51 lines
2.2 KiB
Erlang
51 lines
2.2 KiB
Erlang
*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*:*
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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: Mr. Cool
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=-----------------------------------------------------------------------------=
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Mr. Cool is a 3-dimensional Q-Bert type game that has copy protection differ
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ent that the others described in this tutorial so far.
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=> Boot your DOS 3.3 system master and insert a blank disk
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=> Type INIT HELLO. When you get the ] or > prompt, type DELETE HELLO.
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=> Insert Mr. Cool disk and type "BRUN MRCOOL"
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=> When the picture comes up, hit [ RESET ]. Type "CALL -151" to enter monitor.
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=> Type 4000: EA EA EA (this removes the nibble count)
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=> Type 8500: 60 (this removes the high score read)
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=> Type 876C: 60 (this removes the high score write)
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=> Insert the disk you just formatted and type "BSAVE MR. COOL,A$4000,L$5500"
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Notes: The "4000: EA EA EA" is the start of the nibble count routine. Putting
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"EA EA EA" in locations $4000-$4002 places the NOP (or No OPeration) code in
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place of the jump to the nibble count. The "8500: 60" removes the high score
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read routine. The routine starts at $8500 and by placing a $60 (ReTurn from
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Subroutine) it never executes the routine and jumps back to the main progam.
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"876C: 60" removes the high score write. It is the same as above. The reason
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for disabling the high score functions is simple. If not disabled, when the
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high socres are written to the disk, it would overwrite part of the MR. COOL
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file or whatever else happens to be on the sectors that it uses to store the
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names and scores. The read function is disabled because when it read the data
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from the disk it woud crash because those aren't the names and scores.
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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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