F-19 Unprotection  -  January 1989    ADMHOU        

          If you are like me you hate using the floppy drive after
     you've put software on the hard disk.  The whole concept of
     using a key diskette after I've put out 50 or 60 dollars for
     the latest game just bugs me.  Games companies always claim
     that copy protection keeps them from charging more for a game.
     This is bunk!  You still pay more ... for the copy-protection!
     The purpose of protecting a piece of software is to protect the
     profits of the game company and nothing more.  Normally I have
     nothing against protecting the profits of a legimitate business
     concern like the one that produced F-19 Stealth Fighter, as
     this company puts out fine games.  I DO object to paying extra
     for their protection only to find out that what I've payed for
     will also greatly inconvienence me!  First we have to put the
     "KEY" diskette in Drive A: ... then we must answer some silly
     quiz from the manual ... while we patiently wait for 4, yes 4
     programs to churn their way into memory, slowly re-locating 
     the protection code.  No that's not all ... now they want to
     perform a little Boolean on the relocated code so that is is
     now executable.  All the while, you sit ... and wait ... and
     wait ... and wait ...  until 2 or 3 minutes later, you are
     finally ready to start the game.  Enough of this!  

          The following pages give instructions for unprotecting
     F-19 Stealth Fighter by Microprose Version 435.01.  The
     original files on disk A: should look like this:

          SU.EXE             17661     10-15-88     11:30a
          START.EXE          87599     10-15-88     11:59a

          If these 2 files on your Disk A do not have the same
     date and time stamp as mine, then this unprotect procedure
     may not work for you.

          The unprotect for the program SU.EXE removes the need
     for the "KEY" diskette and allows you to run from floppy or
     hard disk without ever getting the "KEY" disk message.

          The unprotect for START.EXE will make you a whiz at
     guessing the answer on the aircraft quiz screen.  No matter
     what you guess, you'll be right!

          I normally only write these for myself, but this one 
     makes me mad.  So here it is, for free, for all you game
     lovers out there.  As for you people out there at Microprose,
     be glad I didn't just load the whole thing into an archive
     and start uploading to bulletin boards.   Ummmm .....?

                                           ADMHOU	



                    F-19 STEALTH FIGHTER Version 435.01     


              SU.EXE             17661     10-15-88     11:30a
              START.EXE          87599     10-15-88     11:59a
     

     1. Copy the programs SU.EXE and START.EXE from Disk A to
        another floppy or a subdirectory on your hard disk using
        the dos copy command.  The DOS program DEBUG.EXE should
        be present or a path should be set to it.

     2. Rename SU.EXE to SU.FIL

     3. Rename START.EXE to START.FIL

     4. At the DOS prompt, type exactly what you see here and follow
        each line with a carriage return:

        
        DEBUG SU.FIL
        F 18D0 18F6 90
        E 2E70 BB 56
        E 2E7C B7 4E
        E 2E95 75 76 E7 E8 E9 EA EB EC ED EE EF
        E 2ED0 20 21 22
        E 2F11 61 62
        E 2F20 90 91
        E 2F2F 9F 80 81
        E 2F34 84 85
        E 2F3A 8A 8B 8C
        W        
        Q
        REN SU.FIL SU.EXE



        DEBUG START.FIL
        E 96A8 90 90 90
        W
        Q
        REN START.FIL START.EXE



     5. Now copy all the files from your original disk A: onto
        a blank diskette using the DOS Copy command.
        Do NOT use diskcopy for this!

     6. Copy these 2 newly modified programs to the diskette
        created in step 5 above.
 
    7. You now have a disk A: that is completely un-protected.





          If you have problems using this unprotect, I have provided
     the following listing of the memory offsets for SU.FIL and
     START.FIL,  both original and modified values.  If the originals
     do not match your programs, then the modified values won't
     work for you.
        



Program :  SU.FIL


MEMORY OFFSET 18D0
Original Value = 3D
New Value      = 90
MEMORY OFFSET 18D1
Original Value = 02
New Value      = 90
MEMORY OFFSET 18D2
Original Value = 00
New Value      = 90
MEMORY OFFSET 18D3
Original Value = 75
New Value      = 90
MEMORY OFFSET 18D4
Original Value = 0A
New Value      = 90
MEMORY OFFSET 18D5
Original Value = BA
New Value      = 90
MEMORY OFFSET 18D6
Original Value = 96
New Value      = 90
MEMORY OFFSET 18D7
Original Value = 09
New Value      = 90
MEMORY OFFSET 18D8
Original Value = B4
New Value      = 90
MEMORY OFFSET 18D9
Original Value = 09
New Value      = 90
MEMORY OFFSET 18DA
Original Value = CD
New Value      = 90
MEMORY OFFSET 18DB
Original Value = 21
New Value      = 90
MEMORY OFFSET 18DC
Original Value = E9
New Value      = 90
MEMORY OFFSET 18DD
Original Value = 8D
New Value      = 90



MEMORY OFFSET 18DE
Original Value = 00
New Value      = 90
MEMORY OFFSET 18DF
Original Value = 3D
New Value      = 90
MEMORY OFFSET 18E0
Original Value = 08
New Value      = 90
MEMORY OFFSET 18E1
Original Value = 00
New Value      = 90
MEMORY OFFSET 18E2
Original Value = 75
New Value      = 90
MEMORY OFFSET 18E3
Original Value = 0A
New Value      = 90
MEMORY OFFSET 18E4
Original Value = BA
New Value      = 90
MEMORY OFFSET 18E5
Original Value = A9
New Value      = 90
MEMORY OFFSET 18E6
Original Value = 09
New Value      = 90
MEMORY OFFSET 18E7
Original Value = B4
New Value      = 90
MEMORY OFFSET 18E8
Original Value = 09
New Value      = 90
MEMORY OFFSET 18E9
Original Value = CD
New Value      = 90
MEMORY OFFSET 18EA
Original Value = 21
New Value      = 90
MEMORY OFFSET 18EB
Original Value = EB
New Value      = 90
MEMORY OFFSET 18EC
Original Value = 7F
New Value      = 90
MEMORY OFFSET 18DC
Original Value = 90  (This one didn't need changing)
New Value      = 90
MEMORY OFFSET 18EE
Original Value = BA
New Value      = 90
MEMORY OFFSET 18EF
Original Value = C8
New Value      = 90



MEMORY OFFSET 18F0
Original Value = 09
New Value      = 90
MEMORY OFFSET 18F1
Original Value = B4
New Value      = 90
MEMORY OFFSET 18F2
Original Value = 09
New Value      = 90
MEMORY OFFSET 18F3
Original Value = CD
New Value      = 90
MEMORY OFFSET 18F4
Original Value = 21
New Value      = 90
MEMORY OFFSET 18F5
Original Value = EB
New Value      = 90
MEMORY OFFSET 18F6
Original Value = 75
New Value      = 90




MEMORY OFFSET 2E70
Original Value = 4E
New Value      = BB
MEMORY OFFSET 2E71
Original Value = E5
New Value      = 56



MEMORY OFFSET 2E7C
Original Value = 28
New Value      = B7
MEMORY OFFSET 2E7D
Original Value = 55
New Value      = 4E



MEMORY OFFSET 2E95
Original Value = 74
New Value      = 75
MEMORY OFFSET 2E96
Original Value = 74
New Value      = 76
MEMORY OFFSET 2E97
Original Value = 44
New Value      = E7
MEMORY OFFSET 2E98
Original Value = A3
New Value      = E8



MEMORY OFFSET 2E99
Original Value = C0
New Value      = E9
MEMORY OFFSET 2E9A
Original Value = 7B
New Value      = EA
MEMORY OFFSET 2E9B
Original Value = 7B
New Value      = EB
MEMORY OFFSET 2E9C
Original Value = F7
New Value      = EC
MEMORY OFFSET 2E9D
Original Value = A8
New Value      = ED
MEMORY OFFSET 2E9E
Original Value = B3
New Value      = EE
MEMORY OFFSET 2E9F
Original Value = 6C
New Value      = EF




MEMORY OFFSET 2ED0
Original Value = 58
New Value      = 20
MEMORY OFFSET 2ED1
Original Value = 4E
New Value      = 21
MEMORY OFFSET 2ED2
Original Value = B2
New Value      = 22



MEMORY OFFSET 2F11
Original Value = 3C
New Value      = 61
MEMORY OFFSET 2F12
Original Value = D3
New Value      = 62



MEMORY OFFSET 2F20
Original Value = EB
New Value      = 90
MEMORY OFFSET 2F21
Original Value = 1A
New Value      = 91



MEMORY OFFSET 2F2F
Original Value = E7
New Value      = 9F
MEMORY OFFSET 2F30
Original Value = 1C
New Value      = 80
MEMORY OFFSET 2F31
Original Value = 11
New Value      = 81



MEMORY OFFSET 2F34
Original Value = 61
New Value      = 84
MEMORY OFFSET 2F35
Original Value = 12
New Value      = 85



MEMORY OFFSET 2F3A
Original Value = F2
New Value      = 8A
MEMORY OFFSET 2F3B
Original Value = 1A
New Value      = 8B
MEMORY OFFSET 2F3C
Original Value = 1C
New Value      = 8C

End of Changes To SU.FIL



Program :  START.FIL

MEMORY OFFSET 95A8
Original Value = E9
New Value      = 90

MEMORY OFFSET 95A9
Original Value = 98
New Value      = 90

MEMORY OFFSET 95AA
Original Value = 00
New Value      = 90

End Of Changes To START.FIL