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fluxengine/doc/disk-atarist.md
2023-05-07 21:49:14 +00:00

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# Almost PC compatible
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.
For some reason, occasionally formatting software will put an extra IDAM record
with a sector number of 66 on a disk, which can horribly confuse things. The
Atari profiles below are configured to ignore these.
Be aware that many PC drives (including mine) won't do the 82 track formats.
## Options
(no options)
## 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