Category : Unprotects for Games and Such
Archive   : UNP-A-D.ZIP
Filename : DAMBUST.UNP

To unprotect "The Dambusters" from Accolade use the following debug
proceedure. Note that even recent version versions of CopyIIPC cannot
copy this software, and to protect your investment you will want to use
this unprotect.

1) Copy DAMB.EXE to a formated blank diskette.

2) REN DAMB.EXE DAMB.BIN

3) DEBUG DAMB.BIN

4) Now search for the use of INT 13

-s 0000 FFFF CD 13


I found this call at 13BC:0116
You may find it at a different location, but as long as the number ends
in 16 you have the correct location. If it doesn't end with a 16 then
you may have a different version and this unprotect may not work.

5) Next look at the code after this call

-u XXXX:XX16

You should see the following:

XXXX:XX16 CD13 INT 13
XXXX:XX18 7306 JNB 0120

If this is different, you may have a different version. Stop now.

6) Now change the jump to an unconditional jump

-e XXXX:XX18 EB 06

7) Now write the changes back to disk and end the debug session

-w
-q

8) REN DAMB.BIN DAMB.EXE

9) Now place your original diskette in a safe place.


March 25, 1985
--------------------------------Disk Designer----------------------------------