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- 31. How do I defeat Copy Protection?
-
- There are two common methods of defeating copy protection. The first is to
- use a program that removes copy protection. Popular programs that do this
- are CopyIIPC from Central Point Software and CopyWrite from Quaid Software.
- The second method involves patching the copy protected program. For popular
- software, you may be able to locate a ready made patch. You can them apply
- the patch using any hex editor, such as debug or the Peter Norton's
- DiskEdit. If you cannot, you must patch the software yourself.
- Writing a patch requires a debugger, such as Soft-Ice or Sourcer. It also
- requires some knowledge of assembly language. Load the protected program
- under the debugger and watch for it to check the protection mechanism. When
- it does, change that portion of the code. The code can be changed from JE
- (Jump on Equal) or JNE (Jump On Not Equal) to JMP (Jump Unconditionally).
- Or the code may simply be replaced with NOP (No Operation) instructions.
-