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1 of 1 file disk designer

1985 March 25

  • Text / Guides and how-tos
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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----------------------------------
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