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

  • Format variants:
    • 360: 360kB 3.5” 80-track 9-sector SSDD
    • 370: 370kB 3.5” 82-track 9-sector SSDD
    • 400: 400kB 3.5” 80-track 10-sector SSDD
    • 410: 410kB 3.5” 82-track 10-sector SSDD
    • 720: 720kB 3.5” 80-track 9-sector DSDD
    • 740: 740kB 3.5” 82-track 9-sector DSDD
    • 800: 800kB 3.5” 80-track 10-sector DSDD
    • 820: 820kB 3.5” 82-track 10-sector DSDD

Examples

To read:

  • fluxengine read atarist --360 -s drive:0 -o atarist.img
  • fluxengine read atarist --370 -s drive:0 -o atarist.img
  • fluxengine read atarist --400 -s drive:0 -o atarist.img
  • fluxengine read atarist --410 -s drive:0 -o atarist.img
  • fluxengine read atarist --720 -s drive:0 -o atarist.img
  • fluxengine read atarist --740 -s drive:0 -o atarist.img
  • fluxengine read atarist --800 -s drive:0 -o atarist.img
  • fluxengine read atarist --820 -s drive:0 -o atarist.img

To write:

  • fluxengine write atarist --360 -d drive:0 -i atarist.img
  • fluxengine write atarist --370 -d drive:0 -i atarist.img
  • fluxengine write atarist --400 -d drive:0 -i atarist.img
  • fluxengine write atarist --410 -d drive:0 -i atarist.img
  • fluxengine write atarist --720 -d drive:0 -i atarist.img
  • fluxengine write atarist --740 -d drive:0 -i atarist.img
  • fluxengine write atarist --800 -d drive:0 -i atarist.img
  • fluxengine write atarist --820 -d drive:0 -i atarist.img

References

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