DEC Pro hard drive formatter

Chris Zach cz at
Thu Jan 14 14:53:23 CST 2021

Cool! I just bought one of the G thingies ($30 on Amazon), will try 
loading up the modified firmware and see if it works. Just easier than 
making an endless pile of floppies I will only use once or twice (I 
already have the whole POS 2.0 set).

So does a 380 support programs in split I/D? If not I need to start 
hacking it to do so as 64k limits are for the birds....


On 1/14/2021 3:24 PM, Bjoren Davis via cctalk wrote:
> I've successfully used a DREM-2 ( with my Pro 380 
> for both floppy and hard disk emulation.
> --Bjoren
> On 1/14/2021 2:14 PM, Bill Gunshannon via cctalk wrote:
>> On 1/14/21 1:52 PM, Paul Koning via cctalk wrote:
>>>> 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.
>> What about the GOTEK with modified firmware that they are talking
>> about in other groups?
>> bill

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