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fluxengine/doc/disk-atarist.md
2021-05-20 22:41:03 +02:00

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Disk: Atari ST
==============
Atari ST disks are standard MFM encoded IBM scheme disks without an IAM header.
Disks are typically formatted 512 bytes per sector with between 9-10 (sometimes
11!) sectors per track and 80-82 tracks per side.
Reading disks
-------------
Just do:
fluxengine read atarist
...and you'll end up with an `atarist.st` file. The size of the disk image will
vary depending on the format. This is an alias for `fluxengine read ibm` with
preconfigured parameters.
Writing disks
-------------
FluxEngine can also write Atari ST scheme disks.
The syntax is:
fluxengine write <format> -i input.st
`<format>` can be one of these:
- `atarist360`: a 360kB 3.5" disk, with 80 cylinders, 1 side, and 9 sectors
per track.
- `atarist370`: a 370kB 3.5" disk, with 82 cylinders, 1 side, and 9 sectors
per track.
- `atarist400`: a 400kB 3.5" disk, with 80 cylinders, 1 side, and 10 sectors
per track.
- `atarist410`: a 410kB 3.5" disk, with 82 cylinders, 1 side, and 10 sectors
per track.
- `atarist720`: a 720kB 3.5" disk, with 80 cylinders, 2 sides, and 9 sectors
per track.
- `atarist740`: a 740kB 3.5" disk, with 82 cylinders, 2 sides, and 9 sectors
per track.
- `atarist800`: a 800kB 3.5" disk, with 80 cylinders, 2 sides, and 10 sectors
per track.
- `atarist820`: a 820kB 3.5" disk, with 82 cylinders, 2 sides, and 10 sectors
per track.
See [the IBM format documentation](disk-ibm.md) for more information.
Useful references
-----------------
- [Atari ST Floppy Drive Hardware
Information](https://info-coach.fr/atari/hardware/FD-Hard.php) by Jean
Louis-Guerin
- [Atari ST Floppy Drive Software
Information](https://info-coach.fr/atari/software/FD-Soft.php) by Jean
Louis-Guerin