What is MIME type "application/x-amiga-disk-format"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

The MIME type application/x-amiga-disk-format marks a disk image from the Amiga system.
It holds a sector-by-sector copy of an original floppy disk. This file captures the boot sector, file allocation, and data structure as originally stored.

Emulation: It lets modern PCs run classic Amiga software.
Digital archiving: It preserves vintage operating system setups and programs.
Development: It helps test and debug legacy Amiga applications.
Data recovery: It allows extraction of files from old disks.

Files using this MIME type usually have the extension ADF.
For more details on the Amiga system, consider checking out this reference.

Associated file extensions

.adf

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: application/x-amiga-disk-format

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="application/x-amiga-disk-format">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');    
    
    http.createServer((req, res) => {    
      res.setHeader('Content-Type', 'application/x-amiga-disk-format');    
      res.end('Content here');    
    }).listen(3000);

Associated file extensions

.adf

FAQs

What is the purpose of the application/x-amiga-disk-format MIME type?

This MIME type identifies a raw disk image of a Commodore Amiga floppy disk, most commonly associated with the .adf file extension. These files are bit-for-bit copies of physical media used primarily for digital preservation and running legacy software in emulators like WinUAE or FS-UAE.

How do I configure an Apache server to serve ADF files correctly?

You can ensure your web server sends the correct headers by adding a directive to your .htaccess file or main configuration. Use the following line: AddType application/x-amiga-disk-format .adf. This helps browsers understand that the file is a binary disk image rather than generic text or data.

How do I add support for this MIME type in Nginx?

In your nginx.conf or the mime.types file included by your configuration, add the mapping inside the types block. The entry should look like this: application/x-amiga-disk-format adf;. After saving, reload Nginx to apply the changes.

Why does this MIME type start with 'x-'?

The x- prefix indicates that application/x-amiga-disk-format is a non-standard or experimental type not officially registered with the IANA (Internet Assigned Numbers Authority). It is a convention used by the developer community to identify Amiga disk images without conflicting with standard types.

Can web browsers open application/x-amiga-disk-format files directly?

Standard web browsers (Chrome, Firefox, Edge) cannot natively open or execute these files. When a user clicks a link pointing to this MIME type, the browser will typically prompt to download the file. However, specific JavaScript-based Amiga emulators embedded in a webpage can be programmed to load and run these files.

What software is required to open a file with this MIME type?

You need specific emulation software to mount or run these files. Popular tools include WinUAE for Windows, FS-UAE for multiple platforms, and Amiga Forever. These programs simulate the Amiga hardware, allowing the .adf file to function as if it were a physical floppy disk inserted into a real computer.

Is application/x-amiga-disk-format the same as ADZ?

Not exactly, though they are related. An ADZ file is simply a GZip-compressed version of an ADF file to save space. While the internal data is the same once decompressed, a server might identify the compressed version as application/gzip unless specifically configured otherwise.

General FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.