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Unprotect Sierra On-Line's 3D Helicopter. by Independent (IND)

94 of 574 files independent
4 items
  • CODE.OVL
  • HELI.DAT
  • HELI.DOC
  • HELIUNP.DOC
  • Zip / Text   How to
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        This procedure will enable you to unprotect Sierra On-Line's 3D
        HELICOPTER game.  The procedure is based on an unprotect
        procedure for KING'S QUEST III, by an unknown author.

        There are two files included in this ARC package:

                1.  HELI.DOC - This file
                2.  HELI.DAT - Supplementary file needed during DEBUG session.

        The procedure is relatively simple:

        1) Put a blank, formatted diskette in drive B, and the HELICOPTER Disk
        #1 in drive A, then at the A> prompt, COPY *.* B:.  Then put Disk #1
        away - you won't need it anymore!

        2) Load DEBUG, making sure both HELI.COM (on the backup disk) and
        HELI.DAT (from this package) are both in the current path or on the
        default drive.

        3) Use DEBUG to patch HELI.COM.

                -N HELI.COM
                -L
                -R                            (Record value of CX register)
                -N HELI.DAT
                -L 141
                -E 366
                XXXX:0366 E8.90 7D.90 03.90
                -N HELI.COM
                -R CX
                CX 0080
                :????                         (Enter value of CX you recorded)
                -W
                -Q

        4) That's all there is to it.  HELICOPTER is now unprotected.