49 lines
1.8 KiB
Plaintext
49 lines
1.8 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: Print Shop
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=-----------------------------------------------------------------------------=
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Print shop, by Broderbund Software, was well written by its two authors,
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David Balsam and Martin Kahn. It makes terrific banners, signs, letter heads,
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among other things and the doccumentation is excellent. The docs were typed by
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Dr. Vax and can be found on Apple Manor. The de-protection is more complicated
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than any other we have yet seen.
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=> Use Disk Editor 2.0 to search for (in hex) 20 16 70
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=> Replace (with a sector editor) all mentioned locations containing 20 16 70
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(approx. 15) in them to EA EA EA.
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=> Replace (with a sector editor) all mentioned locations containing 20 F9 77
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(approx. 2) in them to EA EA EA.
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Notes: "20 16 70" is the machine language code for Jump to SubRoutine to $7016,
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which is the beginning of a nibble count. "20 F9 77" is the machine language
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code for Jump to SubRoutine $77F9 which is the beginning of a routine that is a
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fake nibble count which jumps to the real nibble count. By replacing them with
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"EA EA EA" standing for NOP or No OPeration, we eliminate the jumps to these
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locations and therefore never execute the nibble counts, making the program
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de-protected.
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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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