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    Import Games FAQ by TWilson

    Version: 0.93 | Updated: 03/11/01 | Search Guide | Bookmark Guide

    Sega Genesis/Sega CD Import FAQ, v0.93
    Copyright (C) 2001 Trevor Wilson (wilsontr@uvsc.edu)
    aka jiji (jiji@shmups.com)
    [insert elite ascii art here]
    Latest version always available at 
    I.   Legal stuff
    II.  History
    III. Why?
    IV.  What's missing?
    V.   Genesis
      A. Can I play Megadrive games on my Genesis?
        1. Genesis 1/Genesis 2
        2. Nomad/Genesis 3
        3. Will PAL games play on an NTSC Genesis?
        4. Does the 32X have any sort of lockout?  Will Jpn/PAL/US games work
        with any 32X hardware?
      B. What's this I hear about territory lockout?
        1. What games have territory lockout?
        2. How can I get past the territory lockout?
      C. Are there convertor cartridges available?
        1. Game Genie
          a. What are some Game Genie codes one can use to play import games?
        2. Honey Bee
        3. Mega Key/Super Key
        4. Pro Action Replay
          a. What are some PAR codes one can use to play import games?
        5. Datel Universal Adaptor
      D. Can I modify my Genesis to play import games?
         1.  Can I add a territory switch and/or 50Hz/60Hz switch to my
             Genesis/Mega Drive 1?
         2.  Can I add a 50Hz/60Hz switch to my Genesis/Mega Drive 2?
    VI   Sega CD
      A. Is it possible to play foreign CDs on my Sega CD/Mega CD?
    VII. Third-party Genesis/Sega CD consoles
      A. JVC X'Eye/Wondermega
      B. Pioneer LaserActive
    VIII. Appendix
      A. Who made these Game Genie codes?  And how?
    IX. Thanks
    I.   Legal stuff
      This document may be reprinted in its entirety without the author's
      permission.  However, if material is taken from the document, credit must
      be given to myself (and I'd like it if you emailed me first, too).
    II.  History
      03/11/2001: v0.93
          - Added Game Genie/PAR codes for Bare Knuckle III.
          - Reduced the number of codes for Thunder Force IV, so they'll actually
            work on a real Game Genie.
      02/25/2001: v0.92
          - Added information on the JVC X'Eye and Pioneer LaserActive.  
            Thanks to The Scribe.
      02/23/2001: v0.91
          - Fixed the title of Yuu Yuu Hakusho Makyou Toitsusen.
          - Added information on playing imports on the 32X
          - Added information on switching a Genesis 2 for 50Hz/60Hz and for 
            territory (thanks Mike G!)
      02/23/2001: v0.9
          - First release, preliminary version.
    III. Why?
      While deciding whether to try to import the European or Japanese version
      of Alien Soldier a few months ago, I became rather confused as to whether I
      could play it on my US Genesis with just a regular passthrough cartridge
      and about what kind lockout it might have.  I searched around for information
      on this subject, but details were sketchy and answers on Usenet were vague.
      I decided to try to collect all known information on the subject into a
      single source so that others wouldn't be confused the same way I was.
    IV.  What's missing?
      - This document is probably riddled with inaccuracies, so if you see any,
        let me know and I'll clean them up.
      - The only set of Game Genie codes I've been able to test on an actual
        Genesis with an actual Game Genie and an actual game cartridge is the
        one for Monster World IV.  The rest were tested on DGen with the good ROM
        dumps of the games.  I can't see any reason why the rest of them
        wouldn't work on a real Genesis, but if you try them out, let me know what
        results you get.
      - The list of games with software territory lockouts is by no means
        complete.  Information on any additional games would be much appreciated.
      - I know for a fact that there are more convertor cartridges out there
        than what I have listed, I just didn't have enough information on them 
        to list them.
    V.  Genesis
      Can I play Japanese Megadrive games on my Genesis?
         Yes, with a few provisions.  Take note:  Some Japanese and European
         games have a software lockout in place that affects every US version of
         the console (yes, including the Genesis 3), described in full below.
         Genesis 1/Genesis 2/CDX
         The cartridge slot on the Genesis 1, 2, and CDX is different from that
         of the Japanese Megadrive.  Japanese cartridges are rounded on the ends,
         so you won't be able to get a Japanese cartridge to fit into the
         slotted and narrower cart slot on a Genesis 1/2/CDX.  This can be
         taken care of by either using a passthrough cartridge (see below) or
         removing the tabs in your system's cartridge slot (not really recommended,
         but hey, it's your choice).
         Nomad/Genesis 3
         The cartridge slot on the Genesis 3 is wide and spacious, and leaves
         plenty of room for the extra plastic on the sides of Japanese
         cartridges.  Japanese carts will fit without any trouble.  
         On the Nomad, there is enough room for Japanese carts, but it's a
         tight fit and it may prove a bit difficult getting games in and out
         smoothly, with the ridges on the Japanese carts.
         Will PAL games play on an NTSC Genesis?
         Yes, unless they have the 50/60hz lockout or territory lockout (see
         below) in place.  Many PAL versions of games are no different from their
         US counterparts, which is why they play at a slower speed and with black
         bars at the top and bottom of the screen on European consoles.  These
         games will play without trouble on US consoles.  Other games (of which the
         European version of Alien Soldier is one) have been adapted to the PAL
         format, and thus will run too fast on US consoles (about 70hz).
         Does the 32X have any sort of lockout?  Will Jpn/PAL/US games work
         with any 32X hardware?
         From the rec.games.video.* FAQ:
           SEGA 32X: No new incompatibility, but the incompatibility of the 
           underlying Genesis/Mega Drive (and CD player, if you're playing 32X
           CD games) still applies; get a language switch and/or a Pro-CDX, just
           like for regular Mega Drive and Mega CD games.
      What's this I hear about a territory lockout?
         For most of the Genesis's life, cartridges were produced without any
         sort of territory protection.  Some games even had multiple languages for
         different territories, Neo Geo-style.  However, later in the Genesis's
         life, Sega and several third-party developers decided to start
         implementing a software territory lockout to keep people from playing
         games outside of the territory they were intended for.  The software
         routine is different in each game and always resides in a different
         part of the program code. Basically what the routine does is to check the
         hardware address in RAM that specifies what kind of Genesis the game
         is running on (Japanese, US, European, etc), and if that doesn't match
         the intended territory, the game locks up with an error message.
         How can I get past it?
         There are several different means available.  By far the most readily
         available (and least expensive) is to use a Game Genie with the proper
         codes for that game to bypass the protection directly.  Another is to
         obtain a Mega Key, Super Key, Pro Action Replay, or Datel Universal
         Convertor to bypass the protection (more on these below).  A more
         drastic step would be to install a territory switch in your system so that
         you can simply switch your system to the necessary territory.
         What games have it?
         From the rec.games.video FAQ, plus some additions:
             Do not run in English mode: Japanese versions of After Burner II,
               Akumajou Dracula Vampire Killer, Alien Soldier, Bare Knuckle 3, 
               Chameleon Kid, Contra: The Hard Corps, Doraemon, Gunstar Heroes, 
               Monster World 4, Pulseman, Ragnacenti, Rolling Thunder II, Super 
               Monaco GP 2, Super SF2, Thunder Force IV, Virtua Racing, Yuu Yuu 
               Hakusho Makyou Toitsusen.
             Do not run in Japanese mode: US versions of Aladdin, Bio-Hazard
               Battle, Castlevania Bloodlines, Cyborg Justice, Dragon's Fury, 
               Eternal Champions, FIFA Soccer '97 Gold Edition, Flashback, 
               Gauntlet IV, Gunstar Heroes, Landstalker, Lightening Force,
               Mazin Saga, Outrun 2019, Phantasy Star IV, Ren and Stimpy, Rocket
               Knight Adventures, SF2CE, Shadowrun, Shining Force, Shinobi 3,
               Streets of Rage II, Streets of Rage III, Subterrania, Sunset Riders,
               Thunderstrike (CD), World of Illusion, X-Men.
             Do not run in 50 hertz mode: US versions of Flashback, Sonic
               Spinball, Streets of Rage II, World of Illusion, World Series
               Baseball (And probably most of the ones that don't run in Japanese
               mode, too.)
             Does not run in 60 hertz mode: European version of Xenon2.
      Are there convertor cartridges available?
        Yes, there are several passthrough cartridges available that will allow
        you to play import games on you Genesis.
        Game Genie
        This is by far the easiest  and cheapest of the convertor cartridges to
        come by.  Originally intended as a cheat device for games, it intercepts
        requests to certain locations in the ROM data of the cartridge and
        replaces the actual data with bytes entered by the user.  It accepts hex
        addresses encoded into eight-character alphanumeric codes.  By itself and
        without entering any codes it acts as a great adaptor for the differently-
        shaped Japanese Megadrive cartridges.  By entering certain codes, the
        territory lockout in certain games can be bypassed, allowing you to play
        these games on your US Genesis.  NOTE:  The Genesis 3 will not work at all
        with the Game Genie.
           What are some Game Genie codes I can use to play import games?
           Alien Soldier (EUR/JPN PAL, A version)
           Alien Soldier (JPN NTSC, B version)
           Bare Knuckle III
           Contra: The Hard Corps (JPN)
           Golden Axe III
           Monster World IV
           Rockman Megaworld (Mega Man: The Wily Wars JPN)
           Thunder Force IV
           Yuu Yuu Hakusho Makyou Toitsusen (yes, the Treasure one)
       Honey Bee
       Not much is known about this particular device, but it's assumed that it
       is merely a passthrough cartridge meant only to overcome the physical
       difference in cart shape.
       Mega Key/Super Key
       Both of these devices are passthrough cartridges that have several DIP
       switches that allow the user to select the country and/or video format
       that the game detects upon bootup.  The Mega Key only has switches for
       country selection, while the Super Key has the addition of a PAL/NTSC switch
       for games that have a lockout based on the video format.  Setting the
       country switch to Japan, for example, would make a Japanese game with
       territory lockout think it's being run on a Japanese system and therefore
       Datel Action Replay
       From Galen Tatsuo Komatsu:
         "Action Replay:  this is basically a Game Genie type device allowing up
          to (I think) 4 codes to be entered."
       Datel Pro Action Replay (PAR)
       This is a device similar to the Game Genie, with the addition of being
       able to modify data in RAM, as well as intercepting requests to the
       cartridge ROM.  Without entering any codes, it works as an excellent
       passthrough device for games, but like the Game Genie, with certain codes
       the territory lockout in certain games can be bypassed.
       From Galen Tatsuo Komatsu:
         "In addition to the above, it also includes the "trainer" to generate your 
          own codes."
          What are some PAR codes I can use to play import games?
            Alien Soldier (EUR/JPN PAL, A version)
            Alien Soldier (JPN NTSC, B version)
            Bare Knuckle III
            Contra: The Hard Corps (JPN)
            Golden Axe III
            Monster World IV
            Rockman Megaworld (Mega Man: The Wily Wars JPN)
            Thunder Force IV
            Yuu Yuu Hakusho Makyou Toitsusen (yes, the Treasure one)
      Datel Pro Action Replay 2
      From Galen Tatsuo Komatsu:
        "Pro Action Replay 2: taking further steps, this allows up to 100 codes
        to be entered, has a built in library of codes for most games
        available at the time, and some other functions, the most notable of
        which bypasses territorial lockouts.  The PAR2 has incompatability
        problems with the Sega CDX.  It appears to start up fine, but the
        controller doesn't respond."
      Datel Universal Adaptor
      [information forthcoming]
      Can I modify my Genesis to play import games?
       Yes, but the procedure varies for the different Genesis/Mega Drive
       Can I add a territory switch and/or 50Hz/60Hz switch to my Genesis/Mega
       Drive 1?
          Yes.  From the Sega Programming FAQ:
          How to make a language switch (Genesis/MD).
          On a Genesis/MD, there are jumpers labelled JP1, JP2, JP4,
          and JP3.  The Genesis has a capacitor on JP1 and a trace on
          JP2; the Mega Drive has a capacitor on JP2 and a trace on
          JP1.  The bottom ends of JP1 and JP2 are connected together.
          So if you cut the trace and the top end of the capacitor, and
          install a DPDT switch between them which reconnects them
          either unchanged or swapped left to right, you have a
          language switch. You'll need some wire, a soldering iron,
          solder, and a DPDT switch.
          Some machines have an open circuit instead of the capacitor.
          Also, I've been told that even if there is a capacitor, you
          can throw it out and leave an open circuit. Either way, the
          switch is a lot simpler, requiring a SPDT switch and less
          wire and solder.
          Several people have told me that you could just cut both JP1
          and JP2 and put a SPST switch on JP1. This is even simpler,
          but I'm not sure it really works, as opposed to putting your
          machine in an intermediate state that only sort-of works.
          The redesigned Genesis 2 machines don't appear to have either
          the capacitor or circuit. Nobody yet knows how to make the
          language switch for one, though there are language switch
          cartridges you can buy to act as one.
          IF YOUR MACHINE HAS NO CAPACITOR (or if you want to cross
          your fingers and throw away your capacitor) and is not a
          Genesis 2:
          Cut JP2.  The trace might be covered with paint and hard to
          see.  (If you started with a Mega Drive, JP2 is open and you
          have to cut JP1 instead.) If you aren't sure which end I mean
          by "bottom", just check the back of the board to see which
          end is connected together.
          Original state of machine:             After cutting:
           JP2 top     JP1 top              JP2 top     JP1 top
              |           |                    |           |
              |           |                    |           |
              |           |                    |           |
               \         /                      \         /
                \_______/                        \_______/
              bottom of both                   bottom of both
          Add a SPDT switch which can be in one of two positions:
            ._ _ _ _ _ _ _ _ _ _ _ _
                 .                        .
                .           . _ _ _ _ _ _ _ _ _ _
               .           .                .    .
           JP2 top     JP1 top               .    .
              |           |                  .    .
              |           |                 _________
                    | o   o |
                    | \     |
                    |  \    |
              |           |                     .
               \         /                      .
                \_______/ - - - - - - - - - - - -
              bottom of both
            ._ _ _ _ _ _ _ _ _ _ _ _
                 .                        .
                .           . _ _ _ _ _ _ _ _ _ _
               .           .                .    .
           JP2 top     JP1 top               .    .
              |           |                  .    .
              |           |                 _________
                    | o   o |
                    |     / |
                    |    /  |
              |           |                     .
               \         /                      .
                \_______/ - - - - - - - - - - - -
              bottom of both
          Cut both sides.  (Note: if you started with a Japanese Mega
          Drive the capacitor will be on the side labelled X instead)
          Original state of machine:             After cutting:
           JP2 top     JP1 top              JP2 top     JP1 top
              |           |                    |           |
              |           |                    |           |
              |           |
              |           |
              |           |                    |
            X |          ###                 X |          ###
              |          ###                   |          ###
              |          ###                   |          ###
               \         /                      \         /
                \_______/                        \_______/
              bottom of both
          add switch which can be in one of two positions:
           JP2 top     JP1 top
          (Connect 2 to 2
              |           |
          and 1 to 1)
              |           |
              2           1                   2  1  1  2
               _ _ _ _ _ _ _ _ _ _          | o  o  o  o |
              |                   `         |  \  \      |
            X |          ###`      `        |   \  \     |
              |          ### `      `       \____o__o____/
              |          ###  `      `           '  '
               \         /     `      `- - - - -'  '
                \_______/       ` _ _ _ _ _ _ _ _ '
              bottom of both
           JP2 top     JP1 top
          (Connect 2 to 2
              |           |
          and 1 to 1)
              |           |
              2           1                   2  1  1  2
               _ _ _ _ _ _ _ _ _ _          | o  o  o  o |
              |                   `         |      /  /  |
            X |          ###`      `        |     /  /   |
              |          ### `      `       \____o__o____/
              |          ###  `      `           '  '
               \         /     `      `- - - - -'  '
                \_______/       ` _ _ _ _ _ _ _ _ '
              bottom of both
          50/60 hertz switch.
          You can build a 50/60 hertz switch on a Genesis/Mega Drive
          like a language switch, but using jumpers JP3 and JP4.  The
          standard setting is 50 in PAL areas such as Europe, and 60 in
          NTSC areas like the US and Japan. In the 60 hertz mode, the
          game is faster and the screen taller; however, not all TVs
          and monitors in Europe can display this mode.
          Some American/Japanese games are protected to keep Europeans
          from playing them; this protection checks the 50/60 hertz
          setting.  You can usually get around it by installing the
          switch and switching when starting the game, then switching
          back afterwards.
          Many European games are simple ports of American or Japanese
          games and are not redesigned for 50 hertz, so work faster and
          with "better" screen proportions if played at 60 hertz.
          Genesis/Mega Drive dual version (language switch) list:
          *Battle Mania 2: The game plays in both positions. However
          with both controlers removed, a system info screen appears
          which informs about system version, langauge mode.
          Bonanza Brothers: Game plays in Japanese.  (Maybe. There
          seems to be more than one version floating around.)
          Columns: Game plays in Japanese.
          *Cyberball: Japanese version has a modem option.
          Dragon's Fury: Works only with language set to English.
          The original, Devil's Crush MD, works either way.
          Dynamite Duke: Harder on the Mega Drive.
          Elemental Master: Harder on the Mega Drive.
          Fatal Labyrinth: Game plays in Japanese.
          Fire Shark: Different title screen with Kanji.
          Flicky: Characters have Japanese names and instructions
          are in Japanese.
          Forgotten Worlds: Game plays in Japanese.
          Gaiares: only mentions the Japanese licensee on the title
          screen, and has Japanese text; you can also select
          Japanese text from the option screen.
          Ghostbusters: Game plays in Japanese.
          Ghouls and Ghosts: Different title screen with Kanji.  To
          see it on a Genesis, select the last music and sound (26
          and 56) from the options screen, then press lower left;
          A, B, or C; and Start all at the same time.  (I never
          tried this, but Gamepro magazine claimed it works.) The
          game shows some other Japanese text, and when you die
          during a boss you start out earlier.
          Insector X: Title screen refers to company as Hot-B, not
          Sage's Creation. The MD version shoots more slowly. The
          ending text is still English.
          *Marvel Land: The Japanese version says "for Mega Drive"
          or "for Genesis" but the language stays Japanese. (What
          does an English version do?)
          Monaco GP: Game plays in Japanese (also an option on the
          option screen).
          Mystic Defender: This game is actually the anime-based
          Kujaku-Ou (Peacock King) 2 game. In Japanese mode, the
          opening text is replaced by a graphics screen (never
          seen in the US version) with Japanese.  The levels have
          names, the main character wears a white robe, the
          lightning magic effect is different, and the character
          is named Kujaku in the ending (which is still English).
          Outrun: The attract mode lacks sound, the startup screen
          says "push" (not "press") start button, and "(C) Sega
          1986, 1991" is printed in reverse order. The default
          options are KM/H and a different button selection (but
          can still be changed on the option screen).
          Quackshot: Game plays in Japanese.
          Raiden Trad: The "licensed to Sega" line is absent on
          both title screens, and the second title screen includes
          only the Japanese part instead of the non-Japanese part
          of the first one.
          Revenge of Shinobi: Title changes to Super Shinobi;
          credits show at the end.
          Rolling Thunder II: The Japanese version only works on a
          Japanese setting. The US version works either way (and
          isn't bilingual).
          Sonic the Hedgehog II: Tails is renamed to "Miles".
          Streets of Rage: Title screen changes to Bare Knuckle,
          and all text is in Japanese, including the introduction.
          The clock resets when you encounter the bosses.
          Streets of Rage II: Turns to Bare Knuckle II, and renames
          Skate to Sammy --_if_ you change the setting sometime
          after turning the machine on (to skip the lockout).
          Thunder Force II: Title screen has "MD" on it, and
          company name is "Tecnosoft".
          Thunder Force III: company's name is spelled "Tecnosoft".
          *Thunder Storm FX (CD): Turns to Cobra Command in US mode.
          Truxton: Japanese title is Tatsujin.
          Twin Hawk: Different title screen with Kanji.
          *Wrestle War: The wrestler is blond on a Genesis and
          black-haired on a MD.
          * Information from testing a Japanese game
       Can I add a territory switch and/or 50Hz/60Hz switch to my Genesis/Mega
       Drive 2?
          Yes, although the territory switch will be a bit more difficult than
          with the Genesis 1.  
          A document (with pictures that can't be duplicated here) on modifying 
          your Genesis 2 to add a 50Hz/60Hz switch is available at Sega Xtreme:
          A document (with yet more pretty pictures) on adding a territory
          switch to a Genesis 2 is available on Mike Gordon's site:
    VI. Sega CD
    From the Sega CD FAQ by Barry Cantin:
         Q:  Is it possible to play foreign CDs on my Sega CD/Mega CD?
         A:  Yes, but...
      If you insert a foreign CD into your Sega CD (remember, there are three
      nationalities of Sega CDs here: European, Japanese, and U.S.), you will
      not be able to load it.  The reason for this is that a "nationality"
      lockout code is on each Sega CD and Mega CD unit.  This assures
      (without outside help) that a particular CD will only be playable on
      its particular system.
         There is a way around this lock-out code.  There are cartridges
      available that plug directly into the Genesis slot that allow foreign
      CDs to be used by any system.
      [The Lockout Chip]
      The Sega CD unit had a specially designed BIOS chip/security program
      that prevented the unit from reading CD games intended for other
      markets (US, Japanese, European), such as Japanese or European CDs on a
      U.S. machine, and vice-versa.  This Lockout chip or BIOS information
      instructed the CD unit to read the CD and look for a certain
      file/security identifier that indicated that the CD was authorized for
      use on the system.
      To work around this, the folks at Datel designed the Pro CD-X and
      Pro CD-X Plus.
      Pro CD-X (and Pro CD-X Plus)
      This is a special cartridge that plugs into the Genesis in the cart
      slot and overrides the security commands of the Sega CD.  This allows
      you to  play any Sega CD or Mega CD title on any Sega CD or Mega CD
      system of a different origin.  However, it wasn't 100% effective - not
      all games were compatible with this unit, making its appeal very
      During Sega's redesign of the Genesis and CD system, they improved the
      Bios to prevent this cartridge from working.
         This cartridge looks like a regular Genesis cartridge and has better
         success with compatibility than its predecessors.  When the Sega CD
         is powered up with this cart in place, it's possible to run the
         Sega CD via the options screen (select "CD-ROM").  The reset
         button does NOT open the Sega CD tray (first model), you have to
         do that via the options screen as well.
      CD+PLUS does not work with the 32X installed.
         Japanese CDs known to work successfully with CD+PLUS:
           F-1 Circus CD
           Final Fight CD
           Heavenly Symphony
           Prince of Persia
           Sega Classics Arcade Collection (4-in-1)
           Silky Lip
           Sol Feace
           Super League CD
           Thunder Storm
         Known NOT to work with CD+PLUS:
           Black Hole Assault
           Heavy Nova
         Known NOT to work with Pro CD-X:
           Ranma 1/2
      Secondary security lockout Bypass -
         This is the option to using one of the above carts.  It is possible
         to build your own switch onto the back of the Sega CD.  It requires
         rewiring two transistors, indicating US or Japan (no idea how
         European Sega CDs would work with this).  No details are available
         in this FAQ.
    VII. Third-party Genesis/Sega CD consoles
       JVC X'Eye/Wondermega
       From The Scribe:
        "- Both of JVC's consoles have rectangular cartridge ports with NO
           tabs. No adaptor is needed to fit Jap/Euro MegaDrive carts - they work
           as described in the FAQ. For example, I tried four different well-
           known Jap carts (the only ones I had) - Nadia no Fushugi no Umi, Madoh
           Monogatari, Jantei Monogatari, and Phantasy Star MD - and all four ran
           on my X'Eye with nary a hitch. I also ran the PAL version of Barkley:
           Shut Up and Jam with no problem.
         - There is a country protection cart port hack for the JVC X'Eye by
           Flavio that I posted here a while back. Dunno if it works, though. I
           don't have any hardware hack for the Sega CD side of the system.
         - Both of JVC's consoles have their own unique BIOS which does not
           work with any of the Sega CD converter carts, or so I'm told. They
           won't work with the Datel Action Replay Pro CD-X, that's for sure - it
           says that the system's BIOS version isn't supported."
       Pioneer LaserActive
       From The Scribe: 
        "- Pioneer's MegaDrive module is J/NTSC. Its cart port is square, like the
           WonderMega - NO tabs. When installed, the system functions exactly as a
           combination Japanese MegaDrive/Mega CD would under similar
           circumstances. I have actually had hands-on experience with a unit
           configured like this and was throwing older U.S. Genesis carts in and
           out of the cart port without any apparent problem."
    VIII.  Appendix
      Who made these Game Genie codes?  And how?
        I did.  I can't take credit for originally hacking the territory
        protection out of the games; that goes to the dumpers/hackers/scenesters
        originally responsible for dumping and hacking these games way back when
        (Jarre and TSD are among them).  What I did was to compare the correct
        ROM dumps of the games with the protection in place with the dumps of
        the hacked versions, find where the program code was changed to bypass
        the protection, and convert the hex addresses of these modifications
        into Game Genie codes.  In the process I gained some understanding of
        how the protection was implemented by the programmers of these games,
        knowledge I plan to use to find codes for games that have not yet been
        hacked to my knowledge, such as Super Street Fighter II JPN, Gunstar
        Heroes JPN, Mega Man: The Wily Wars EUR, Vampire Killer, and so on.
    IX. Thanks
       Major mad props go out to:
         Ken Arromdee (arromdee@rahul.net), for the rec.games.video.* FAQ.
         Barry Cantin (bcantin@aol.com), for his excellent Sega Genesis and
           Sega CD FAQs.
         Stéphane Dallongeville (stef_d@caramail.com), for Gens,
         Dave (dave@dtmnt.com), for DGen, http://www.dtmnt.com/
         Jarre, TSD, and all the other hackers whose ASM mods bypassed
           territory  protection on many Megadrive games.
         Galen Tatsuo Komatsu (gkomatsu@uhunix5.its.hawaii.edu), for corrections 
           and additions on the Datel cartridges
         Merlyn LeRoy (merlyn@digibd.com), for figuring out the Genesis Game
           Genie code format.
         Motorola, for the entire 68000 series of processors and their
           excellent MC68000 manual.
         The Scribe, for information on the X'Eye and LaserActive
         Sega, for making such an awesome console.
         Bart Trzynadlowski (trzy@powernet.net), for GROM.

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