Dec 122017
 
Unprotect for the sierra game of THEXDER.
File THEXDER.ZIP from The Programmer’s Corner in
Category Unprotects for Games and Such
Unprotect for the sierra game of THEXDER.
File Name File Size Zip Size Zip Type
THEXDER.DAT 128 128 stored
THEXDER.DOC 1348 598 deflated

Download File THEXDER.ZIP Here

Contents of the THEXDER.DOC file


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.



 December 12, 2017  Add comments

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