# Sega NAOMI

<div align="left"><figure><picture><source srcset="https://raw.githubusercontent.com/fabricecaruso/es-theme-carbon/91d85c7849cc550b0cac4e75cb8e0923d3b61b5e/art/logos/naomi-w.svg" media="(prefers-color-scheme: dark)"><img src="https://raw.githubusercontent.com/fabricecaruso/es-theme-carbon/52ff37c9e265587d006945a2ba695b5a962b3a3d/art/logos/naomi.svg" alt=""></picture><figcaption></figcaption></figure></div>

Arcade - Released: 1998&#x20;

{% embed url="<https://en.wikipedia.org/wiki/Sega_NAOMI>" %}

## Information

<table data-header-hidden><thead><tr><th width="224"></th><th></th></tr></thead><tbody><tr><td><strong>Emulators</strong></td><td><ul><li>Libretro: flycast</li><li>flycast</li><li>demul</li></ul></td></tr><tr><td><strong>File folder</strong></td><td><span data-gb-custom-inline data-tag="emoji" data-code="1f4c2">📂</span> roms \ <span data-gb-custom-inline data-tag="emoji" data-code="1f4c2">📂</span> naomi</td></tr><tr><td><strong>File extension</strong></td><td>.bin .dat .lst .zip .7z</td></tr></tbody></table>

## System Features

<table><thead><tr><th width="256">Retroachievements</th><th width="243">Netplay</th><th>Controller autoconfig</th></tr></thead><tbody><tr><td>lr-flycast: YES<br>Flycast: YES<br>Demul: NO</td><td>NO</td><td>lr-flycast: YES<br>Flycast: YES<br>Demul: YES</td></tr></tbody></table>

## Bios Information

<table><thead><tr><th width="160.55555555555557">bios file</th><th width="155">Folder</th><th>md5</th></tr></thead><tbody><tr><td>naomi.zip</td><td><code>\bios\dc</code></td><td>eb4099aeb42ef089cfe94f8fe95e51f6</td></tr></tbody></table>

{% hint style="info" %}
For Flycast standalone, BIOS file must be placed in `emulators\flycast\data` folder.
{% endhint %}

## Controls

{% hint style="danger" %}
In construction : default RetroArch mapping.
{% endhint %}

## Specific system information

### CHD files

Some NAOMI boards use just ZIP ROMs to run, but most others use a CHD files in addition to the .zip file.

CHD files must be placed in your rom folder, along the zip file, in a folder named exactly as the .zip file.

```
roms\
└─ naomi\
   ├─ ikaruga\
   │  └─ gdl-0010.chd
   └─ ikaruga.zip
```

### Service Menu

Some games have a per-game menu for accessing the machine's advanced configuration such as its dip switches, service mode and diagnostic input.

To access the service menu for NAOMI games, you need first to enable the Service Mode from the RetroBat advanced menu (set it to YES):

<div align="left"><figure><img src="https://i.imgur.com/ztsYbF4.png" alt=""><figcaption></figcaption></figure></div>

<div align="left"><figure><img src="https://i.imgur.com/FcFsHjG.png" alt=""><figcaption></figcaption></figure></div>

Once done, you will be able access the per-game Service Menu by pressing L3 + R3 buttons on the controller.