On 2/20/19 3:40 PM, Warner Losh wrote:

> The RX50's are MFM encoded. There's no FM anything on it, unless it's
> that way on all MFM diskettes.
> 
> Other DEC diskettes may have done this, but RX50's are just higher track
> density, but old pre IBM-AT data encoding rate diskettes.
> 
> At least on the Rainbow the floppy chip is kept in MFM mode all the
> time, unless you've written something to hack it to read alien disks.

You're quite correct--I didn't notice the "RX50" until I'd posted.  No,
I was thinking (as probably was the OP) of RX02 double-density.

--Chuck

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