Unprotect Sierra On-Line's Heilcopter by Independent (IND)
72 of 863 files
independent
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Last modified Jun 21, 2015 8:40:48 PM
MD5 checksum fb29fd1d5405cb7a241a37850fbf6e1b
Mime type Zip archive data
Download THEXDER.zip
Size 954 B
1987 November 17
- Text / Guides and how-tos
2 items in the archive
- THEXDER.DAT
- THEXDER.DOC
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.