Editing Neo Geo and variants

{{Infobox console
|title = SNK Neo Geo
|logo = Neo_Geo_full_on.png
|image = Neo-Geo-AES-Console-Set.png
|image2 = Neo_Geo_CD.png
|imagecaption = '''Top:''' The Neo Geo MVS.<br/>'''Middle:''' The Neo Geo AES.<br/>'''Bottom:''' The Neo Geo CD.
|developer=[[SNK]]
|type = [[:Category:Home consoles|Home video game console]], [[:Category:Arcade|arcade system board]]
|generation = [[:Category:Fourth-generation video game consoles|Fourth generation]]
|release=1990 (Neo Geo Multi Video System, Neo Geo Rental System)<br>1991 (Neo Geo Advanced Entertainment System)<br>1994 (Neo Geo CD)<br>1997 (Hyper Neo Geo 64)
|discontinued=2004 (Neo Geo Multi Video System)<br>1999 (Hyper Neo Geo 64, Neo Geo CD)
|successor=Hyper Neo Geo 64, Neo Geo CD
|emulated = {{✓}}
}}

The '''[[gametech:Neo-Geo|Neo Geo MVS]]''' (Multi Video System) arcade system was first released by [[wikipedia:SNK|SNK Corporation]] on January 1990 in Japan and on August 22, 1990 in NA. The '''[[wikipedia:Neo_Geo_(system)|Neo Geo AES]]''' (Advanced Entertainment System) home console was released on July 1, 1991. MVS and AES are technically the same systems, but their cartridges are not compatible with each other due to a different layout. The AES was retailed for {{Inflation|USD|649.99|1991}}. It had a Motorola 68000 at 12MHz and a Zilog Z80A at 4MHz with 64KB RAM and 84KB VRAM.

'''[[wikipedia:Neo_Geo_CD|Neo Geo CD]]''' (NG-CD) was the CD version of the AES (not compatible with the game cartridges) released in January of '96 and <abbr title="$651.32 in 2018 money">$399</abbr>. It had a Motorola 68000 CPU at 12 MHz with another CPU that being a Zilog Z80 at 4 MHz. It had 7MB of RAM.

'''[[wikipedia:Hyper_Neo_Geo_64|Hyper Neo-Geo 64]]''' (HNG-64) was the successor to the Neo-Geo with 3D graphics, there was no home console release. It was released in September of 1997 and had an NEC VR4300 at 100 MHz with 16MiB of RAM.

When emulating Neo-Geo games with RetroArch, the Neo-Geo BIOS files need to be in the game directory.

==Emulators==
<div style="overflow-x:auto">
{| class="wikitable" style="text-align:center;width:100%"
! scope="col"|Name
! scope="col"|Platform(s)
! scope="col"|Latest Version
! scope="col"|NG
! scope="col"|NG-CD
! scope="col"|HNG-64
! scope="col"|[[#Enhancements|Enhancements]]
! scope="col"|<abbr title="Free/Libre and Open-Source Software">FLOSS</abbr>
! scope="col"|Active
! scope="col"|[[Recommended Emulators|Recommended]]
|-
! colspan="10"|PC / x86
|-
|[[MAME]]
|align=left|{{Icon|Windows|Linux|macOS|FreeBSD}}
|<abbr title="Latest development version">git artifacts</abbr><ref group=N>[https://nightly.link/mamedev/mame/workflows/ci-windows/master CI-Windows] [https://nightly.link/mamedev/mame/workflows/ci-linux/master CI-Linux] [https://nightly.link/mamedev/mame/workflows/ci-macos/master CI-Macos]</ref></br>[http://www.mamedev.org/release.html {{MAMEVer}}]<br/>[https://buildbot.libretro.com/nightly/ libretro core]<ref group=N>As 0.251, 0.139 (2010), 0.78 (2003), 0.37b5 (2000)</ref> 
|{{✓}} ||{{✓}} ||{{~}}[[#Emulation_issues|*]] ||{{~}} ||{{✓}} ||{{✓}} ||{{✓}}
|-
|[[FinalBurn Neo]]
|align=left|{{Icon|Windows|Linux|macOS}}
|[https://buildbot.libretro.com/nightly/ libretro core]<br/>[https://github.com/finalburnneo/FBNeo/releases/tag/latest nightly]<br/>[https://github.com/finalburnneo/FBNeo/releases/latest stable]
|{{✓}} ||{{~}} ||{{✗}} ||{{~}} ||{{NC}} ||{{✓}} ||{{✓}}
|-
|[[RAINE]]
|align=left|{{Icon|Windows|Linux|macOS}}
|[http://raine.1emulation.com/download/latest.html {{RAINEVer}}]
|{{✓}} ||{{✓}} ||{{✗}} ||{{~}} ||{{✓}} ||{{✓}} ||{{~}}
|-
|[https://github.com/libretro/neocd_libretro NeoCD<br/><small>neocd_libretro</small>]
|align=left|{{Icon|Windows|Linux|macOS}}
|[https://buildbot.libretro.com/nightly/ libretro core]
|{{✗}} ||{{✓}} ||{{✗}} ||{{~}} ||{{✓}} ||{{✓}} ||{{~}}
|-
|[[ares]]
|align=left|{{Icon|Windows|Linux|macOS}}
|[https://github.com/ares-emulator/ares/releases {{aresVer}}]
|{{✓}} ||{{✗}} ||{{✗}} ||{{~}} ||{{✓}} ||{{✓}} ||{{~}}
|-
|[[FinalBurn Alpha]]
|align=left|{{Icon|Windows}}
|[http://www.fbalpha.com/downloads {{FinalBurnAlphaVer}}]
|{{✓}} ||{{✓}} ||{{✗}} ||{{?}} ||{{NC}} ||{{✗}} ||{{✗}}
|-
|[https://web.archive.org/web/20141105014113/http://www.xe-emulator.com Xe]
|align=left|{{Icon|Windows|Linux}}
|[https://web.archive.org/web/20141022230129/http://www.xe-emulator.com/index.php?m=download {{XeVer}}]
|{{✓}} ||{{✓}} ||{{✗}} ||{{?}} ||{{✗}} ||{{✗}} ||{{✗}}
|-
|[[Kawaks]]
|align=left|{{Icon|Windows}}
|[http://cps2shock.emu-france.info/download.html {{KawaksVer}}]
|{{✓}} ||{{✗}} ||{{✗}} ||{{?}} ||{{✗}} ||{{✗}} ||{{✗}}
|-
|GnGeo
|align=left|{{Icon|Linux}}
|[https://github.com/pepone42/gngeo git]
|{{✓}} ||{{✗}} ||{{✗}} ||{{?}} ||{{✓}} ||{{✗}} ||{{✗}}
|-
|NeoRAGEx
|align=left|{{Icon|Windows}}
|[https://emulator.games/emulators/neo-geo/neoragex-5-4e/ 5.4e]
|{{✓}} ||{{✗}} ||{{✗}} ||{{?}} ||{{✗}} ||{{✗}} ||{{✗}}
|-
|Nebula
|align=left|{{Icon|Windows}}
|[https://www.emulator-zone.com/doc.php/arcade/nebula.html 2.25b]
|{{✓}} ||{{✓}} ||{{✗}} ||{{?}} ||{{✗}} ||{{✗}} ||{{✗}}
|-
|[https://jgemu.gitlab.io/ Geolith]
|align=left|{{Icon|Windows|Linux|macOS|FreeBSD}}
|[https://gitlab.com/jgemu/geolith/-/tags 0.2.1]
|{{✓}} ||{{✗}} ||{{✗}} ||{{?}} ||{{✓}} ||{{✓}} ||{{TBD}}
|-
!colspan="10"|Mobile / ARM
|-
|[[FinalBurn Neo]]
|align=left|{{Icon|Android|iOS}}
|[https://buildbot.libretro.com/nightly/ libretro core]
|{{✓}} ||{{✓}} ||{{✗}} ||{{~}} ||{{NC}} ||{{✓}} ||{{✓}}
|-
|[[MAME]]
|align=left|{{Icon|Android|iOS}}
|[https://buildbot.libretro.com/nightly/ libretro core]<ref group=N>As "[https://github.com/libretro/libretro-core-info/blob/master/mamearcade_libretro.info mamearcade_libretro] and 	
mame_libretro_ios.dylib", 0.139 (2010), 0.78 (2003), 0.37b5 (2000)</ref>
|{{✓}} ||{{✓}} ||{{~}}[[#Emulation_issues|*]] ||{{~}} ||{{✓}} ||{{✓}} ||{{~}}
|-
|[https://github.com/libretro/neocd_libretro NeoCD<br/><small>(neocd_libretro)</small>]
|align=left|{{Icon|Android|iOS}}
|[https://buildbot.libretro.com/nightly/ libretro core]
|{{✗}} ||{{✓}} ||{{✗}} ||{{~}} ||{{✓}} ||{{✓}} ||{{~}}
|-
|[http://www.explusalpha.com/contents/neo-emu NEO.emu]
|align=left|{{Icon|Android}}
|[https://play.google.com/store/apps/details?id=com.explusalpha.NeoEmu 1.5.73][https://github.com/Rakashazi/emu-ex-plus-alpha git]
|{{✓}} ||{{✗}} ||{{✗}} ||{{?}} ||{{✓}} ||{{✓}} ||{{~}}
|-
|[[FinalBurn Alpha]]
|align=left|{{Icon|Android|iOS}}
|[https://buildbot.libretro.com/nightly/ libretro core]
|{{✓}} ||{{✓}} ||{{✗}} ||{{?}} ||{{NC}} ||{{✗}} ||{{✗}}
|-
! colspan="10"|Consoles
|-
|NJ-EMU
|align=left|{{Icon|PSP}}
|[https://github.com/phoe-nix/NJEMU git]
|{{✓}} ||{{✓}} ||{{✗}} ||{{?}} ||{{✓}} ||{{✗}} ||{{✓}}
|-
|[[Virtual Console]]
|align=left|{{Icon|Wii}}
|N/A
|{{✓}} ||{{✗}} ||{{✗}} ||{{?}} ||{{✗}} ||{{✗}} ||{{✓}}
|-
|[http://chui.dcemu.co.uk/aes4all.html AES4ALL]
|align=left|{{Icon|Dreamcast}}{{Icon|Dingoo}}
|Beta 4
|{{✓}} ||{{✗}} ||{{✗}} ||{{?}} ||{{✓}} ||{{✗}} ||{{~}}
|-
|[https://code.google.com/archive/p/gxgeo GxGeo]
|align=left|{{Icon|Wii}}
|[https://code.google.com/archive/p/gxgeo/downloads {{GxGeoVer}}]
|{{✓}} ||{{✗}} ||{{✗}} ||{{?}} ||{{✓}} ||{{✗}} ||{{✓}}
|-
|[http://chui.dcemu.co.uk/neo4all.html NEO4ALL]
|align=left|{{Icon|Dreamcast}}{{Icon|Dingoo}}
|RC4
|{{✗}} ||{{✓}} ||{{✗}} ||{{?}} ||{{✓}} ||{{✗}} ||{{~}}
|}
</div>

<references group=N />

===Comparisons===
;[https://github.com/libretro/neocd_libretro NeoCD<small> (neocd_libretro)</small>]:
:[https://github.com/libretro/neocd_libretro NeoCD] is a S(ingle) A(rcade) M(achine) E(mulator) for libretro, just like [https://emulation.gametechwiki.com/index.php/Philips_CD-i_emulators#Emulators Same CDi <small>(same_cdi_libretro)</small>] forked from MAME libretro, which is in turn a fork of MAME. It includes only the [https://en.wikipedia.org/wiki/Neo_Geo_CD Neo Geo CD] driver, and simplifies the loading of CD content to provide a 'plug and play' experience.

;[[ares]]:
:Neo Geo emulation has undergone the most dramatic improvement out of any core [https://old.reddit.com/r/emulation/comments/11ltlvu/ares_multisystem_emulator_v132_has_been_released/ with v132 version release]; with a significant portion of the library jumping from "Nothing" state to "Completable".

==Enhancements==
<div style="overflow-x:auto;width:100%">
{| class="wikitable" style="text-align:center; vertical-align:middle;width:100%"
|- style="font-weight:bold;"
! colspan=2 | Name
! MAME
! FinalBurn Neo
! Ares
! RAINE
! NeoCD_libretro
|-
| rowspan=3 | Graphics
| [[Resolution|Resizable Internal Resolution]]
| ?
| ?
| ?
| ?
| ?
|-
| [[Texture_packs#Sprite_Replacement_.282D.29|Sprite Replacement]]
| ?
| ?
| ?
| ?
| ?
|-
| [[Widescreen_hacks#Sega_Genesis|Widescreen hack]]
| ?
| ?
| ?
| ?
| ?
|-
| rowspan=3 | Performance
| [[30/60_FPS_cheat_codes|Internal Framerate Hack]]
| ?
| ?
| ?
| ?
| ?
|-
| [[Overclocking#Sega_Genesis|Overclock]]
| ?
| ?
| ?
| ?
| ?
|-
| [https://blurbusters.com/frame-generation-essentials-interpolation-extrapolation-and-reprojection/ Frame generation technologies]<br/><small>([https://store.steampowered.com/app/993090/Lossless_Scaling/ LSFG], [https://github.com/NVIDIAGameWorks/Streamline/blob/main/docs/ProgrammingGuideDLSS_G.md DLSS-G], [https://www.techpowerup.com/316835/extrass-framework-paper-details-intels-take-on-frame-generation ExtraSS] and [https://community.amd.com/t5/gaming/amd-fluid-motion-frames-is-out-now-on-amd-radeon-rx-7000-series/ba-p/634372 AFMF])</small>
| colspan=5 | <small>Implementing frame generation technology in an emulator is unfortunately quite challenging and unlikely to be feasible in the near future, however post-processing techniques such as [[Wikipedia:Motion_interpolation|motion interpolation]] is quite possible. [[Input_lag|Input latency]] will be a crucial factor, but its impact likely varies depending on the specific technique employed, it's recommended to use '''after applying the "Internal Framerate Hack"'''.<br/>While '''[https://youtu.be/-KqkAFsFdaI AFMF]''' or '''LSFG''' can be used with MAME, please be aware that some visual glitches and artifacts may occur at this time.
|-
| rowspan=4 | Post-Processing
| [[Shaders_and_filters|Filters]]
| {{Y}}
| ?
| {{Y}}
| ?
| {{Y}}
|-
|[[Shaders_and_filters#AI-powered filters|AI-powered filter compatible]]<br/><small>([https://www.nvidia.com/en-us/geforce/news/gfecnt/nvidia-freestyle-ansel-enhancements-geforce-experience-article/ Freestyle])</small>
| {{?}}
| {{?}}
| {{?}}
| {{?}}
| {{?}}
|-
| [[Shader_Presets|Shader Chain]]
| {{Y}}
| {{~}}<ref group=N2 name=LibretroEx>Exclusive to libretro core.</ref>
| {{Y}}[https://github.com/ares-emulator/ares/pull/1397 *]
| ?
| {{Y}}
|-
|[[High_dynamic_range#Inverse_tone_mapping|Inverse tone mapping compatible]]
| {{?}}
| {{?}}
| {{?}}
| {{?}}
| {{Y}}[https://www.libretro.com/index.php/category/hdr/ *]
|-
| rowspan=5 | [https://tasvideos.org/Emulatorresources/Features TAS features]
| [[Wikipedia:Macro_(computer_science)|Macros/Scripts]]/[https://tasvideos.org/LuaScripting Lua]
| ?
| ?
| ?
| ?
| ?
|-
| Rewind
| ?
| ?
| ?
| ?
| ?
|-
| Fast-Forward/Turbo Speed
| ?
| ?
| ?
| ?
| ?
|-
| Savestates
| ?
| ?
| ?
| ?
| ?
|-
| [https://tasvideos.org/Movies Movie recording/playback]
| ?
| ?
| ?
| ?
| ?
|-
| rowspan=1 | Controls
| [[Input_lag|Input lag-mitigating technique]]
| {{N}}<abbr title="Use GroovyMAME for this.">*</abbr>
| ?
| ?
| ?
| ?
|-
| rowspan=7 | Quality of life
| Built-in [[Mods,_hacks_and_fan-translations#Built-in_graphics_mod_editor.2Fmanager_for_emulators|Graphics mod editor/manager]]
| {{N}}
| {{N}}
| {{N}}
| {{N}}
| {{N}}
|-
| Built-in [[Cheats_and_patches|Cheat Manager]]
| {{Y}}
| ?
| ?
| ?
| {{Y}}
|-
| Built-in [http://forum.arcadecontrols.com/index.php/topic,106405 Custom resolution/CRTSwitchRes]<br/><small>For using this on Windows OS you need [http://geedorah.com/eiusdemmodi/forum/viewtopic.php?pid=1009#p1009 CRT Emudriver].<br/>Another option is using EDID editor tool such as "Custom Resolution Utility".</small>
| colspan=5 | Exclusive to [https://docs.libretro.com/guides/crtswitchres/ libretro cores] and [[GroovyMAME]] at the moment.<br/>Also there is a [https://github.com/psakhis/Groovy_MiSTer 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.
|-
| [[Save_disk_space_for_ISOs|Streamable compression format]]
| {{Y}}
| ?
| ?
| ?
| {{Y}}
|-
| Per-Game Profiles
| {{Y}}
| ?
| ?
| ?
| {{Y}}
|-
| Command Line Options
| {{Y}}
| ?
| ?
| ?
| {{Y}}
|-
| [[Frontends#Graphical_User_Interfaces_.28GUIs.29|Big Picture Mode]]
| {{Y}}
| {{~}}<ref group=N2 name=LibretroEx></ref>
| {{N}}
| ?
| {{Y}}
|-
| rowspan=4 | Misc
| [[Netplay|Netplay]]
| {{N}}
| ?
| ?
| ?
| {{N}}
|-
| [[Virtual_reality#VR_game_room_simulations|EmuVR support]]
| colspan=5 |  Exclusive to [https://www.emuvr.net/wiki/Installation_Guide#Downloads libretro cores] at the moment.
|-
| RetroAchievements<br/></small>[https://retroachievements.org/gameList.php?c=56 NG-CD], [https://retroachievements.org/gameList.php?c=27 NG]
| {{N}}<ref group=N2>[https://docs.libretro.com/guides/retroachievements/#arcade Support is not likely to ever be possible. The same is true for all MAME variants.]</ref>
| {{Y}}<ref group=N2>[https://docs.libretro.com/guides/retroachievements/#arcade AES bios is required for many Neo Geo achievements. AES Asia (neo-epo.bin) is generally English.]</ref>
| {{N}}
| ?
| {{N}}
|-
| [[Wikipedia:Category:Debugging|Debug Features]]
| {{Y}}
| ?
| ?
| ?
| ?
|}
</div>
<references group=N2/>

==Emulation issues==
* Hyper Neo-Geo 64 is mostly emulated. MAME is the only available option and, since 0.240, all games are mostly playable with only bad audio emulation. There was a notable update for the MAME driver by [https://mamedev.emulab.it/haze/2018-starting-early Haze] in 2018 and in early 2023 The Hyper Neo Geo 64 has had some welcome fixes for both 2D and 3D graphics [https://www.mamedev.org/?p=522 with 0.252 version] and there should be [https://old.reddit.com/r/emulation/comments/11ojbde/part_3_of_hyper_neogeo_64_emulation_updates_in/ more coming in the next release]. {{MAMEVer}} version [http://adb.arcadeitalia.net/lista_mame.php?game_sourcefile=hng64.cpp&arcade_only=0&current_version=0 compatibility status] or you can use [https://github.com/mamedev/mame/blob/1bf4528d15d895d06bb0b5ee6eed372f6da48c6d/src/mame/snk/hng64.cpp#L3104 this link]. Hyper Neo-Geo 64 is one of the last pre-2000 Arcade platforms not playable on emulators by a "big" arcade company.

[[Category:Arcade]]
[[Category:Consoles]]
[[Category:Home consoles]]
[[Category:Fourth-generation video game consoles]]
[[Category:SNK consoles]]
[[Category:68000-based]]
[[Category:Z80-based]]