Unfortunately, this site has restricted functionality as this browser does not support the HTML button formaction attribute.
Unfortunately, this site has restricted functionality as this browser has HTML web storage turned off.

Copy Unprotecting King's Quest ][ Version 1.0W. by Independent (IND)

92 of 30,906 files
2 items
  • Zip / DOS   How to

Emulating KQ2UNP.COM in DOSee.

Use these tabs to make adjustments to the emulation

If the emulation is taking too long to load, you can turn it off.

Applying changes will reload the page and reboot the emulator

Changes will not be applied until this browser tab has been refreshed

DOS programs need a keyboard for user input

ENTER to select or continue
ESC to navigate back or exit
are often used to navigate menus

Emulation too slow?
Set the emulator to use maximum CPU speed
Want to hack around in the DOS prompt?
  1. Mount the DOS tools drive with automatic run program turned off
  2. Then dir u: to list the utilities, some included programs 4dos.com cp.exe acidview.exe pictview.exe
  3. Use mount to list the emulated drives
  4. Learn the DOSBox commands

DOSee pronounced dos/see, is our emulator used to run MS-DOS based software in your web browser.

MS-DOS (Microsoft DOS) was the primary operating system used by PCs during the 1980s to the early 1990s and is the precursor to Microsoft Windows.

DOSee is a slimmed down, modified port of The Emularity.

The Emularity is a multi-platform JavaScript emulator that supports the running of software for legacy computer platforms in a web browser. It is the same platform that's running emulation on the Internet Archive.

EM-DOSBox is a high-performance JavaScript port of DOSBox that is applied by The Emularity for its emulation of the MS-DOS platform.

DOSee uses BrowserFS ZipFS and ZipFS Extras to simulate zip file archives as hard disks within EM-DOSBox.

DOSBox is the most popular MS-DOS emulator in use today and is frequently used by commercial game publishers to run games from their back-catalogues on modern computers.

DOSee, built on The Emularity, EM-DOSBox and DOSBox. Capture screenshot and save function built on canvas-toBlob.js.

[+] Configuration Select all
                Copy Unprotecting King's Quest ][ Version 1.0W
                              by the Road Runner
                                 July 4, 1986

In commemoration of 100 years of the Statue of Liberty, the accompanying 
program and simple procedure will liberate your King's Quest ][ (Version 1.0W) 
from the chains of copy protection, by creating a non-protected backup. To 
create the backup, you will need: 

     .  An IBM PC, XT, AT or compatible running DOS 2.0 or greater and
         having a 360KB or 1.2M drive identified as A,
     .  The original King's Quest ][ (Version 1.0W) Diskettes 1 and 2,
     .  Two blank diskettes on which the backup will be made,
     .  Two diskette labels and two write protect tabs,
     .  The DOS program DISKCOPY (or equivalent),
     .  The accompanying program KQ2UNP.COM,
     .  These instructions.

Follow these simple steps:

     1.  Run DISKCOPY to make a backup of KQ-][ Disk 2 onto one of the blanks.  
You should have no difficulty making this copy since Disk 2 is not protected.  
Label the copy "KQ-][ Disk 2" and put a write protect tab on it.  

     2.  Using DISKCOPY, make a backup of KQ-][ Disk 1 on the other blank 
diskette.  Since it is protected, you should expect to see an "Unrecoverable 
read error on track 6" message, followed by a "Target disk may be unusable" at 
the end of the copy.  Ignore these warnings.  

(NOTE: If you do -not- get the warnings, you may not have the right version of 
KQ-][ and these procedures may not work.  Instructions for unprotecting 
earlier versions of KQ-][ can be found on several bulletin boards.) 

     3.  Run program KQ2UNP and follow its directions: 

         .  Insert the original KQ-][ Disk 1 in Drive A, then press ENTER,
         .  Remove the orginal, put the Disk 1 copy in Drive A, then press 

     4.  Remove the backup, label it "KQ-][ Disk 1" and put a write protect 
tab on it.  

You are done!!  Enjoy the freedom!!  


For those of you who would like to know how the copy protection and copy 
unprotection work, here is an overview of the details.  

Copy Protection:

Track 6 Side 0 of KQ-][ Disk 1 has been specially formatted so that it cannot 
be duplicated by most software disk copy programs.  When KQ-][ is booted, it 
eventually reads track 6 to determine that the special format is present.  
Specifically, it reads track 6 side 0 sectors 8 to 2 (backwards) as 1024 byte 
sectors, then reads sector 1 as an 8192-byte sector.  It expects to find each 
sector, and to get a CRC error on each read. If what is read is the expected 
data, it assumes you have the original KQ-][ Disk 1, and runs the game.  It 
never makes this check again during the game.  

Copy Unprotection:

The copy unprotection design takes advantage of several characteristics of the 
KQ-][ copy protection scheme.  

        1.  Most importantly, KQ-][ uses ROM BIOS INT 13 calls to read the 
copy protected sectors, hence a demon can be introduced to intercept KQ-][ 
calls and fool the progam into believing it is reading the original.  

        2.  The diskette is formatted with 9 512-byte sectors per track and 
track 6 side 1 is not used by KQ-][.  The 8192-byte sector of copy protected 
data from side 0 can be stored in 16 of the 18 standard 512-byte sectors on 
track 6 sides 0 and 1.  

Program KQ2UNP reads the boot record and copy protected data from the original 
KQ-][ Disk 1.  On the copy, it writes a Road Runner produced boot record on 
track 0, and a demon, the original boot record and copy protection data on 
track 6.  

When the KQ-][ copy is booted, the Road Runner boot record reads track 6 into 
memory, installs the demon, then gives control to the original boot record.  
The demon passes on all disk read requests to the ROM BIOS until KQ-][ asks 
for track 6 data.  It then feeds KQ-][ the copy protection garbage it expects, 
until the last read call to track 6.  The demon then uninstalls itself and 
vanishes, leaving no trace.  

Note:  This program and writeup can also be used to unprotect The Black 
       Cauldron Version 1.1J.
KQ2UNP.DOC 80x91 Font