jeffv03 / adf-reader

Read and extract files from Amiga Disk Format (*.adf) files in plain javascript

ADF-reader

Read and extract files from Amiga Disk Format (*.adf) files in plain javascript.
Currently only standard Amiga Double Density disk are supported (the 880 kb ones)
For folder and file parsing, only AmigaDOS formatted disks are supported.

The main module is adf.js
It uses a binary file wrapper at file.js for easy parsing binary data.

The rest of the package is a small demo, providing a simple user interface to browse the disk.
Live demo at http://www.stef.be/adfviewer/

It disregards all block checksums and file attributes, which makes it quite useful to salvage files from corrupt disks.
For further digging, you can also extract raw sectors for reconstructing deleted files etc.

I mainly wrote it to quickly inspect .adf files for Amiga music tracker files or Emerald Mine disks without the need to fire up an Amiga Emulator.

Main API:

adf.loadDisk(source)

Loads a disk from an adf file. When source is a string, it's considered as a URI, otherwise you can pass an ArrayBuffer.
All future actions will be done on this disk.

adf.getInfo()

Returns some basic info on the disk.

adf.readRootFolder()

Returns the files and directories of the root folder of the disk.
Each file and folder has a sector parameters which points to the start sector of the file or folder.

adf.readFolderAtSector(sector)

Returns the files and directories of a specific folder that starts at sector.
The starting sector is usually obtained from listing the root folder.
Each file and folder has a sector parameters which points to the start sector of the file or folder.
Each file and folder also has a parent parameter indicating the parent folder so you can traverse back up.

adf.readFileAtSector(sector,includeContent)

Returns the file info (and optional content) of the file starting at sector
The starting sector is usually obtained from listing a folder.
If includeContent is true then the content parameter contains the binary content of the file.

additional API

The following methods are available for low level disk reading

readSector(sector)

Returns a raw sector from the disk.
A sector of a standard Amiga is 512 bytes

getSectorType(sector)

Returns the type of the sector (headerBlock, dataBlock, extentionBlock, ...)

readHeaderBlock(sector)

Returns a parsed headerBlock

readDataBlock(sector)

Returns a parsed dataBlock

readExtentionBlock(sector)

Returns a parsed extentionBlock