Substituting DSHD for DSDD disks (or DS2D if you prefer)

Eric Smith spacewar at
Tue Jan 26 19:27:24 CST 2016

On Tue, Jan 26, 2016 at 5:59 PM, Chuck Guzis <cclist at> wrote:
> On 01/26/2016 02:48 PM, Eric Smith wrote:
>> I was surprised to learn that the 9895, while it supports standard
>> IBM 3740 single-density format, uses an HP-proprietary M2FM
>> double-density format.
> So did Intel on the MDS.  I don't recall if there was any significant
> difference between Intel and HP MMFM encoding, however.

Entirely different. As was DEC RX02.

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