Could be, aye. I have to say, looking at it as a whole, it's a small wonder the Paintbox ca.1981 cost around 150 grand. Over 4 megabytes of RAM in total, over 600 kilobytes of ROM, a 160 meg hard disk as standard. In 1981. Yowza!
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2/ We also know that a track ends with that same value after de-MFMing. We also live in a day and age with cheap 32-bit microcontrollers that have USB interfaces, and can run C code, and with performance that blows a Disk Sequencer Card with an Am2910 out of the water.
Realistically what it needs is someone with both the necessary drive to sling the cartridge into, and both the hardware and software smarts to whip up a microcontroller-based solution to just step from cylinder to cylinder and head to head, dumping out the bistream.
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4/ I'm happy to advise on the timings, sequence of commands, and so on, but I have all the soldering skills of a pensioner with Parkinson's and the hardware acumen of a bricklayer.
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Get me one of the drives and I'll see what I can do - I've got equipment which can raw-read magnetic media given a suitable drive :)
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Already been rawreading old MFM/RLL harddrives via PC+Arduino+oscilloscope-hackery. Tried with STM32 alone, but even at 168 MHz it's just too slow. A beefier ARM-board is already waiting for the next attempt.
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Sounds like you're exactly the person who can help us; if we can source the necessary drive box, and we can get you the drive pack, do you think it would be doable to snag a raw read?
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