  More won't be said about
               this, except  that FX  does this  conversion automatically).
               Please understand  that the  issue of signed versus unsigned
               numbers is  only  one  of  INTERPRETATION-  a  byte  is  not
               intrinsically signed  or unsigned,  but only becomes so when
               one decides  to use  the high-order bit as a flag instead of
               for its binary value.

               If HEX  display is  selected, there  is only one column: The
               unsigned Hexadecimal  (base 16)  value of the byte, integer,
               and long integer at the current file position.






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               The BINARY  display shows only the byte and integer- not the
               long integer.   The "Least Significant Bit" position, (LSB),
               is at the right of the value, and the "Most Significant Bit"
               position (MSB)  is to  the left.  This means that the right-
               most bit  has a weight of 1, then progresses to 2, 4, 8, 16,
               32, etc.,  moving from  right to  left.   Above the byte and
               integer values is displayed the bit positions, numbered from
               0 to  7.   (Binary display  reflects the unsigned value, NOT
               the two's compliment).



          Toggling Hexadecimal Status Line Notation ("H")

               Since it is often necessary to work both in terms of decimal
               and hexadecimal  notation, FX  is able  to toggle its status
               line display between these two representations.  Since it is
               assumed that  pressing "H"  indicates  a  desire  to  "think
               hexadecimal", this  will ALSO  cause hexadecimal notation to
               be used  for the  column of  record offsets displayed to the
               left of  the file display for Display Mode number 1 (ASCII).
               Only mode #1 is affected, since the other six modes will use
               decimal  or  hexadecimal  implicitly.    In  addition,  file
               positions reported  by the  LOCATE/COUNT/NEXT functions  are
               affected by this toggle.

               When hexadecimal  notation is  toggled ON,  the message "Hex
               Notation" will  appear  on  the  bottom  right  of  the  box
               enclosing the file display.


          Optimizing the Display for ".DBF" Files  ("D")

               Since it  is often necessary to investigate dBASE compatible
               database files,  FX has  a feature  that  facilitates  their
               display in  the FX File Window.  Pressing "D" invokes a menu
               with 3 options: DATA, FIELDS and NORMAL.

               If one selects "DATA", FX will automatically determine where
               in the  database the  actual data  (records) begin, and also
               the record  size.    FX  will  then  automatically  set  the
               StartByte and the RecSize to these values.  Further, the TAB
               amount is set to equal the record size, so each press of TAB
               advances one record.

               If one  selects "FIELDS",  FX will  optimize its  display to
               show the  database field definitions from the header area of
               the database.  This is the same for all databases: the field
               definitions begin  at byte  32, each definition requiring 32
               bytes.     Again,  the   StartByte,  RecSize   and  TAB  are
               automatically set by FX.





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               The NORMAL option does nothing more than set StartByte to 0,
               RecSize to  72 (the width of the display window), and TAB to
               5.

               Since  FX  might  potentially  be  used  to  repair  damaged
               database files,  it will  allow  the  above  options  to  be
               invoked even though the first byte in the file is other than
               decimal  2,  3  or  131  for  dBASE  III  databases.    (See
               discussion on  databases  later  on).    It  will,  however,
               display a  warning message.   Also, if the values found from
               the file don't make sense, (E.g. the header area of the file
               indicated a  record size  that is  larger than  the over-all
               file size!),  FX will display a message and not take further
               action.   Also, FX  doesn't care whether or not the file has
               the ".DBF" extension.

               Please refer  to the discussion of database files at the end
               of this  manual for  more information  about  database  file
               structures.





































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          FX User Documentation                                 Version 1.1
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          Understanding The FX Display


          FX displays files in terms of lines (records) in the File Window,
          each containing the number of bytes as defined for the  "RECSIZE"
          value.   (The last  line of a file may contain fewer bytes if the
          record size is not evenly divisible into the file size).

          FX supports  horizontally scrolling,  if necessary,  and an arrow
          will appear  on the left or right of the top line of the edit box
          to indicate  that data exists outside the display area.  Each row
          in the  window is accompanied by a number to its left outside the
          box border,  which is  the byte  in the  file at  which the  line
          (record) begins.   Note  that these  values will  remain the same
          even if  the data in the window is scrolled to the right or left.
          These numbers on the left will always be displayed in accord with
          the current  display mode  (F1-F7).   For instance, the "F7" mode
          uses  three  screen  rows  per  record:  ASCII,  hexadecimal  and
          decimal.   Therefore, the numbers to the left of each row will be
          expressed in decimal, hexadecimal and decimal respectively.

          At the top-center of the screen is the numeric display, which has
          already been described in detail.

          The last  2 lines  on the  screen display  file  information  and
          various counters  that describe  the current  file position  in a
          number of  ways.  Please familiarize yourself with their meaning!
          For reference, these lines appear as follows when FX is started:

          Byte:    /     Record:   1/0      Recbyte:    # Modified: 0
          File:                    StartByte:0     Recsize:72    Tab:5

          The values  on these  two status lines can be displayed in either
          decimal or  hexadecimal; this  is done  by pressing "H" to toggle
          hexadecimal notation on/off.


          The current  byte is  displayed in a reverse video block ("Cell")
          in the  File Window,  the size  of which changes depending on the
          current display mode.  The number of bytes that fit in the window
          also changes  with the  display mode- for instance, since decimal
          representation requires  3 times  the width  of plain ASCII, one-
          third as  many bytes  will fit  in  the  window,  and  horizontal
          scrolling may be necessary to view the other bytes.












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          StartByte  ("S")

               The Startbyte  is that  byte in  the file  at which  FX will
               begin displaying its contents, and defaults to 0 (first byte
               in file).   This is useful in cases where a file begins with
               a header area that one does not want on the display; one can
               "focus in" on just the data portion that follows it.  Recall
               that if  the StartByte is not 0 (start of file), both LOCATE
               and COUNT will begin at StartByte, not the physical start of
               file.  This value can be modified by pressing "S".

               Also, a  section of  the file might want to be viewed with a
               special record  size, and  setting  the  Startbyte  to  this
               section will  allow FX  to establish its logical records "in
               sync" with the data.

               (See the  section "Using  the Numeric  Entry Box"  near  the
               beginning of  the documentation for full details on entering
               numbers).


          Recsize  ("R")

               The Recsize  (Record Size)  is the number of bytes FX places
               on each  display line.   This  value defaults  to the window
               size, (72  bytes), and  can be  modified  by  pressing  "R".
               Since FX  scrolls horizontally,  the  Recsize  can  be  much
               larger than  the width  of the  display window-- up to about
               3,600 bytes per record.

               The Recsize can be very useful when used in conjunction with
               the StartByte.   For  instance, consider the case of a dBASE
               database file.   The  byte at which data begins can be found
               in the header portion of the database, as well as the record
               size in  bytes.   Armed with this information, the StartByte
               can be set to the byte where data begins, and Recsize can be
               set to  the dbase  record size.    This  will  result  in  a
               "browse" of  the records  in the  database, one  record  per
               line, except that the display is in FX format, so EVERY byte
               in the record is visible!

               (See the  section "Using  the Numeric  Entry Box"  near  the
               beginning of  the documentation for full details on entering
               numbers).












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          Tab Amount  ("T")

               The last  value on  the last  line is the Tab Amount, and is
               the number  of bytes  FX will advance or back up when TAB or
               SHIFT-TAB are pressed.  This value defaults to 5, and can be
               modified by  pressing "T".   Again  referring to  the  above
               database example,  the tab  amount can  be set  to equal the
               database record  size, so each press of TAB will advance one
               record, and each press of SHIFT-TAB will go back one record,
               even if  the FX  record size  differs from  the dBASE record
               size.

               (See the  section "Using  the Numeric  Entry Box"  near  the
               beginning of  the documentation for full details on entering
               numbers).


          File Byte

               The next  to last line is in reverse-video, and displays the
               current position  in the  file from  a number of viewpoints.
               The  first  field,  "Byte:",  ALWAYS  reflects  the  current
               absolute position  in the  file as  an offset  from 0.  Note
               that FX  always considers  the first  byte in any file to be
               byte 0  (zero).   This is  in keeping  with DOS conventions.
               The value  to the  right of the slash ("/") is the file size
               as recorded  by DOS.    Note  that  since  all  files  begin
               numbering at  byte 0,  the last byte in the file will always
               be displayed here as one less than the file size!


          Record

               The number  of bytes  that FX  places on  each line  is  the
               number defined  as the  Record Size  (modified  by  pressing
               "R"), and  defaults to the window size, 72 bytes.  Each line
               (composed of  1-3  physical  rows)  in  the  FX  display  is
               considered to  be  a  record,  and  FX  reckons  records  as
               starting from 1 (one), NOT 0.  Therefore, the record counter
               is much like a line counter in a word processing program.

               Its important to note that records start  numbering FROM THE
               STARTBYTE VALUE.   This means that if the StartByte has been
               set greater than zero, then record numbering will begin with
               1 at that point, and increase from there.

               This counter  is of  use when  viewing database  files,  for
               instance, and  if the STARTBYTE and RECSIZE are set properly
               will exactly  reflect the  database record  number.   Recall
               that the  record size  can be  much larger  than the  window
               dimensions-  up to about 3,600 bytes, in fact.





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          _________________________________________________________________


               If the  record size  specified is  not evenly divisible into
               the number  of bytes in the file, (or, if StartByte is not 0
               then the number of bytes from the StartByte value to the end
               of the  file), the  last line  will show a record number one
               greater than the upper-limit displayed, for example, "Record
               551/550".  This is intentional.


          Recbyte

               This is  the byte  offset into  the current record, with the
               first byte  of a  record being  0.   This is again handy for
               database files and the such, when one knows the byte offsets
               of certain fields within a record.


          Modified

               Displays the  number of  bytes in  the file  that have  been
               changed by  the user.  This counter is reset to 0 whenever a
               new file is selected.



































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          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Using FX with dBASE database files


          This section  is meant  to serve  not only  as a  guide to  dBASE
          database file  structure, but  also as  the basis  for  a  sample
          session.   Also, the  information below  could be  useful in "re-
          constructing" damaged  database files!   So start up FX, load any
          database file, and follow along.  (Needless to say, if you intend
          to alter any bytes in the file, PLEASE DO SO WITH A COPY, AND NOT
          THE ORIGINAL!).

          dBASE databases are composed of 2 main areas:

               (1)  The header  area, which contains information about
                    the database,  such as the number of records, date
                    of last update, and the field definitions.

               (2)  The actual  data immediately  follows  the  header
                    area.   Every record is the same size, independent
                    of how much data is stored in it.


          The bytes  in the  header area  have the following meaning.  (The
          byte numbers  given are from the start of the file; that is, they
          will correspond to the "Byte:" display on the next to last line).

               Byte 0:        dBASE III  version number.  Can have  one  of
                              three values (shown here in decimal): 2=dBASE
                              II file,  3=dBASE III  file, or 131=dBASE III
                              file with  a Memo  field.   (This byte is bit
                              mapped in dBASE IV).

               Byte 1:        Year of last edit date.

               Byte 2:        Month of last edit date.

               Byte 3:        Day of last edit date.

               Bytes 4-7:     Number of  records in  the database.    (Long
                              Integer).

               Bytes 8-9:     Length of the header area in bytes (Integer).
                              Note that  this is  ALSO  the  file  position
                              where the data actually begins in the file!

               Bytes 10-11:   The record size in bytes (Integer).

               Bytes 12-31:   Reserved, and therefore not very interesting.

               Byte 32-??     Fields are  defined.   There will be 32 bytes
                              used to  describe each  field,  for  as  many
                              fields as necessary.




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          _________________________________________________________________


          Examining the field definitions

               To isolate the field definitions:

                    1)   Set StartByte to 32 bytes.
                    2)   Set RecSize to 32 bytes.

               Each line  will contain  a full field definition, the format
               of which follows.  (The values are OFFSETS from the start of
               each field entry).

               Bytes 0-10     The field name, 1-10 characters, zero-filled.
                              (E.g. C-style "Null-terminated" string).
               Byte 11        The field type: C, N, L, D, or M.
               Bytes 12-15    Field data address.  Of no interest to us.
               Byte 16        Field length.
               Byte 17        Number of decimals.
               Bytes 18-31    Reserved.

               Note that the "RecByte" counter on the bottom is quite handy
               here: it  displays how  many bytes  one is  offset into  the
               CURRENT RECORD.   (The  first byte of any record is 0).  For
               example, to  position the cursor at the field's FIELD LENGTH
               byte, just move until RecByte equals 16.
































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          _________________________________________________________________


          Examining the data

               1)   Position  the  cursor  to  byte  8  and  read  the
                    UNSIGNED  INT  value  in  the  upper-left  of  the
                    screen.   This is  the size in bytes of the header
                    area.

               2)   Position the  cursor  at  byte  10  and  read  the
                    UNSIGNED INT  value from  the upper-left corner of
                    the screen.  This is the record size.

               3)   Set the  StartByte to the value found in step (1),
                    so that  FX will start displaying the file at this
                    point.

               4)   Set the RecSize to the value found in step (2), so
                    that FX  will format  one database  record per one
                    display line.

               Of course,  one could also just press "D" and have FX do all
               this itself, but, then, where's that sense of adventure?


               NOTE: All  deleted records  contain an  asterisk (*)  in the
               first byte  of the  record, (and therefore the first display
               column, RecByte=0),  and normal records will contain a space
               (32 decimal  or 20H  hexadecimal) at this position.  One can
               easily mark  records as deleted, and "un"-delete them, using
               FX.   Also, please  observe that  any data  changed using FX
               that alters  the value of fields used in an associated INDEX
               FILE may  render the  index file outdated, so always REINDEX
               after any changes to key field values made with FX!
























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          (C) 1990, William Noble                                   Page 32


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Summary of FX Messages


          1)   Memory-Related Error  Messages:   One of  the following
               messages may  occur if there is insufficient memory for
               fX to carry out certain tasks:

               "Not enough memory for primary i/o buffer."
               There was  insufficient memory  to allocate  this  essential
               buffer, and  FX will  therefore exit  to DOS.   Free up some
               memory and try running FX again.

               "Not enough memory to save screen contents."
               FX was  unable to  obtain enough  memory to save the current
               screen contents prior to displaying the ERROR box.

               "Not enough memory for Save Screen buffer."
               FX was  unable to  obtain enough  memory to save the current
               screen contents prior to displaying the HELP screen.

               "Not enough memory for screen/locate buffer."
               FX allocates  8K for the search buffer when it first starts.
               If it  can't find  the available  memory for  this  required
               buffer, it will exit to DOS at once.

               "Out of memory: Exiting to DOS."
               FX could  not find enough memory to build the file list when
               the select file ("F") option was invoked.


          2)   File-Related  Error  Messages:    The  following  error
               messages may  occur  if  the  file  being  examined  is
               damaged, or exists on damaged portions of the disk:

               "Error accessing this file byte!"
               FX was  unable to  seek to a certain file position.  If this
               message appears,  the file  is probably on a damaged portion
               of the disk.

               "Error closing File.  Exiting to DOS..."
               FX was  unable to  close the  file;  since having open files
               hanging around  is  not  generally  a  good  idea,  FX  will
               immediately exit under these circumstances.

               "Error seeking to starting byte."
               FX was unable to seek to the start of the file.

               "Error writing byte."
               There was an error writing the byte to the file.







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          _________________________________________________________________


               "The file  being examined  no longer  exists!    Exiting  to
               DOS..."
               After returning  from the  DOS Shell, FX found that the file
               that was  being examined  is no  longer accessible, probably
               because the user deleted this file while in the DOS Shell.

               "WARNING: Error  flushing buffers:  Cannot get  a  duplicate
               handle."
               FX was unable to flush the file buffers to disk after a byte
               was modified.

               "WARNING: Error  flushing buffers:  Cannot  close  duplicate
               handle."
               FX was unable to commit a modified byte to the file.


          3)   Status Messages

               "Byte successfully written."
               Confirms that  a modified  byte was  successfully written to
               the file.

               "Cannot Edit bytes when in ALPHA-NUMERIC mode."
               An attempt  was made  to modify  a byte by pressing CONTROL-
               ENTER when  the "PURE-ALPHA"  display  option  was  enabled.
               Press "A"  again to  toggle this  mode off,  then modify the
               byte in question.

               "No File is Selected..."
               This message  appears in  a shaded box in the File Window if
               no file  is selected.   Since  no FX  feature  can  be  used
               without a  file selected, either press "F" to select a file,
               or ESCAPE to exit the program.

               "No more occurrences found."
               Appears when NEXT is invoked, and no more occurrences of the
               byte pattern  were found  in the file after the current file
               position.

               "nnnn Occurrences found."
               Report of total occurrences found after COUNT was invoked.

               "Please select a FILE to examine."
               The user tried to invoke an option before selecting a file.

               "Value is out of range."
               The value  entered for  the StartByte, TabAmount, RecSize or
               Jump byte was out of range.


          4)   Database Messages:   The  following messages  may occur
               when the DATABASE option is invoked ("D"):




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          _________________________________________________________________


               "File is under 32 bytes in size.  Cannot be database!"
               It is  theoretically impossible  for a  database file  to be
               under 32 bytes in length.

               "File size must be over 32 bytes for data to be present."
               An attempt  was made  to examine  the data in a file of less
               than 33 bytes.

               "Note: The  first file byte NOT 2, 3 or 131.  Possible dBASE
               IV file."
               The first  byte of  all valid  dBASE III  database files  is
               either 2,  3, or  131.   FX is simply reporting that this is
               not the case for the current file.

               "Record size exceeds maximum line size."
               The database  record size  as read from the file exceeds the
               maximum allowed by FX, about 3,600 bytes.

               "The header size is impossible for this file!"
               FX read  the stored  Header Size  and Record  Size from  the
               database header  area, and found that (1) The header size is
               larger than  the over-all file size, or (2)  The record size
               is larger than the file size.


          5)   DOS Shell  Messages: One  of the following messages may
               occur when the DOS Shell option is invoked (Alt-D):

               "Cannot find COMMAND.COM!"
               FX could  not find  the  command  processor,  "COMMAND.COM".
               Check  that   the  COMSPEC  environment  variable  correctly
               specifies the  full pathname of this file.  (This is usually
               done in the "AUTOEXEC.BAT" file).

               "Insufficient memory to invoke DOS Shell."
               There is  not enough  memory to  load the command processor.
               If this  message occurs,  try to free up some memory (unload
               memory resident programs, etc.) and try again.

               "The COMMAND.COM file has invalid format."
               The "COMMAND.COM" file is, for some reason, not executable.















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          (C) 1990, William Noble                                   Page 35


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Error Handling


          In order  to be as robust as possible, FX takes over the hardware
          error handler,  interrupt 24H.   The  upshot of  this is that the
          message "Abort,  Retry, Fail"  will  never  appear  while  FX  is
          running.   Instead, in  the event  of an  error, FX will pop-up a
          special box informing the user of the nature of the problem.  The
          possible errors reported by FX are as follows:

               Bad Structure Length
               CRC Error
               Drive Not Ready
               General Failure
               Printer out of Paper
               Read Fault
               Sector Not Found
               Seek Error
               Unknown Command
               Unknown Media Type
               Unknown Unit
               Write Fault
               Write Protect


          Apart from  the "Write Protect" and "Drive Not Ready" errors, the
          chances of  one of  these errors  occurring  very  often  in  the
          context of FX is practically nil, unless, of course, one is using
          one's floppy  disks for  coasters.   For more  information on the
          import of the above errors, please consult a DOS manual.

          The interesting  and important  aspect of this, however,  is that
          FX CAN handle damaged files, literally "stepping through" corrupt
          sections of  a file  to valid  sections.   FX will always issue a
          warning when  an I/O  error has  occurred, allowing  the user  to
          ABORT FX  or simply ignore the error.  If IGNORE is selected, any
          lines that  contain unreadable areas of the file will be replaced
          with FLASHING ASTERISKS.

          In addition,  if it  is suspected  that a  file contains  damaged
          sections, or  it is desired to locate those sections, this may be
          easily accomplished  by simply  pressing the PgDn key when in the
          File window  to page  through the  file.  If there is any problem
          with the file, then the error box will pop up alerting one to the
          situation, and lines containing errors will be blinking.  This is
          an extremely powerful feature.










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          (C) 1990, William Noble                                   Page 36


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          FX Command Summary

          ESCAPE or X   Quit FX and return to DOS.
               /        Invoke the FX options menu.

          Positioning the cursor when in the File Window
          ----------------------------------------------
               Up Arrow            Previous record
               Down Arrow          Next record
               Left Arrow          Previous byte in record
               Right Arrow         Next byte in record
               ENTER               First byte in next record
               Shift + ENTER       First byte in previous record
               ALT + Left Arrow    Jump to first byte in record
               ALT + Right Arrow   Jump to last byte in record
               HOME                Jump to left edge of File Window
               END                 Jump to right edge of File Window
               PGUP                Previous screenful
               PGDN                Next screenful
               Control + PGUP      Jump to first record (Top of file)
               Control + PGDN      Jump to last record (Bottom of file)
               Control + HOME      Jump to first file byte (StartByte)
               Control + END       Jump to last byte in the file
               Tab                 Move forward by tab amount
               Shift + Tab         Move backward by tab amount
               F9                  Pan Left by 1/2 window
               F10                 Pan Right by 1/2 window

          Keys that modify the display
          ----------------------------
               A                   Toggle PURE ALPHA MODE.
               D                   Optimize the display for ".DBF" files.
               H                   Toggle hexadecimal status line notation.
               F1-F7               Select a display mode 1 through 7.
               [F1-F7]             Set  file's   display  mode  AND  adjust
                                   "RecSize" so  that each file record fits
                                   exactly in  the display  window for  the
                                   given mode.
               F8                  Cycle  through   the   numeric   display
                                   options Dec-Hex-Bin-None.

          Keys that invoke FX functions
          -----------------------------
               C                   Count occurrences of byte patterns
               F                   Select file
               J                   Jump directly to the specified file byte
               L                   Locate byte/text pattern
               N                   Locate next occurrence
               R                   Specify record size
               S                   Specify starting display byte
               ALT-S               Set StartByte at cursor position.
               T                   Specify tab amount
               CONTROL + ENTER     Modify current byte
               Alt-D               DOS Shell


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          (C) 1990, William Noble                                   Page 37


          FX User Documentation                                 Version 1.1
          _________________________________________________________________


          Notes


          1)   Fx can  easily handle  very large  files, but for files over
          999,999 bytes, the display of the byte offset of each record that
          is placed  to the left of the File Window will over-write the box
          border.   This is  NOT a  bug.   The width of the File Window (72
          columns) was chosen because 72 is evenly divisible by 1, 2 and 3,
          allowing all display modes to evenly fill the window, but leaving
          only 6  free columns  to the  left of the box.  The next smallest
          number  divisible  by  1,  2  and  3  is  66,  which  was  judged
          unacceptably smaller.

          2)   Note on  Vertical Scrolling:   FX  is optimized  to traverse
          files by  "screenfuls", using  PgUp and  PgDn.  The display will,
          however, scroll  one line  at a  time up  or down  when expected-
          When Up  Arrow is  pressed and the cursor is on the first line of
          the window,  or when  Down Arrow  is pressed and the cursor is on
          the last line of the window.  However, what really occurs in this
          case is  more of  a "shift"  in the  window on  the file  than an
          actual scroll,  since a  full screen  of data  is completely  re-
          loaded.   This was  a conscious  design decision  to ensure that,
          without  fail,   the  current   display  perfectly   mirrors  the
          underlying file  and,  further,  that  the  cursor  is  perfectly
          synchronized with  its position  both on  the display  and in the
          underlying file.    This  may  result  in  sluggish  line-by-line
          scrolling when  examining files on floppy disks or very slow hard
          disks, in which case PgUp and PgDn would be preferable for paging
          through the file quickly.

                   ______________________________________________

          FX was  coded entirely  in C  and assembly  language,  using  the
          Microsoft C  Optimizing Compiler version 5.1, and Turbo Assembler
          (TASM) 2.0;  it consists  of about  8,000 lines of C source code,
          and 1,500  lines of  assembler.   (This  is  not  necessarily  an
          endorsement of these products, but is mentioned for those who may
          be interested).  This is the second release of FX-- Version 1.1
                   ______________________________________________

          If you  have special  file formats  or requirements  and think FX
          could be  the basis  for a  useful utility in your environment, a
          proprietary version can easily be created for specific needs.  We
          will gladly  consider any  proposals and  quote pricing and terms
          for any ideas you have in mind.

          If you  have any  questions, technical  difficulties, comments or
          suggestions of any kind, we would be quite delighted to hear from
          you!   Please address all correspondence to: Far Darter Software,
          PO BOX  519, Closter,  NJ 07624.  (Registered users will be given
          priority attention).  Due to limited time, we are unable to offer
          telephone support;  however,  registered  users  are  welcome  to
          include their  phone number-   if  time allows  and the situation
          recommends itself, we will get back to you by phone.


          _________________________________________________________________
          (C) 1990, William Noble                                   Page 38




            FX Registration Information

            The registrations and licenses offered for FX (effective 12/1/90)
            are as follows:

            1)   A $15  registration  fee  is  requested  for  the  non-
                 commercial, private use of the program.

            2)   $30 -  Same as  (1), but includes printed documentation
                 and the latest version of FX.

            3)   In a  business or government environment, a $35 license
                 per user  is  mandatory.    This  license  is  for  the
                 perpetual,  non-exclusive   use  of  any  version,  and
                 automatically includes  the latest  version of  FX plus
                 printed documentation.   When registering for more than
                 one user,  please estimate  the number of copies of the
                 program  you  will  use  and  refer  to  the  following
                 discount schedule:

                 # Users        License fee
                 (Copies)       per copy
                 -------        --------------------
                 1              $35
                 2-9            $30
                 10-24          $25
                 25-49          $20
                 50-99          $10
                 100-199        $5
                 Over 200       $1000 one-time fee, unlimited copies

                 Independent of  the number  of users,  you will receive
                 one set  of materials; you may then make as many copies
                 as licensed.

            4)   FX can  also be  licensed on  a per-server  basis in  a
                 network environment,  at $125 per network server, which
                 allows FX to be installed on that one central location.
                 Access in  terms of number of nodes and number of users
                 is unrestricted  and UNLIMITED.  If more than one local
                 area network  is involved, then additional licenses for
                 each network  server are  required.   This includes the
                 latest version of FX and printed documentation; one set
                 of materials will be sent.

            5)   Distribution Licenses  and all other situations: Please
                 contact the author.  (Copying or using FX in any manner
                 other than outlined above is prohibited).


            Please send  all registrations,  inquiries  or  comments  to  the
            address on  the next page.  We accept personal or company checks,
            money orders,  or Visa,  MasterCard or American Express.  Sorry--
            we don't handle purchase orders or invoicing.

            (Upgrades will be made available upon request).


            *****************************************************************
            *  Version 1.1      FX Registration Form     Effective 12/1/90  *
            *****************************************************************

                          Please send to:  Far Darter Software
                                           PO Box 519
                                           Closter, NJ
                                           07624

            Limit of Liability:
                 FX  is   distributed  as-is.     The  author  disclaims  all
                 warranties, expressed or implied.  The author will assume no
                 liability for  damages either  from the  direct use  of this
                 product or as a consequence of the use of this product.



            Please register/license my copy of FX as:  (Select one)

               (1) Single user basic registration @ $15.00         __________

               (2) Single user "plus" registration @ $30.00        __________

               (3) Business/Government: _____ users @ _____     =  __________
                                     (See discount schedule)

               (4) LAN, @ 125.00 per Server:  _____ @ $125      =  __________

                                                     Subtotal:     __________


                New Jersey residents add 6% sales tax            + __________

                                                         Total:    __________



            Payment: [] Check   [] Visa   [] MasterCard   [] American Express

            Card Number:     ________________________________________________

            Expiration date: ________________________________________________

            Name:    ________________________________________________________

            Company: ________________________________________________________

            Address: ________________________________________________________

            City, State, Zip: _______________________________________________

            Phone-  Day: ______________________   Nite: _____________________

            Signature:   ______________________   Date: _____________________




                            Thanks for supporting Shareware!



               Index



          /  FX Command Menu  2
          /? Help listing switch  6
          /A (Alpha mode character) switch  5
          /A (Pure Alphanumeric display mode) switch  5
          /H (Hex notation) switch  5
          /J (Jump) switch  5
          /M (Initial Display Mode) switch  5
          /M (Initial Numeric Display Mode) switch  5
          /Q (Quiet) switch  5
          /R (Record Size) switch  6
          /S (Start Byte) switch  6
          /T (Tab Amount) switch  6
          Alpha mode  13, 20, 34
          ASCII
               In display modes  16, 20
               Numeric Display notation  22
          AUTOEXEC.BAT file  19, 35
          Binary
               Numeric Display using  24
          Bit  22
          Byte  22
          Byte location counter  28
          Cell  26
          Cell size  21
          CGA monitors  3
          Command line arguments  4
          Command Summary  13, 37
          COMMAND.COM file  19, 35
          COMSPEC environment variable  19, 35
          Counting byte patterns  18
          Current directory  15
          Current file location  28
          Cursor size  21
          Damaged files  36
          Database files  30
          DATABASE option
               Messages  34
          Databases
               Displaying  24
               Structure of  30
          Decimal
               In display modes  16, 20
               Numeric Display notation  22
               Numeric Display using  23
          Display mode  12, 26
               Alpha-Numeric  20
               Changing the  12, 20, 21






          DOS Shell
               Error messages  35
          Dos Shell option  13, 19
          DOS version  3
          Double Words  22
          Editing keys  8
          Error handling  36
          Error messages
               File-related  33
               Memory-related  33
          File
               Selecting  15
          File name
               Specifying on command line  5
          File Window  10
          File Window commands  13
          Hardware Requirements  3
          Help, invoking  2, 13
          Hexadecimal
               In display modes  16, 20
               Numeric Display notation  22
               Numeric Display using  23
               Status line notation  12, 13, 24
          I/O Errors  36
          Installation  4
          Integer  22
          LANs
               Registering FX for  A
               Using FX on  3
          Least Significant Bit (LSB)  22
          Locating bytes  16
          Long Integer  22
          Memory requirements  3
          Menus, using  8
          Messages
               File-related  33
               For DATABASE option  34
               For DOS Shell option  34, 35
               Memory-related  33
               Status  34
          Modified
               Display of  29
          Modifying a byte  18
          Monitor type  3
          Most Significant Bit (MSB)  22
          Mouse support  3
          Network Registration  A
          Network support  3
          Numbers, entering  8
          Numeric entry box  8
          Numeric equivalent display  22






          Options Menu  14
          PATH environment variable  4
          Pure Alpha mode  20
          Quick start  2
          Quitting FX  13
          Recbyte  29
          Record
               Display of  28
               Offset into  29
          Record size  27, 29
               Default  10
               Definition  10
          RecSize  21, 24, 26
               Modifying  27
          Registration form  B
          Registration Information  A
          Scrolling  26
               Vertical  38
          SHARE program  3
          Sign bit  23
          Signed numbers  23
          StartByte  17, 24, 27
               Modifying  27
          Starting file byte  27
          Starting FX  2
          Status messages  34
          Tab amount, setting  28
          Technical support  38
          Two's compliment arithmetic  23
          Unsigned numbers  23
          Video mode  3
          Word (2 byte integer)  22
