74 lines
2.5 KiB
Plaintext
74 lines
2.5 KiB
Plaintext
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*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*
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:* *:
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*: High Technology's :*
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:* Cracking Tutorial *:
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*: :*
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:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:
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Written by:
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High Technology & Sherlock Apple!
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Written for: Sherwood Forest ][ and Sherwood Forest ///
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=-----------------------------------------------------------------------------=
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This weeks topic: Electronic Arts (EOA)
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=-----------------------------------------------------------------------------=
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Electronic Arts, are the makers of One On One, Last Gladiator, Archon, Cut
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and Paste, and many other excelent products. Their protection scheme is fairly
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standard and the text below will mork for most of their stuff.
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=> Boot the DOS 3.3 System Master. When you get the ] prompt, type INIT HELLO.
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=> Next, insert your Advanced Demuffin disk in the drive. Type "BRUN ADVANCED
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DEMUFFIN 1.1"
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=> Type CALL -151 to enter monitor then 3 machine language codes:
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[1] B8F1: BB [ RETURN ] [2] B8FC: CF [ RETURN ] [3] 803G [ RETURN ]
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=> Boot up a sector editor and read Track $20, Sector $0F. Write it onto Track
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$03, Sector $00.
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=> Now use a bit copy program (such as EDD or Locksmith) to copy tracks 0-2 of
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the origional disk to your converted disk.
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This converts the disk to standard DOS 3.3, except the RWTS...lets take
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care of that right now...
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=> Now use a sector editor to read Track $02, Sector $03. Change bytes:
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[1] $47 from $BB to $BA [2] $51 from $CF to $AD
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This changes the RWTS checksums on the disk to standard DOS 3.3 RWTS.
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=> Now read Track $01, Sector $0F
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=> Change bytes $68-$6A from 20 A2 A1 to 18 60 EB
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This removes the nibble count.
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-> If you are working on Cut & Paste or Last Gladiator stop here <-
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=> One On One and others: Read Track $0C, Sector $04. Change bytes $06-$08 from
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A0 18 88 to 18 60 C8. Changes bytes $DC and $DD from A0 FF to 18 60. Read
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Track $09, Sector $02. Change byte $1F from $01 to $FD.
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You removed the secondary nibble count found in most EOA games except Last
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Gladiator and Cut & Paste. One On One is the example used here. If this last ni
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bble count is not removed, the game will function normally but the players heads
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will spin (How sneaky!!!).
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=-----------------------------------------------------------------------------=
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_________________
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| Happy Cracking! |
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| High Technology |
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| The Apple Mafia |
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|_________________|
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- End of File -
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