-ARCO Computer Preparation for the SAT-
A 4am crack                  2017-04-21
---------------------------------------

Name: ARCO Computer Preparation for the
  SAT
Genre: educational
Year: 1984
Credits: Shadow Lawn Press
Publisher: ARCO Publishing
Platform: Apple ][+ or later
Media: 8 single-sided 5.25-inch disks
OS: DOS 3.3
Previous cracks: none

Disk 3 was damaged beyond my ability to
repair it. I've included a partial .edd
image with the bad sectors.

This disk was automatically cracked by
Passport. Here is the transcript for
disk 1:

                 --v--

READING FROM S6,D1
T00,S00 FOUND DOS 3.3 BOOTLOADER
USING DISK'S OWN RWTS
WRITING TO S5,D2
SWITCHING TO BUILT-IN RWTS
T00,S03,$91: AA -> DE
T00,S03,$35: AA -> DE
T00,S06,$AE: AA -> DE
T00,S02,$9E: AA -> DE
T00,S08 RWTS REQUIRES A NON-STANDARD
DISK VOLUME NUMBER.
T00,S08,$12: B148 -> A900
CRACK COMPLETE.

                 --^--

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

Other disks have identical protection.

Quod erat liberandum.

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A 4am crack                    No. 1162
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