=== Repairing Atari 8-bit DOS binary executables with the BINTRIM package ===

  [version 1.0.1]

  The BIN/TRIM suite consists of two programs which can help you to repair
  broken Atari binary executables.

  o BIN <file> lists the segments of an executable, as follows:

      Column 1: hex offset of sement start from file start
      Column 2: contains an asterisk if the segment is preceded by $FFFF
      Column 3: FROM(hex)-TO(hex): BYTES(dec) lists segment boundaries
      Column 4: Number of bytes in file up to and including current segment
      Column 5: Exec (RUNADR) and Init (INIADR) if loaded by last segment

  o TRIM <count> <file> cuts off the file after byte $count.

  Example of a repair:

--> BIN SPYHUNTR

  yields the following:

---------------------------------------------------------------- spyhuntr
0000 | * | 0601-062C:    44 |     50 |
0032 |   | 4000-4057:    88 |    142 |
008E |   | 4800-8D51: 17746 |  17892 |
45E4 |   | 02E0-02E1:     2 |  17898 | [Exec: 0601]
45EA |   | 1A1A-1A1A:     1 |  17903 |
45EF |   | 1A1A-1A1A:     1 |  17908 |
45F4 |   | 1A1A-1A1A:     1 |  17913 |
45F9 |   | 1A1A-1A1A:     1 |  17918 |
45FE |   | 1A1A-1A1A:     1 |  17923 |
4603 |   | 1A1A-1A1A:     1 |  17928 |
4608 |   | 1A1A-1A1A:     1 |  17933 |
460D |   | 1A1A-1A1A:     1 |  17938 |
4612 |   | 1A1A-1A1A:     1 |  17943 |
4617 |   | 1A1A-1A1A:     1 |  17948 |
461C |   | 1A1A-1A1A:     1 |  17953 |
4621 |   | 1A1A-1A1A:     1 |  17958 |
4626 |   | 1A1A-1A1A:     1 |  17963 |
462B |   | 1A1A-1A1A:     1 |  17968 |
4630 |   | 1A1A-1A1A:     1 |  17973 |
4635 |   | 1A1A-1A1A:     1 |  17978 |
463A |   | 1A1A-1A1A:     1 |  17983 |
463F |   | 1A1A-1A1A:     1 |  17988 |
4644 |   | 1A1A-1A1A:     1 |  17993 |
4649 |   | 1A1A-1A1A:     1 |  17998 |
464E |   | 1A1A-1A1A:     1 |  18003 |
4653 |   | 1A1A-1A1A:     1 |  18008 |
4658 |   | 1A1A-1A1A:     1 |  18013 |
465D |   | 1A1A-1A1A:     1 |  18018 |
4662 |   | 1A1A-1A1A:     1 |  18023 |
4667 |   | 1A1A-1A1A:     1 |  18028 |
466C |   | 1A1A-1A1A:     1 |  18033 |
4671 |   | 1A1A-1A1A:     1 |  18038 |
4676 |   | 1A1A-1A1A:     1 |  18043 |
467B |   | 1A1A-1A1A:     1 |  18048 |
----------------------------------------------------------------
{ 34} spyhuntr

  It is obvious from this listing, that after the 17,898th byte, things go
  wrong. Somehow, $1A bytes have been added, probably during some modem
  transfer ($1A is Control-Z, often used as the End-Of-File marker).

  To delete the last bytes, we look in the 5th column next to the last 'good'
  segment; it says 17,898 which means that this last good segment ends at
  byte #17,898. We now type

--> TRIM 17898 SPYHUNTER

  ...and if we do another BIN SPYHUNTER now, we get the following, corrected
  SpyHunter binary:

---------------------------------------------------------------- spyhuntr
0000 | * | 0601-062C:    44 |     50 |
0032 |   | 4000-4057:    88 |    142 |
008E |   | 4800-8D51: 17746 |  17892 |
45E4 |   | 02E0-02E1:     2 |  17898 | [Exec: 0601]
----------------------------------------------------------------
{  4} spyhuntr

  The file has been repaired!

  The programs are distrubuted both as source code and as executables; the
  reason the executables are relatively big is that the programs were
  written using DJGPP v2.01 and have some protected mode stuff prepended to
  them, to make sure they work on a lot of configurations (as long as you
  have a 386 or better, you should be safe).

  Anyway, I hope this program is useful in some way.

  N.B. This program is free software as described in the GNU Public License.
       Read the GPL for info.

Regards,

  Sidney Cadot
  sidney@ch.twi.tudelft.nl