mirror of
https://github.com/davidgiven/fluxengine.git
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40 lines
1.3 KiB
Markdown
40 lines
1.3 KiB
Markdown
Disk: Victor 9000
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=================
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The Victor 9000 / Sirius One was a rather strange old 8086-based machine
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which used a disk format very reminiscent of the Commodore format; not a
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coincidence, as Chuck Peddle designed them both. They're 80-track, 512-byte
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sector GCR disks, with a variable-speed drive and a varying number of sectors
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per track --- from 19 to 12. Disks can be double-sided, meaning that they can
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store 1224kB per disk, which was almost unheard of back then.
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FluxEngine reads these.
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Reading discs
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-------------
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Just do:
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```
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fluxengine read victor9k
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```
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You should end up with an `victor9k.img` which is 774656 bytes long.
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if you want the double-sided variety, use `--heads 0-1`.
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**Big warning!** The image may not work in an emulator. Victor disk images are
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complicated due to the way the tracks are different sizes and the odd sector
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size. FluxEngine chooses to store them in a simple 512 x 19 x 1 x 80 layout,
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with holes where missing sectors should be. This was easiest. If anyone can
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suggest a better way, please [get in
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touch](https://github.com/davidgiven/fluxengine/issues/new).
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Useful references
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-----------------
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- [The Victor 9000 technical reference manual](http://bitsavers.org/pdf/victor/victor9000/Victor9000TechRef_Jun82.pdf)
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- [DiskFerret's Victor 9000 format guide](https://discferret.com/wiki/Victor_9000_format)
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