[Coco] CoCo Hard Drive History

[Bob Devries]

Gene, I have two SCSI (Quantum) drives hanging off my Disto 4-in-1 and they 
work flawlessly.

Regards, Bob Devries
Dalby, QLD, Australia

----- Original Message ----- 
From: "Gene Heskett" <gheskett at wdtv.com>
To: <coco at maltedmedia.com>
Sent: Sunday, October 13, 2013 7:10 PM
Subject: Re: [Coco] CoCo Hard Drive History


> On Sunday 13 October 2013 05:09:32 tonym did opine:
>
>> >---- Original Message ----
>> >From: "Greg Law" <glaw at live.com>
>> >Sent: 10/13/2013 1:59:03 AM
>> >To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
>> >Subject: Re: [Coco] CoCo Hard Drive History
>> >
>> >From: tonym
>> >
>> >> Are these WD SASI-to-MFM boards similar to the controller boards used
>> >> in the Kaypro 10?
>> >> Or is that a different board? I think those were WD1002-HD0?
>> >
>> >Yes, exactly the same as used in the Kaypro and a bunch of other
>> >computers at the time. The WD1002-HDO is the same board as the
>> >WD1002-05, except the -HDO does not have the floppy controller
>> >components. Hence, HDO is hard-drive only.
>>
>> Looked them up, and the datasheets.
>>
>> The WD1002-05 and WD1002-HDO are NOT the same as the WD1002-SHD. the
>> -SHD is SASI, and the -05 and -HDO are some host bus. even the block
>> diagrams are different, and the -SHD datasheet mentions SASI and the
>> commands supported.
>>
>> Looks like the Eliminator supporter the same WD1002-HDO as the Kaypro
>> 10...
>>
>> SO my other question remains...
>>
>> Do the Disto 4-n-1 and HD II support a SCSI HDD attached directly, as
>> opposed to going MFM?
>
> Yes, but it was a single drive only, Tony's interface was missing too many
> signals that would have allowed 2 or more drives to co-exist.
>>
>>
>>
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>
>
> Cheers, Gene
> -- 
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