Sega Genesis emulators

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Sega Genesis / Mega Drive
RS39200 Megadrive.png
Sega-Genesis-Mk2-6button.jpg
Sega-Nomad-Front.jpg
Top: PAL Sega Mega Drive.
Middle: Sega Genesis Model 2 with 6-button controller.
Bottom: Sega Genesis Nomad, portable variation.
Developer Sega
Type Home video game console, Handheld game console
Generation Fourth generation
Release date 1988 (Mega Drive)
1995 (Nomad)
Discontinued 1998 (Mega Drive)
1999 (Nomad)
Predecessor Mark III / Master System, Game Gear
Successor Jupiter / Saturn / Pluto, Visual Memory System / Visual Memory Unit
Emulated
For other emulators that run on the Sega Mega Drive/Genesis hardware, see Emulators on Mega Drive.

The Sega Genesis (Mega Drive outside North America) is a 16-bit, fourth-generation console released by Sega in Japan on October 29, 1988 and in the US on August 14, 1989, where it retailed for $189.99. It had a Motorola 68000 CPU at 7.6 MHz and a Zilog Z80 at 3.58 MHz. It had several add-ons, including the Sega CD (a CD add-on, called the Mega CD outside America) and the 32X (a 32-bit, cartridge-based add-on).

The Sega CD was released on October 15, 1992, and retailed for $299.99 and had a Motorola 68000 CPU at 12.5 MHz and 64 kbit of RAM. The Sega 32X was released on November 21, 1994 for $159.99. It had 2 SH-2 RISC CPUs at 23 MHz with 256KB of RAM and 256KB of VRAM.

Genesis/Mega Drive emulation is very good, with a high degree of game compatibility (many of them claim nearly 100% compatibility with commercial games, including Virtua Racing). They are available on many platforms. Many Genesis/Mega Drive emulators also feature compatibility with the Sega Master System (SMS), and the Game Gear (GG) as well as earlier Sega consoles. However, Genesis/Mega Drive-based arcade boards and the Sega Pico are still sketchy.

Emulators[edit]

PC / x86[edit]

Name Platform(s) Latest version Hardware features
and accessories
Hardware
variations
Enhancements FLOSS Active Recommended
BlastEm Windows Linux macOS Nightly builds
libretro core
0.6.2
~ ~
Genesis Plus GX Windows Linux macOS FreeBSD Web libretro core
Cyclone libretro core
~ ~ ~ NC
ares Windows Linux macOS git Artifacts
v135
~ ~
PicoDrive Windows Linux macOS FreeBSD Web libretro core
1.93
~ ~ ~ NC
BizHawk Windows Linux Dev builds
2.9.1
~ ~ ~ ~
MAME Windows Linux macOS FreeBSD git artifacts[N 1]
0.262
libretro core
~ ~ ~
Kega Fusion Windows Linux macOS 3.64 ~ ~ ~ ~
Mednafen Windows Linux macOS FreeBSD 1.32.0-UNSTABLE ? ~*
Exodus Windows 2.1 ?
GENS
Gens GS/II
Windows Linux macOS FreeBSD BeOS r7 (Gens/GS)
git (Gens/GS II)
2.14
~[N 2] ~*
higan (火眼)
byuu (謬/view)
Windows Linux macOS FreeBSD v110 ~ ? [N 3]
FinalBurn Neo Windows Linux macOS Stable
WIP builds
libretro core
~ ~ NC
DGen Windows Linux macOS FreeBSD 1.33
Genecyst MS-DOS x.xx
KGen/KGen98 MS-DOS 034b
9804
Megado Windows Linux git ?
Regen Windows Linux 0.972 ?
Nuked-MD Windows Linux 1.2
jgenesis Windows Linux git TBD
clownmdemu Windows 0.5.2 ? TBD

Mobile / ARM[edit]

Name Platform(s) Latest version Hardware features
and accessories
Hardware
variations
Enhancements FLOSS Active Recommended
Genesis Plus GX Android iOS Linux Pandora libretro core ~ ~ NC
MD.emu Android Dragonbox Pyra 1.5.77 (Android)
1.5.46.02 Pyra
~ ?
PicoDrive Android Pandora Gizmondo GP2X Wiz
GP2X
1.93 libretro core ~ ~ ~ NC*
FinalBurn Neo Android iOS libretro core ~ ~ ~ NC

Consoles[edit]

Name Platform(s) Latest version Hardware features
and accessories
Hardware
variations
Enhancements FLOSS Active Recommended
Nintendo Switch Online (m2engage) Switch N/A
Sega 3D Classics
(Gigadrive)
Nintendo 3DS N/A ~*
NeoGenesis Xbox V25 ~ ?
Genesis Plus GX Xbox Xbox 360
GameCube Wii Wii U Switch
PlayStation 3
Vita Nintendo 3DS
1.17.0
git
1.7.5 RC1
RetroArch 360 0.9.8.3
1.2
~ ~ ~ NC
PicoDrive PlayStation 2 Wii
PSP
PlayStation 3 Switch
Nintendo DS Nintendo 3DS
1.17.0
1.93
PicoDrive 1.51b
~ ~ ~ NC*
jEnesisDS Nintendo DS v0.7.4
Virtual Console Wii N/A
PGEN PlayStation 2 git ? ~
Sega Genesis Plus Xbox 360 Libxenon ?
  1. CI-Windows CI-Linux CI-Macos
  2. GENS and Gens/GS supports Sega CD and 32X emulation, MDP plugin, Gamepad and Command line parsing but these features not ported from Gens/GS to Gens/GS II
  3. Superseded by ares

Comparisons[edit]

BlastEm
Aims for cycle accuracy but unlike Exodus, aims for lower system requirements and has substantially higher compatibility. Latest stable release is quite old, use nightly or libretro core. BlastEm's own sound implementation is solid, however it's still a bit less accurate than Nuked core. Differences between them are mostly inaudible though and both are way more accurate than the old MAME sound emulation core.
Genesis Plus GX
A solid emulator for the Sega Genesis / Sega Master System / Sega CD / Game Gear. Made primarily for the Gamecube, it also has a Wii version and a cross-platform libretro core. The only things it lacks are 32X and Pico support, and a native desktop port. The only way to get this emulator on the desktop is to use the aforementioned libretro core, which allows for all the benefits of libretro like EmuVR support, shader presets, dynamic sync, and other enhancements. The version used in BizHawk adds features for speedrunners but only the version used in RetroArch supports Nuked OPN2 cycle-accurate Yamaha YM3438(YM2612). The default option for sound emulation, available in all versions, is the old MAME core, because it's very fast.
Genesis Plus GX Wide
Custom fork of Genesis Plus GX available as a libretro core, it includes experimental widescreen options. Sega CD/Mega CD games are currently unsupported.
Genesis Plus GX-Cyclone
Custom fork of Genesis Plus GX available as a libretro core, it includes support for games with enhanced graphics designed for the Firecore system-on-a-chip made by Digital Media Cartridge Ltd.
higan / ares
Also developing cycle-accurate Genesis emulation, akin to its own SNES emulator core. v130 version brings "YM2612 improvement" and support for "Mega Mouse". v131 version of ares boasts 95% compatibility with 32X games, while there are still minor glitches, this is leaps and bounds better than other emulators as of late December 2022. v132 version of ares brings every single Sega Mega CD game at least boots; with an estimated 86% of the library playable to completion.
PicoDrive
Strongly prioritizes performance over accuracy. Compatibility and accuracy aren't as good as Genesis Plus GX but it's useful on very underpowered systems like the Raspberry Pi Zero. Currently the first and only cross-platform option for Pico games. Libretro and BizHawk versions don't have a stylus or turn page support, while the obsolete standalone version does.
BizHawk
"Just works out of the box" solution for Genesis/Mega Drive, CD & 32X, bundled with two cores (Genplus-GX/Genesis Plus GX without Nuked OPN2 support and PicoDrive), ensuring both excellent compatibility and good speed.
Kega Fusion
The project of an employee with previous experience at Sega. Kega Fusion has high compatibility, is easy to use, and has plugin-based filter support but it is no longer updated. It has been surpassed by better emulators and also has some issues on newer versions of Windows which can be solved with compatibility settings.
Exodus
Exodus is one of the first emulators to attempt cycle accuracy at the high cost of system requirements, but it is no longer updated and far from complete. It is still somewhat useful as a reference for the Genesis hardware, but users will have a faster and more accurate experience with BlastEm or other recommended emulators for Genesis.
Regen
A focus on accuracy has earned its high compatibility with games, but it does not emulate the Sega CD and 32X. It also allows overclocking.
MAME
Runs most games fine. Some don't work that well, but it's got about a 95% compatibility rate. Almost all of the C/C-2 arcade games work well in MAME - only the Print Club games don't work. CD emulation not that good, the extra processors throw in more timing problems and 32X emulation has lots of timing issues. There are also suspected SH2 core bugs that come up more frequently on the 32X due to most games being programmed in assembly instead of C like most other SH2 platforms.
mednafen
Mednafen's Sega Genesis/Megadrive emulation is based off of Genesis Plus and information and code from Genesis Plus GX (old GPL-licensed version). The GPL-incompatible CPU and sound emulation cores in the aforementioned projects have been replaced with GPLed or GPL-compatible alternatives; heavily modified and improved YM2612 emulation from Gens, and Z80 emulation core from FUSE.
Sega Genesis/Megadrive emulation should still be considered experimental; there are still likely timing bugs in the 68K emulation code, the YM2612 emulation code is not particularly accurate, and the VDP code has timing-related issues.
GENS
Close to Kega Fusion in features and compatibility but has largely been surpassed by better emulators. There are many different forks and iterations of Gens, so your experience will differ quite a lot depending on which version you use.
Nuked-MD
Emulates the Mega Drive hardware at the gate-level and is thus extremely accurate, but this accuracy comes at the cost of very low performance. A more practical FPGA port is also available.
Nintendo Switch Online (m2engage)
  • Genesis support was added to Nintendo Switch Online Expansion Pack in September 2021, alongside N64 games;
  • Users are limited to the selection of games Nintendo chooses to make available on the service;
  • Game lineup recycles pretty much everything from Sega Genesis Mini 1 and/or 2 minus the licensed IP (anime, manga, Disney, etc.) and Sega CD games;
  • Supports online and Local Play (up to 2 players);
  • Different games between regions (Japan and International)

Sound emulation[edit]

There are several options to emulate the sound hardware of the Genesis, some of them are shared by more than one emulator.

  • MAME - The old variant of this core is very popular but somewhat inaccurate, however it's very fast and still faithful enough to enjoy games for players less aware of the audio intricacies of the Genesis, as the overall sound character is still there. There's also a new variant of this core, supposedly more accurate, but still not as widespread.
  • ymfm - The core aiming to strike a balance between accuracy and performance, aiming for faithful sound reproduction with only inaudible inaccuracies to speed up the emulation considerably.
  • Nuked - Cycle-accurate core, aiming for the highest accuracy while still being usable in actual games. A go-to option for modern machines.

There are also emulator-specific sound emulation codes of varying accuracy, performance and general quality.

Enhancements[edit]

Name Genesis Plus GX Kega Fusion BlastEm PicoDrive ares BizHawk MAME FinalBurn Neo
Graphics Resizable Internal Resolution For emulation of 2D systems, the resolution can only be upscaled, making the pixels more apparent.
Sprite Replacement ? ? ? ? ? ? ? ?
Widescreen hack ~[N2 1] ? ? ? ? ? ? ?
Performance Internal Framerate Hack ? ? ? ? ? ? ? ?
Overclock ? ? ? ? ? ? ?
Post-Processing Filters
NTSC filters, HDR tonemapping etc.
? ? ? ? ~[N2 1]
Shader Chain ? ? ? ? ~[N2 1]
TAS features Macros/Scripts/Lua ? ? ? ? ? ? ? ?
Rewind ? ? ? ? ? ? ?
Fast-Forward/Turbo Speed ? ? ? ? ? ? ?
Savestates ? ? ? ? ? ? ?
Movie recording/playback ? ? ? ? ? ? ?
Controls Input lag-mitigating technique ? ? ? ? ? ? ?
Quality of life Built-in Graphics mod editor/manager ? ? ? ? ? ? ?
Built-in Cheat Manager ? ? ? ? ? ? ?
Built-in Custom resolution/CRTSwitchRes
For using this on Windows OS you need CRT Emudriver.
Another option is using EDID editor tool such as "Custom Resolution Utility".
Exclusive to libretro cores and GroovyMAME at the moment.
Also there is a project for achieving software emulators like libretro cores and GroovyMAME send the raw RGB data over a network to a core running on MiSTer, it basically turns the MiSTer into a GPU for the emulator allowing for easy setup and use with CRT TVs/Arcade monitors.
Streamable compression format ? ? ? ? ? ?
Per-Game Profiles ? ? ? ? ? ? ?
Command Line Options ? ? ? ? ? ? ?
Big Picture Mode
Misc Netplay ~[N2 1] ~[N2 1]
RetroAchievements
Mega Drive, 32X, CD
~[N2 1] ? ~[N2 1] ~[N2 1] ? ? ~[N2 1]
Debug Features ? ? ? ? ? ? ? ?
  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Exclusive to libretro core version. For widescreen hack use Genesis Plus GX Wide core.

Hardware features and accessories[edit]

Name Genesis Plus GX Kega Fusion BlastEm PicoDrive ares BizHawk MAME FinalBurn Neo
CD ~[N3 1] ~[N3 2] [N3 3]
32X * * ~[N3 3]
Six Button Control Pad ?
Menacer WIP ? *
The Justifier ? WIP ? *
Sega Mouse ? ? *
Team Player WIP ?
4 Way Play WIP ?
J-Cart ? ? ?
Sega Virtua Processor WIP ?
Sonic & Knuckles ? ?
XE-1 AP ? WIP ?
Activator ? ? ?
Saturn Keyboard ? ?
XB∀ND Keyboard ? ?
Floppy Disk Drive ? ? ? ?
MIDI Keyboard WIP ?
System Converter ~ ? ? ?
XBAND Modem
Mega Modem
Sega VR Only possible with SegaVR-DGenSDL emulator.
TeeVGolf ? ? ? ? ?
Game Genie ? ? ? ?
Action Replay ? ? ? ?
Modes MSU
Extended VRAM ~
SD Card Reader Beena ?
Lock-On ? ? ? ?
  1. While it supports Sega CD emulation, there is notable audio sync issues. Kega is not recommended for CD emulation.
  2. Experimental support in nightly builds only.
  3. 3.0 3.1 MAME 0.262 version compatibility status: CD and 32X.

MIDI Keyboard[edit]

MIDI keyboards are used in two special cartridges: Miracle Piano Teaching System, released only in US, and Wonder MIDI, released only in Japan and requires a Model 1 Wondermega (either RG-M1 or HWM-5000) to operate. While MIDI keyboards can be operated with MPTS as usual, Wonder MIDI also requires a special disc from the CD-MIDI standard to be inserted, as the software itself is not capable to do interactions with the soundchips of both Mega Drive and Mega-CD.

Info on Miracle Piano Teaching System in general
Info on Wonder MIDI

Lock-On[edit]

Lock-On Technology is a unique feature found on Sonic & Knuckles cartridges for the Sega Mega Drive/Genesis that allows a player to connect an older game to the cartridge's pass-through port for extended or altered gameplay.

  • With Sonic 3: Completes the game, and adds the Sonic and Knuckles levels as intended. This was the original usage.
  • With Sonic 2: Unlocks an alternate version of Sonic 2 with playable Knuckles.
  • With Sonic 1: Unlocks the Blue Sphere minigame with a level select for all possible levels.

The Sonic & Knuckles cartridge can lock on to other cartridges:

  • Smaller than 2MB: Will play a single random level from the Blue Sphere minigame generated from data in the header.
  • Bigger than 2MB: Will boot to Sonic & Knuckles.
  • Has Battery Pack: All saved data will be wiped out.

Most emulators don't support Lock-On save for Genesis Plus GX, but there are pre-combined ROMs for the Sonic trilogy available online that can be played as a regular Megadrive ROM on any emulator and still work. The Sonic 3 Complete romhack also achieves the same purpose.

Genesis Plus GX's RetroArch core includes true Lock-On emulation. From the Core Options menu, you can enable the Lock-On feature for either Sonic & Knuckles, Game Genie, or the Action Replay (Pro) -- the latter two using a different technology but with similar effects. Setting this option to anything other than "Off" will enable Lock-on to the cartridge you're currently playing as. After resetting, the game will boot in Lock-On mode.

The following files need to be under the directory for BIOS files (usually "system"):

  • sk.bin (Sonic & Knuckles (2 MiB) ROM)
  • sk2chip.bin (Sonic & Knuckles UPMEM (256 KiB) ROM): If you can't find it online, extract it with a hex editor from a pre-combined Sonic 2 & Knuckles ROM from offset 00300000 to the end of the ROM.

For GG/AR, the files needed are areplay.bin and ggenie.bin, but most emulators support cheat codes from these natively.

BlastEm also supports the Lock-On Technology for Sonic 3, except when combined with Sonic 2, as it does not support lock-on with the sk2chip.bin.

Modes[edit]

Mega Drive Plus / Genesis Plus / MSU-MD[edit]

The Mega Drive Plus / Genesis Plus (sometimes abbreviated as MD+) is a special mode for certain Genesis games that use enhanced CDDA tracks with a Sega CD. This was not used in any official games, however, the mode itself was first used in the first batch of Pier Solar releases. This feature was been documented to be used on Terraonion's Mega SD flash cartridge, to give similar effects for Genesis games in a way that MSU-1 does in patched SNES games. Another variant was been made for Mega Everdrive PRO, named MSU-MD.

Currently, only Genesis Plus GX supports both modes as mentioned here, while Kega Fusion supports games that can only run in MSU-MD mode.

A variant called 32x Plus (abbreviated as 32x+) made exclusively for Sega 32x games also exists, but again, it is only used by homebrew software, such as Doom 32x Resurrection.

Extended VRAM[edit]

A 128KB VDP mode from TeraDrive, an IBM PC/Mega Drive combo used on several Teradrive-only software.[1]

On standard Genesis games, it is used in Space Harrier and Space Harrier II ports available on Genesis Mini 2 / Mega Drive Mini 2.[2] BlastEm has partial support for this mode since version 0.5.0.

Hardware variations[edit]

Firecore[edit]

Firecore is a system-on-a-chip clone hardware based on the Sega Genesis/Mega Drive system, originating in the late 2000s. Most emulators have not been tested with Firecore-enhanced titles, however it is unlikely that they are supported.

Emulation of this clone possible with Genesis-Plus-GX-Cyclone fork. Also there is a MAME support as well but currently it has "MACHINE_NOT_WORKING" flag.

Pico[edit]

PicoDrive standalone version, KEGA Fusion and MAME supports this hardware. Keep in mind that PicoDrive libretro core or BizHawk core version doesn't have a stylus or turn page support, while the obsolete standalone version does. Also there is a feature request for ares emulator.

MAME 0.262 compatibility list
See dedicated page for more information.

Advanced Pico Beena[edit]

Latest MAME versions supports this hardware.

MAME 0.262 compatibility list
See dedicated page for more information.

Arcade[edit]

Sega released three arcade boards based on the Genesis / Mega Drive hardware:

In addition, several Genesis games were converted to stand-alone Arcade machines, either with or without a license from Sega.

MAME emulator supports these arcade boards, 0.262 version compatibility status; Mega Play, Mega-Tech and System C/C-2

External links[edit]

Dreamcast logo.png
Consoles: SG-1000Master SystemGenesis / Mega DriveCD32XPicoSaturnDreamcast
Handhelds: Game GearVMU / VMS
Arcade: System seriesModel 1Model 2Model 3NAOMI