DEC Pro hard drive formatter

Paul Koning paulkoning at
Thu Jan 14 12:52:03 CST 2021

> On Jan 14, 2021, at 1:42 PM, Chris Zach <cz at> wrote:
> ...
> Is there a hardware emulator that can emulate RX50's from images to a Pro? Been wondering that...

Perhaps David Gesswein's MFM emulator could be modified to do that.  You might ask him.  I don't think it does so out of the box, though.  The signal frequencies are much lower than those of hard drives.

Some others make products that claim to offer the capability, is one (mentioned by David) and I also found this .  I know nothing about either.  Standard PC floppy formats use 9 sectors per track but normal drives can handle 10-sector DEC formats too.  If the emulators are done right they should handle that as well, but of course you'd have to confirm that.


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