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40 lines
1.6 KiB
Markdown
40 lines
1.6 KiB
Markdown
acornadfs
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====
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## BBC Micro, Archimedes
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<!-- This file is automatically generated. Do not edit. -->
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Acorn ADFS disks are used by the 6502-based BBC Micro and ARM-based Archimedes
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series of computers. They are yet another variation on MFM encoded IBM scheme
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disks, although with different sector sizes and with the 0-based sector
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identifiers rather than 1-based sector identifiers. The index hole is ignored
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and sectors are written whereever, requiring FluxEngine to do two revolutions
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to read a disk.
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There are various different kinds, which should all work out of the box.
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Be aware that Acorn logical block numbering goes all the way up side 0 and
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then all the way up side 1. However, FluxEngine uses traditional disk images
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with alternating sides, with the blocks from track 0 side 0 then track 0 side
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1 then track 1 side 0 etc. Most Acorn emulators will use both formats, but
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they might require nudging as the side order can't be reliably autodetected.
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## Options
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- Format variants:
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- `160`: 160kB 3.5" or 5.25" 40-track SSDD; S format
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- `320`: 320kB 3.5" or 5.25" 80-track SSDD; M format
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- `640`: 640kB 3.5" or 5.25" 80-track DSDD; L format
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- `800`: 800kB 3.5" 80-track DSDD; D and E formats
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- `1600`: 1600kB 3.5" 80-track DSHD; F formats
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## Examples
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To read:
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- `fluxengine read acornadfs --160 -s drive:0 -o acornadfs.img`
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- `fluxengine read acornadfs --320 -s drive:0 -o acornadfs.img`
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- `fluxengine read acornadfs --640 -s drive:0 -o acornadfs.img`
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- `fluxengine read acornadfs --800 -s drive:0 -o acornadfs.img`
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- `fluxengine read acornadfs --1600 -s drive:0 -o acornadfs.img`
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