> For the complete documentation index, see [llms.txt](https://noah978.gitbook.io/delta-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://noah978.gitbook.io/delta-docs/rom-guidelines.md).

# ROM Guidelines

Delta Emulator only supports *some* systems and each one of those systems requires the ROM's file extension (for example: `.gba`) to be a specific extension in order for Delta to recognize the system to which the ROM belongs. To make things easier, the extension is not case-sensitive.

When importing ROMs into Delta, it is suggested that you import it as a `.zip` file. When creating the zip file, be sure to include only the ROM; if you zip a folder with the ROM inside, it will fail to import.

| Game System                        | Supported Extensions               |
| ---------------------------------- | ---------------------------------- |
| **Game Boy**                       | `.gb`                              |
| **Game Boy Color**                 | `.gbc` , `.sgb`                    |
| **Game Boy Advance**               | `.gba` , `.srl`                    |
| **Nintendo DS**                    | `.nds` , `.dsi` , `.srl`           |
| **Nintendo / Famicom**             | `.nes` , `.nez` , `.fc` , `.fds`   |
| **Super Nintendo / Super Famicom** | `.snes` , `.sfc` , `.smc` , `.fig` |
| **Nintendo 64**                    | `.n64` , `.z64` , `.v64` , `.ndd`  |

For an advanced breakdown of ROM formats please refer to the [Emulation General wiki.](https://emulation.gametechwiki.com/index.php/List_of_filetypes)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://noah978.gitbook.io/delta-docs/rom-guidelines.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.