20 Feb
2019
20 Feb
'19
5:08 p.m.
> Ability to read MFM data with FM headers (RX50)
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.
On Wed, 20 Feb 2019, Chuck Guzis via cctalk wrote:
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.
That was my mistake. I wrote RX50, but I meant RX02.
And, as Chuck pointed out, the MFM data within the sectors is not quite
the same as the MFM encoding used by others.
Sorry about that.