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The '''NAOMI''' ('''New Arcade Operation Machine Idea''') is an arcade system released by Sega in 1998. The acronym in Japanese means beauty above all else. It was designed as a successor to [[Sega Model 3]] hardware, using a similar architecture to the Sega [[Dreamcast]].
The NAOMI was succeeded by the Sega Hikaru and Sega NAOMI 2 boards, though having out-lasted the NAOMI 2, Hikaru and Sega AuroraSystem SP. The Sega Chihiro, or possibly even the Sega Lindbergh, could also be seen as successors.
The NAOMI board and almost all of its variants were united in common by running on mostly the SH-4 32-bit RISC CPU. Next, all but two of these various boards shared their own form of the PowerVR 2 graphics processor with some differences in specifications (eg. either single or twin CPUs). The exception was the Cave CV1000 which ran on a Hitachi SH-3 CPU and its GPU was the Altera Cyclone EP1C12 FPGA. Many of them also utilized their own Yamaha audio chipset. Sega Hikaru had its own Sega Custom 3D GPU composed of dual PowerVR 2 GPU chips.
* Sega NAOMI 2 (2001–2006) <ref group=N name=NAOMI2-Prototype>A prototype version of an unreleased game called ''Jet Squadron'' was made on the NAOMI 2 board in 2000 but the first officially released games started in 2001.</ref>
* Sammy Atomiswave (2003–2009)
* Sega System SP (2004–2009. AKA ) <ref group=N name=SystemSP_Aurora>Not really the same as SI Electronics' "Aurora", commonly mislabelled as "Sega Aurora").</ref>
* Cave CV1000B (2004–2007) <ref group=N name=Cave>The 'arcade_compat.txt' file inside DEmul's release archives do not have any Cave CV1000 emulation compat list, so its games' status is unknown.</ref>
* Cave CV1000D (2008–2012)
! scope="col"|NAOMI 2
! scope="col"|Atomiswave
! scope="col"|AuroraSystem SP
! scope="col"|Cave CV1000
! scope="col"|Active
*'''reicast libretro''' is the libretro core of the independent reicast emulator and seems to be more advanced in overall compatibility and feature levels of Dreamcast and several arcade boards emulation. It is possible that some optional hacks are used to achieve correct graphics on some compatible arcade games.
*'''nullDC''' was the first independent, open-source Dreamcast emulator to attempt emulation of the NAOMI arcade board. Its compatibility is unknown, so is not included in the NAOMI compatibility chart below. The emulator has since been superseded by its follow-up spin-off, 'reicast', although that one doesn't yet have any arcade board support. However, its libretro arm now supports partial emulation of NAOMI and Atomiswave boards.
*'''[[MAME]]''' is a long way behind DEmul in terms of compatibility but is being actively developed. It is shown to have adequate support of the NAOMI (Most games could show graphics & some are playable), and preliminary support for Atomiswave and Hikaru boards and at least [https://wiki.mamedev.org/index.php/MAME_0.127u1 BIOS] support for NAOMI 2. [https://wiki.mamedev.org/index.php/MAME_0.191 v0.191] (Oct 2017) supports SuperH CPU cores and has a preliminary SH3/SH4 recompiler for CV-1000 only. NAOMI & Hikaru driver emulation was still being worked on since then up to [https://wiki.mamedev.org/index.php/MAME_0.201 0.201] (Aug 2018). Game compatibility probably not available.
==Games==
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|Mazan: Flash Of The Blade <br/>(Multiboard version)
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===NAOMI Satellite Terminal===
Sega's NAOMI Satellite Terminal Hardware infrastructure enabled developers to make games with multiple control terminals, so several people could sit and play a game that has one large screen. The Satellite Terminal Hardware links up to 10 NAOMI boards.[125] Multi-terminal systems like this made use of Memory Card Reader and Dispenser (MCRD) technology. Derby Owners Club (2000) and World Club Champion Football (2002) are two applications of these technologies.
{| class="wikitable sortable" style="text-align:center;"
! scope="col"|Game
! scope="col"|DEmul*
! scope="col"|reicast libretro**
! scope="col"|MAME***
! scope="col"|Ports****
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|Derby Owners Club
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|Derby Owners Club 2
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|Derby Owners Club 2 Ver.2
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|Derby Owners Club 2 Ver.2.1
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|Derby Owners Club 2000
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|Derby Owners Club World Edition
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|Sega Network Taisen Mahjong MJ
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|Star Horse
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|Star Horse 2001
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|Star Horse 2002
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|Star Horse Progress
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|Star Horse Progress Returns
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|The Quiz Show
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* [https://fr.wikipedia.org/wiki/Liste_des_jeux_Naomi French Wiki's list of NAOMI games]
* [https://wiki.arcadeotaku.com/w/Category:Game_Hardware Arcade Otaku wiki]
* [http://www.system16.com/hardwaremuseum.php?id=721 1 System-16] (Games & technical specsfor several NAOMI hardware)
* [https://www.uvlist.net/groups/info/arcadehardware UVList]
* [https://www.arcade-museum.com/game_detail.php?game_id=9471 Arcade Museum]
==External Links==
* [https://www.giantbomb.com/sega-naomi/3015-8767/games/ Giantbomb]
* [http://www.thedreamcastjunkyard.co.uk/2016/01/guest-article-expanding-dreamcast.html The Dreamcast Junkyard retrospective]
* [http://romshepherd.com/index.php?topic=4325.0 romshepherd.com's thread] (DEmul's arcade setup guide)
* [https://forums.launchbox-app.com/topic/38161-sammy-atomiswave-demullaunchbox-tutorial/ forums.launchbox-app.com's thread] (DEmul's Atomiswave setup guide)
* [http://www.system16.com/hardware.php?id=732 System-16] (Technical specs are likely inaccurate)
* [http://www.arcaderestoration.com/games/13337/Sega+System+SP.aspx Arcade Restoration] (MAME emulation status)
* [http://www.thedreamcastjunkyard.co.uk/2017/03/expanding-dreamcast-collection-part-5.html The Dreamcast Junkyard retrospective]
'''Cave CV-1000'''
* [https://fr.wikipedia.org/wiki/Cave_3rd_Generation French Wiki] (Cave 3rd gen.)
