UNP - SPYHUNT.ZIP - SPYHUNT.UNP

 
Output of file : SPYHUNT.UNP contained in archive : SPYHUNT.ZIP

Unprotect for Spy Hunter (a game on the IBM PC).
From: The Ross DOS
5-26-86

Spy Hunter is one of those annoying programs that has to be
booted from the original diskette to use. Yet, it is such a good
game that I felt that a little effort on my part was in need.
Using this unprotect, you too can have a broken Spy Hunter game;
this allows you to make archive backups and even store it on your
hard disk.

The protection method is outlined below:

-it has to be booted from the original disk
-the boot sector
-checks for a unreadable track # 1
-checks your system for enough memory and color adapter
-loads the game from track #2 to track #30
-once the game is loaded
-the CS is at 100:1000
-the DS and ES is at 200:0000
-the SS is at 1E00
-the SP is at 1FF0
-the execution starts at 100:1000

I used Symbolic Debug to get the program off the disk and into a
file. I saved this procedure in the file SPYHUNT.SD. If you
don't have Symbolic Debug, then just use debug and modify it a
bit. By tracing through the boot sector program, I found that
the file I made could be directly loaded into memory. I then
wrote an assembly program to load the game and run it. This file
is SPYHUNT.EXE.

Briefly, you simply have to go through the files
SPYHUNT.SD
and run SPYHUNT.EXE to run it.

Addition files:

SPYHUNT.ASM - source for SPYHUNT.EXE