--------Math for Everyday Living-------
A 4am crack                  2015-09-30
---------------------------------------

Name: Math for Everyday Living
Genre: educational
Year: 1982
Publisher: Educational Activities, Inc.
Media: two single-sided 5.25-inch discs
OS: DOS 3.3
Previous cracks: none
Identical cracks:
  #461 Geometry Alive! Fundamentals of
       Geometry

Both disks are bootable. I'll start
with disk 1.

                   ~

               Chapter 0
 In Which Various Automated Tools Fail
          In Interesting Ways


COPYA
  immediate disk read error

Locksmith Fast Disk Backup
  unable to read any track

EDD 4 bit copy (no sync, no count)
  works

Copy ][+ nibble editor
  modified data epilogue
  ("BF AA EB" instead of "DE AA EB")

Disk Fixer
  ["O" -> "Input/Output Control"]
    set Data Epilogue to "BF AA EB"
  all tracks readable
  T00 -> looks like a DOS 3.3 RWTS
  T11 -> DOS 3.3 disk catalog
  T01,S09 -> startup program is
    "LOADER"

Why didn't COPYA work?
  modified epilogue bytes (every track)

Why didn't Locksmith FDB work?
  modified epilogue bytes (every track)

EDD worked. What does that tell us?
  no half or quarter tracks
  almost certainly no nibble check
  (just structural changes to epilogue)

Next steps:

  1. capture RWTS with AUTOTRACE
  2. convert disk to standard format
     with Advanced Demuffin
  3. patch RWTS to read standard format

                   ~

               Chapter 1
In Which We Attempt To Use The Original
    Disk As A Weapon Against Itself


[S6,D1=original disk]
[S6,D2=blank disk]
[S5,D1=my work disk]

]PR#5
CAPTURING BOOT0
...reboots slot 6...
...reboots slot 5...
SAVING BOOT0
CAPTURING BOOT1
...reboots slot 6...
...reboots slot 5...
SAVING BOOT1
SAVING RWTS

]BRUN ADVANCED DEMUFFIN 1.5

["5" to switch to slot 5]

["R" to load a new RWTS module]
  --> At $B8, load "RWTS" from drive 1

["6" to switch to slot 6]

["C" to convert disk]

                 --v--

ADVANCED DEMUFFIN 1.5    (C) 1983, 2014
ORIGINAL BY THE STACK    UPDATES BY 4AM
=======PRESS ANY KEY TO CONTINUE=======
TRK:...................................
+.5:
    0123456789ABCDEF0123456789ABCDEF012
SC0:...................................
SC1:...................................
SC2:...................................
SC3:...................................
SC4:...................................
SC5:...................................
SC6:...................................
SC7:...................................
SC8:...................................
SC9:...................................
SCA:...................................
SCB:...................................
SCC:...................................
SCD:...................................
SCE:...................................
SCF:...................................
=======================================
16SC $00,$00-$22,$0F BY1.0 S6,D1->S6,D2

                 --^--

]PR#5
...
]CATALOG,S6,D2

C1983 DSR^C#254
086 FREE

 A 003 LOADER
 B 006 SHP.BIN
 B 002 PRT.BIN
 B 002 SOUND.BIN
 B 004 SCR.BIN
 B 034 MENU.BIN
 B 002 PRT.PIC.BIN
 B 002 SOUND.IT
 A 043 MATH.1
 A 044 MATH.2
 A 055 MATH.3
 A 038 MATH.4
 A 056 MATH.5
 B 005 TOL
 B 034 DOLLAR.BIN
 A 030 MENU
 T 003 STUDFILE
 A 007 WRITE DISK
 A 003 LOGO

]RUN LOADER
...works...

[S6,D1=demuffin'd copy]

]PR#6
...grinds...

My copy can't read itself yet. This is
not unusual.

                   ~

               Chapter 2
 In Which We Remove All Traces Of Copy
Protection Using An Automated Tool That
   I Wrote For Just Such An Occasion


[S6,D1=demuffin'd copy]
[S5,D1=my work disk]

]PR#5
]BRUN PDP

T00,S03,$35 change BF to DE
T00,S02,$9E change BF to DE

Quod erat liberandum.

Disk 2 has identical protection.

                   ~

               Epilogue


Entering a first name of "SCORES" will
take you to an administrative screen to
show student records.

Entering a first name of "PURGE" will
allow you to purge student records.
There is no administrative password.

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A 4am crack                     No. 465
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