971 B
Acorn ADFS family (ro)
Acorn ADFS disks are used by the 6502-based BBC Micro and ARM-based Archimedes series of computers. They are yet another variation on MFM encoded IBM scheme disks, although with different sector sizes and with the 0-based sector identifiers rather than 1-based sector identifiers. The index hole is ignored and sectors are written whereever, requiring FluxEngine to do two revolutions to read a disk.
There are various different kinds, which should all work out of the box.
Be aware that Acorn logical block numbering goes all the way up side 0 and then all the way up side 1. However, FluxEngine uses traditional disk images with alternating sides, with the blocks from track 0 side 0 then track 0 side 1 then track 1 side 0 etc. Most Acorn emulators will use both formats, but they might require nudging as the side order can't be reliably autodetected.
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