Unprotect for PaperBoy by Independent (IND)
1 of 23 files
super dave
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Last modified Dec 11, 1988 9:47:20 AM
MD5 checksum e5df9c20151c6bca08095a8f88602b78
Mime type ASCII text, with CRLF line terminators
Download PAPERUNP.TXT
Size 2 kB
1988 December 11
- Text / Guides and how-tos
- Super Dave, writer credits
Unprotect for PaperBoy (IBM PC)
BE SURE TO BACKUP YOUR PAPERBOY DISK BEFORE STARTING AND USE THE
BACK UP FOR THE UNPROTECT.
Modify only the backup copy!!!
First you should rename the file or files
PAPERCGA.EXE TO PAPERCGA
PAPERCG2.EXE TO PAPERCG2
PAPERCGT.EXE TO PAPERCGT
Ex. C>rename papercga.exe papercga
Next Load program into debug...
Ex. C>debug papercga
Then Follow the sample debug session:
-s 0000 ffff cd 21 32 e4 9a : Search for first protection pattern
XXXX:YYYY : The search will return one address.
If more than one is returned
this unprotect may not work.
ZZZZ=YYYY+0004 : Add 4 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 ZZZZ eb 03 90 90 90 : Edit the contents of the computed
address
-s 0000 ffff 1f b8 48 00 9a : Search for second protection pattern
XXXX:YYYY : The search will return one address.
If more than one is returned
this unprotect may not work.
ZZZZ=YYYY+0004 : Add 4 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 ZZZZ eb 03 90 90 90 b8 33 00 90 90
: Edit the contents of the computed
address
Now write the new papercga game back to the disk:
-w <Enter>
Writing XXXX bytes
Then Quit Debug:
-q <Enter>
Now it is time to rename papercga back to papercga.exe
C>ren papercga papercga.exe
Now try to run the new (Hopefully) unprotected version of PaperBoy
C>papercga
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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