Unprotect for Rack`em by Independent (IND)
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Last modified Jan 15, 1989 11:39:10 AM
MD5 checksum 838746a8177194ba3bd5033a7148e66a
Mime type ASCII text, with CRLF line terminators
Download RM-UNP.TXT
Size 2 kB
1989 January 15
- Text / Guides and how-tos
- Super Dave, writer credits
Unprotect for Rack'em
BE SURE TO BACKUP YOUR PROGRAM DISK BEFORE STARTING AND USE THE
BACK UP FOR THE UNPROTECT.
Modify only the backup copy!!!
First you should rename the file or files
POOL.EXE TO POOL
Ex. C>rename pool.exe pool
Next Load program into debug...
Ex. C>debug pool
Then Follow the sample debug session:
-rcs : get segment address
CS XXXX
XXXX=XXXX+1000H : add 1000H to segment address
(These numbers are in hex. If you are
unfamiliar with the adding of hex
numbers don't attempt this patch)
-s XXXX:0000 ffff 06 56 57 9a : Search for protection pattern
XXXX:YYYY : The search will return one address.
If more than one is returned
this unprotect may not work.
ZZZZ=YYYY+0003 : Add 3 to the address found
(These numbers are in hex. If you are
unfamiliar with the adding of hex
numbers don't attempt this patch)
-e XXXX:ZZZZ eb 0c 90 90 90 : Edit the contents of the computed
address
Now write the new pool game back to the disk:
-w <Enter>
Writing XXXX bytes
Then Quit Debug:
-q <Enter>
Now it is time to rename pool back to pool.exe
C>ren pool pool.exe
Now try to run the new (Hopefully) unprotected version of Rack'em
C>pool
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Unprotect Brought to you courtesy of Super Dave
Super Dave can be reached at:
The Download Depot BBS
(803) 269-7899
Greenville, SC