--------------Krell's Logo-------------
A 4am crack                  2017-11-26
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Name: Krell's Logo
Version: rev. 0 (*)
Genre: programming
Year: 1982
Credits: Mark Friedland
Publisher: Krell Software
Platform: Apple ][+ or later
Media: single-sided 5.25-inch floppy
OS: DOS 3.3
Previous cracks: none (of this version)

(*) Compared to 4am crack no. 30, this
    disk has a simpler text-based title
    screen, an earlier copy protection
    scheme, and support for older (32K)
    Apple II machines, suggesting an
    earlier revision. Both are labeled
    "revision A."

This disk was automatically cracked by
Passport. Here is the transcript:

                 --v--

READING FROM S6,D1
T00,S00 FOUND DOS 3.3 BOOTLOADER
USING DISK'S OWN RWTS
WRITING TO S5,D2
T1B FOUND NIBBLE COUNT PROTECTION
SWITCHING TO BUILT-IN RWTS
T02,S03 DISK CALLS A PROTECTION CHECK AT
$B4BB BEFORE INITIALIZING DOS.
T02,S03,$DE: ADFFCF -> 4C849D
T00,S03,$91: ED -> DE
CRACK COMPLETE.

                 --^--

More information and source code is
available at
https://archive.org/details/Passport4am

Quod erat liberandum.

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A 4am crack                    No. 1560
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