------------The Math Busters-----------
A 4am crack                  2017-02-27
---------------------------------------

Name: The Math Busters
Version: 1 (*)
Genre: educational
Year: 1984
Credits: Tom Snyder Productions
Publisher: Spinnaker Software
Platform: Apple ][+ or later
Media: 1 single-sided 5.25-inch disk
OS: DOS 3.3

(*) My previous release of this game,
crack no. 279, was actually a later
version. This version BLOADs BOOTER.OBJ
at $9400. The other version BLOADs
BOOTER.OBJ at $92D0, which decrypts a
protection check and eventually jumps
to $9400. There are no other changes
between the two versions. They updated
the protection and re-released it,
presumably because this disk's purely
structural protection was broken by the
latest bit copy program in the interim.

                   ~

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
T00,S03 RWTS ACCEPTS $D4 OR $D5 FOR THE
FIRST ADDRESS PROLOGUE NIBBLE.
T00,S03 RWTS ACCEPTS $DE OR A TIMING BIT
FOR THE FIRST ADDRESS EPILOGUE NIBBLE.
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. 1030
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