Unfortunately, this site has restricted functionality as this browser does not support the HTML button formaction attribute.
Unfortunately, this site has restricted functionality as this browser has HTML web storage turned off.

Unprotect Sierra On-Line's Heilcopter. by Independent (IND)

96 of 574 files independent
2 items
  • THEXDER.DAT
  • THEXDER.DOC
  • Zip / Text   How to
  • 1 kB   DOWNLOAD   SHARE
hide RetroTxt by Defacto2   The open source web-extension to view many ANSI, ASCII and NFO files as text in your browser, available on Chrome Firefox GitHub
[+] Configuration Select all
        This procedure will enable you to unprotect Sierra On-Line's HEILCOPTER
        game.

        There are two files included in this ARC package:

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


        The procedure is:

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

        2) Copy THEXDER.DAT onto the backup disk

        3) Load DEBUG, making sure both THEXDER.COM (on the backup disk) and
        THEXDER.DAT (from this package) are both on the default drive.

        4) Use DEBUG to patch THEXDER.COM.

                A>DEBUG THEXDER.COM
                -R             (Record value of CX register)
                -N THEXDER.DAT
                -L 141
                -E 34F
                XXXX:034F E8.90 7D.90 03.90   <-- Enter 3 Nop's (90h)
                -N THEXDER.COM
                -R CX
                CX 0080
                :????           (Enter value of CX you recorded)
                -W
                -Q

        5) That's all there is to it.  THEXDER is now unprotected.


        Now you can run THEXDER directly from your hard disk.