From GameBrew

Last Updated2008/07/13

jEnesisDS is a Sega Genesis/MegaDrive emulator for the Nintendo DS, by Lordus. It is a port of a Genesis emulator written in Java and was released as an entry in the GBAX 2007 competition. It is the only Genesis emulator for the DS with sound support.

It was entered to the NEO Summer Coding Compo 2007 and ranked 3rd place.


jEnesisDS uses DLDI for accessing your cards filesystem, DLDI patch for the .nds file and add your rom disks.

User guide

You have to play a bit with the settings to make some games boot or work better.

Some games work faster with Idle Loop Detection, others without (Castlevania, Gunstar Heroes), and some games just boot if it is disabled.

The same goes for H-INT emulation. If a game doesn't boot just try changing those options.

Very few games will just boot, if checksum autofixing is disabled (Dynamite Heady, Thunder Force IV).

Note: 3MB+ games will not work due to the limitations of the emulator.

Game compatibility list

Please also see compatibility list.

MegaDrive/Genesis ROM Title Notes
16 Zhang Wa Jiang Works.
16t Works.
2020 Toshi Super Baseball Works.
3 Ninjas Kick Back Works.
688 Attack Sub Works.
Aa Harimanada Works.
Aaahh! Real Monsters Works.
Action 52 Works.
Addams Family Values Works.
Addams Family, The Black screen.
Advanced Daisenryaku - Deutsch Dengeki Sakusen Works.
Adventures of Batman & Robin Works.
Adventures of Mighty Max, the Black screen.
Adventures of Rocky and Bull Works.
Adventurous Boy - Mao Xian X Works.
Aeon Blasters / Air Buster Works.
Aero the Acro-Bat Works.
Aero the Acro-Bat 2 Works, glitchy intro.
Aerobiz Works. Enable H-INIT.
Aerobiz Supersonic Works.
After Burner II Works but ground not rendered properly.
Air Diver Works.
Air Management - Oozora ni Kakeru Works.
Air Management II - Koukuuou wo Mezase Works.
Aladdin Works.
Alex Kidd in the Enchanted Castle Works.
Alien 3 Works.
Alien Soldier Not Working. Slow and unplayable.
Alien Storm Works.
Alisia Dragoon Works.
Altered Beast Works. Minor Graphical errors.
American Gladiators Works.
Andre Agassi Tennis Works.
Animaniacs Works.
Another World Works.
Aoki Ookami to Shiroki Mejika Works.
Aquatic Games Starring James Pond Works.
Arcade Classics Works.
Arch Rivals - The Arcade Game Works.
Arcus Oddyssey Works.
A Ressha de Ikou MD (Take the "A" Train) Works.
Ariel the Little Mermaid Works.
Arnold Palmer Tournament Golf Works.
Arrow Flash Works.
Another World Works.
Art Alive Works.
Art of Fighting Works.
Astrix and the Great Rescue Works. PAL-only game but runs at NTSC speed.
Astrix and the Power of the Gods Works. PAL-only game but runs at NTSC speed.
Atomic Robo-Kid Works.
Atomic Runner Works.
ATP Tour Championship Tennis Works.
Australian Rugby League Works. Crowd sound distorted.
Atomic Robo-kid Works.
Awesome Possu... Kicks Dr. Machino's Butt! Works.
Atomic Robo-kid Works.
Awong: Hero in the Sky Works.
AWS Pro Moves Soccer Works. Enable H-INIT.
Ayrton Senna's Super Monaco GP II Works.
Barver Battle Saga: Tai Kong Zhan Shi Works.
Battletoads Works.
Battletoads & Double Dragon Not working.
Beyond Oasis Works.
Bill's Tomato Game Works. Needs H-INIT set to ON.
Boogerman Works. Needs H-INIT set to ON.
Bubba n' Stix Works.
Bubble and Squeek Not working.
Bubsy Works.
Bubsy II Works. Music not working and some sound effects wrong.
Cannon Fodder Works. Set H-INIT to ON. Disable Force Update to eliminate framerate issues. PAL-only game but runs at NTSC speed. Some graphical and audio glitches.
Castlevania Bloodlines Works.
Chiki Chiki Boys Works.
Chuck Rock Works.
Chuck II: Son of Chuck Works.
Cold Shadow Works. PAL-only game but runs at NTSC speed.
Command & Conquer (beta) Not working. Brown screen after post-title splashscreen.
Comix Zone Works. Crops the Screen a bit. Some Background Flicker. Very Playable.
Contra: Hard Corps Works. Cuts off the Edges a Little.
Cool Spot Works.
Cosmic Spacehead Works.
Crusader of Centy Works.
Daze Before Christmas Works. PAL-only game but runs at NTSC speed.
Decap Attack Works.
Doraemon Works.
Dr. Robotnik's Mean Bean Machine Works. Sprites for title screen are missing.
Dragon Ball Z: Buyuu Retsuden Works. Occasional background corruption.
Dynamite Headdy Works.
Earthworm Jim Works.
Earthworm Jim 2 Works.
Ecco the Dolphin Works.
Ecco Jr. Runs near flawlessly with minor graphic errors.
Elemental Master Works.
Eternal Champions Works.
Exile Works. Minor glitches on right of screen.
Fatal Labyrinth Works.
FIFA International Soccer Works. Crowd sound is garbled but otherwise fine.
FIFA Soccer 95 Works. Crowd sound is garbled but otherwise fine.
FIFA Soccer 96 Works. Crowd and intro sound is garbled but otherwise fine.
FIFA 97: Gold Edition Works. Crowd sound is garbled but otherwise fine.
FIFA 98: Road to World Cup Works. Crowd sound is garbled but otherwise fine.
Flink Works. PAL-only game but runs at NTSC speed.
Gaiares Works.
Garfield: Caught in the Act Works.
Gargoyles Works.
Ghouls & Ghosts Works.
Gley Lancer Works.
Gods Works.
Greendog: The Beached Surfer Dude! Works. Sprite Masking must be OFF.
Gunstar Heroes Works.
Golden Axe Works.
High Seas Havoc Works.
International Superstar Soccer Deluxe Works. Set H-INIT to ON. Graphical glitches on pitch.
Izzy's Quest for the Olympic Rings Works. H-INT needs to be ON. No sound.
Joe and Mac: Caveman Ninja Works.
Kid Chameleon Works.
Langrisser 2 Works.
Landstalker Works.
Last Battle Works. Set H-INIT to ON.
Legend of Wukong Works.
Light Crusader Works. Some priority issues.
Lobo Works.
Lotus Turbo Challenge Works. Actually works perfectly without cropping.
Magical Taruruuto Kun Works.
Marsupilami Works.
Marvel Land Works. Some background flickering
McDonald's Treasure Land Adventure Works.
Mega Bomberman Works.
Mega Man: The Wily Wars Works. Use this patch actually works perfectly without cropping.
Mega Turrican Works from start to finish.
Mick and Mack Global Gladiators Works.
Michael Jackson's Moonwalker Works.
Mickey's Castle of Illusion Works.
Mickey Mania Works. Some graphical glitches. Turn H-INIT to ON to pass moose stage.
Mickey Mouse - Minnie's Magical Adventure 2 Works.
Mickey's World of Illusion Works.
Micro Machines Works. Enable H-INIT to avoid slowdown. Actually works perfectly without cropping.
Micro Machines 2 Turbo Tournament Works. Enable H-INIT to avoid slowdown.
Micro Machines Military Works. Enable H-INIT to avoid slowdown.
Micro Machines Turbo Tournament '96 Works. Enable H-INIT to avoid slowdown.
Mighty Morphin' Power Rangers: The Movie Works.
Monster World IV Works. English patch needs region set to EUR.
Mortal Kombat Works. Set H-INIT to ON.
Mortal Kombat II Works. Set H-INIT to ON.
Mr. Nutz Works. Works. PAL-only game but runs at NTSC speed. Set H-INIT to ON.
M.U.S.H.A Works.
Mystic Defender Works.
Nadia: The Secret of Blue Water Works.
NBA Live '95 Works. Menu has graphical issues, and crowd sound is garbled.
Outrun Works.
Pagemaster Works. Set H-INIT to ON.
Phantasy Star 2 Works. Set H-INIT to ON.
Phantasy Star 2 Text Adventure: Annie's Adventure Not working. Red screen after title.
Phantasy Star 3 Works. Cuts off a Small Portion of the Left Side of the Screen. Quite Playable.
Phantasy Star 4 Works. Turn Vertical Scaling Off.
Power Instinct Works.
Puggsy Not working. Crashes when entering level even when H-INIT enabled.
Pulseman Works.
Quackshot Works.
Radical Rex Works.
Ranger X Works. Set H-INIT to ON.
Ren & Stimpy: Stimpy's Invention Works.
Rent-A-Hero Works. New translation tested.
Rick Dangerous Works.
Rise of the Robots Works with minor graphical issues. Enabling 6-button pad is recommended.
Ristar Works.
Rocket Knight Adventures Works.
Road Rash Works, but road and grass are rendered incorrectly.
Road Rash II Works, but road and grass are rendered incorrectly.
Road Rash 3 Works, but road and grass are rendered incorrectly.
Rolo to the Rescue Works.
Sensible Soccer Not working. Black screen on boot.
Shining Force Works. Actually works perfectly without cropping.
Shining Force 2 Works. Actually works perfectly without cropping.
Shining in the Darkness Works. Actually works perfectly without cropping.
Shinobi 3 Works (0.6).
Snow Bros Works from start to finish.
Sonic 3D Blast: Flickies' Island (beta 73) Works. Disable Force Update to fix slowdown and do not go to JenesisDS menu. Major graphical distortion on intro and title. Minor in-game glitches but fully playable. Press A on pause menu to skip stage.
Sonic & Knuckles Works (0.6). Gameplay is perfect, minor menu glitches.
Sonic Crackers Works.
Sonic Spinball Works. Sometimes game objects appear in front of the HUD.
Sonic the Hedgehog Works.
Sonic the Hedgehog 2 Works. Graphics corrupt in 2-player mode due to strange interlaced resolution. Emerald Hill Zone and Casino Night Zone have minor foreground issues for empty tiles. Loading a save state causes missing sound channels.
Sonic the Hedgehog 2 (Simon Wai Prototype) Works. Access inaccessible stages by pressing A+Start on title screen.
Sonic the Hedgehog 3 Works (0.6), minor sound issues.
Sonic the Hedgehog 3 & Knuckles Works, but use this patch to reduce the rom size. SRAM doesn't work so save using save states.
Space Harrier II Works.
Sparkster Works.
Spider-Man & Venom: Maximum Carnage Playable although it has major graphic issues.
Spot Goes to Hollywood Works.
Starflight Works. Some graphical issues on text.
Star Odyssey Works.
Street Fighter II: Special Champion Edition Works. Actually works perfectly without cropping. Enabling 6-button pad is recommended.
Streets of Rage Works.
Streets of Rage 2 Works.
Streets of Rage 3 Works.
Strider Works.
Super Fantasy Zone Works from start to finish.
Sword of Vermillion Works.
Sylvester & Tweety Cagey Capers Works.
Tazmania Works.
The Lion King Works. Disable Force Update to fix slowdown and do not go to JenesisDS menu.
The Jungle Book Works. Some glitches in story sequences.
Thomas the Tank Engine & Friends Works.
Thunderforce IV Works. Enable H-INIT for upper part of the screen to show.
Tinhead Not working. Black screen on boot.
Tiny Toon Adventures: Buster's Hidden Treasure Works.
Toejam & Earl Works.
Toejam & Earl: Panic on Funkotron Works.
Toki / JuJu Densetsu Works.
Tougi-Ou: King Colossus Works.
Truxton / Tatsujin Works.
Trouble Shooter / Battle Mania Works.
Twinkle Tale Works.
Undead Line Works.
Valis Works.
Valis III Works.
Vectorman Works.
Vectorman 2 Works.
Virtua Racing Not working. Unemulated SVP chipset.
Warriors of the Eternal Sun Works. Party selection portraits invisible.
Warsong Works.
Wiz n' Liz Not working.
World Cup Italia '90 Works.
Wonder Boy III: Monster Lair Works.
Wonder Boy V: Monster World Not working. Hangs on title screen.
Worms Works. Actually works perfectly without cropping.
Xiao Monv: Magic Girl Works.
Ys III Works.
Zero the Kamikaze Squirrel Works.
Zero Tolerance Works. Weapon slightly layered over HUD.
Zero Tolerance 2: Beyond Zero Tolerance Works. Weapon slightly layered over HUD.
Zero Wing Works from start to finish.
Zool Not working. Crashes on SEGA logo.


6-Button Mode (PAD1):

Y - Y button

B - B button

A - C button

X - X button

L - Y button

R - Z button

Start - Start

Start+L+R - Mode

D-Pad - L/R/D/U

3-Button Mode (PAD1):

Y - A button

B - B button

A - C button

D-Pad - L/R/D/U

STart - Start

X - Center screen

L - Move screen area left (if the game has a horizontal resolution of 320 pixels)

R - Move screen area right (if the game has a horizontal resolution of 320 pixels)

Select - Enter File Browser (also accessible by the cartridge icon)


Touch the Joypad icon to enter Setting in game.

Touch save-slot icons to load/save states (2 slots available).

Touch screen to pause. While in pause mode, use the D-Pad for screen positioning in the HW renderer version.


jenesisds2.png jenesisds3.png

Known issues

With games that suffer from slowdown unless Force Update is enabled or disabled, avoid going to the jEnesisDS menu (pressing the touchscreen) it will cause the slowdown to occur again. Pause using the Start button only (examples are The Lion King, Sonic 3D beta 73, etc).



  • Changed scheduling of M68000 and Z80.
  • Some changes in M68000 internal memory handlers.
  • YM2612 FM core mostly rewritten in ASM.
  • Some bugs in FM core fixed (Operator 1 was sometimes not considered in certain cases).
  • Fixed reset bug for FM core resulting in unstable sound for every game loaded except the 1st one.
  • Raised sample rate for FM emulation from 16KHz to 28KHz (28, because a few games can't do 32KHz).
  • Sound is completely mixed in hardware now, meaning every FM channel, PSG and DAC have their own DS sound channels.


  • Fixed bug in Z80 core, preventing some games from having sound (Wonderboy, etc).
  • Fixed bug in 68000 optimization, that could make some games hang (Bonanza Brothers, etc).
  • Changed sound handling and doubled sample rate for PCM sound, resulting in slightly better sound quality.
  • HW renderer partially rewritten, many glitches should be gone, some are still there (and will probably not be easy to fix ever).
  • Sprite rendering completely rewritten in ASM. Should be faster and fix most of the sprite issues.
  • Implemented mid frame palette updates (water effects in Sonic games, Castlevania, etc). Note, that this just works, if a game is constantly fast enough, so slowdowns can still cause colors to flicker).
  • Many little optimizations in memory handling and the CPU cores. Should reduce slowdowns.
  • Added option for sprite masking (Landstalker etc). It is not 100% emulated, just faked to be enough for most games using it (disable it, if sprites are missing, that should be there).
  • Added option to change between 3- and 6-Button pad (just works, if the option is applied BEFORE loading a game). When 6-Button pad is disabled, L+R can be used to move the visible screen area, X to center it.
  • Added sound state to the savestates, so that the correct tracks should play now when a state is loaded. Savestates are still not 100% reliable and loading old states can potentially cause problems.


  • Custom Z80 ASM core implemented.
  • Custom YM2612 and PSG emulation, running on the ARM7. So there is sound now.
  • Many parts rewritten. Speed without Z80 core should be quite a bit faster for most games.
  • Idle-loop detection completely rewritten. Shouldn't break any games anymore. Therefore the option to disable it was taken out.
  • Some changes to HW renderer. Some glitches should be gone, others were probably introduced. Will be rewritten for the next version.
  • Tweaked H-Int auto detection, so less games should need the "ON" option to boot now.
  • Mode-Button added (L+R+Start).


  • Implemented save-states (touch slot icons to load/save).
  • Extended SRAM compatibility. Story of Thor and Phantasy Star IV should work now.
  • Extended "force update" of HW renderer. Fixes Sonic3 intro, Sonic Bonus stage and probably others.
  • Fixed sprites showing garbage if more than 64 sprites were displayed (Comix Zone, Outrun, Sonic, well most games probably).
  • Partial rewrite of sprite handling in the HW renderer. Less slowdowns when a lot of sprites are displayed.
  • Implemented better VSync. Fixes temporary speedups after slowdowns.
  • Implemented vertical scaling option into HW renderer (horizontal is NOT possible, dont ask). Aspect ratio will be incorrect, but makes games more enjoyable.
  • Implemented screen positioning in HW renderer (touch screen to pause, then use [D-Pad] to scroll. Push [A] for faster scrolling).
  • Rewrote DS interrupt system for HW renderer. Probably less slowdowns, surely safer.
  • Added "Fake Z80" option. The faking code can mess up some games (Ghouls n' Ghosts, Aladdin, Cool Spot 2, and others), so it can be turned off now.
    • Interestingly enough, if it is turned off, real Z80 emulation will be executed, BUT just undercertain circumstances, to keep games working and not to slow things down.
    • As with other options, some games might depend on a certain setting to boot (Gaiares just boots when this option is set to "off").


  • Updated Release.
  • Recompiled with current cpu core. v0.4 was "accidentially" compiled with an older version.

This should raise compatibility quite a bit.

  • Separated HW and SW renderer versions.
  • Activated "Force Update" Option in the HW renderer version. If enabled, the chances of tile corruptions are minimized - it can lead to massive slowdowns though, if a game updates more than 1024 unique tiles per frame (Turrican intro, Comix Zone intro).
  • You can also temporarily change this option for a one-time update, if the tiles are corrupted(i.e Viewpoint).


  • Initial Preview Release.
  • Custom ARM asm Motorola68000 CPU core.
  • Hardware and Software renderer (this release defaults to the HW renderer and the SW renderer can not yet been choosen through the settings.
  • VDP emulation with all DMA modes.
  • Horizontal & Vertical Interrupts.
  • Support for PAL/NTSC and all country codes (all games will run at 60Hz though).
  • .smd, .bin & .gen support.
  • partial SRAM save/load support (doesnt work for all games yet).
  • Line based renderer.
  • Scroll Layers A+B & Window rendering with priorities (horizontal Windows arenot emulated in theHW renderer yet).


Exophase, Stéphane Dallongeville ,Charles McDonald, SiLeNt_Ni.

Anyone else who supported this project in one or another way.

External links