[Coco] CoCo Hard Drive History

[Bob Devries]

Gene, you're right...
I just checked and I have all 50 pins between the two drives, and Disto's 
standard cable to the controller. Quite easily done, actually.

Regards, Bob Devries
Dalby, QLD, Australia

----- Original Message ----- 
From: "Gene Heskett" <gheskett at wdtv.com>
To: <coco at maltedmedia.com>
Sent: Monday, October 14, 2013 10:27 AM
Subject: Re: [Coco] CoCo Hard Drive History


> On Sunday 13 October 2013 20:23:41 Bob Devries did opine:
>
>> Gene, I have two SCSI (Quantum) drives hanging off my Disto 4-in-1 and
>> they work flawlessly.
>>
> Did you do that by making up a jumper and connecting the center pins of 
> the
> drives together?  Thats the pins the drive use to talk to each other so
> they can share the interface, and which Tony's std cable does not connect.
>
> I was tempted to do that but never quite found my round tuit.  I bought a
> TC^3 instead, which does 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.
>> >
>> >> --
>> >> Coco mailing list
>> >> Coco at maltedmedia.com
>> >> http://five.pairlist.net/mailman/listinfo/coco
>> >
>> > Cheers, Gene
>> >
>> > Rome was not built in one day.
>> > -- John Heywood
>> > A pen in the hand of this president is far more
>> > dangerous than 200 million guns in the hands of
>> >
>> >         law-abiding citizens.
>> >
>> > --
>> > Coco mailing list
>> > Coco at maltedmedia.com
>> > http://five.pairlist.net/mailman/listinfo/coco
>>
>> --
>> Coco mailing list
>> Coco at maltedmedia.com
>> http://five.pairlist.net/mailman/listinfo/coco
>
>
> Cheers, Gene
> -- 
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
>
> When does summertime come to Minnesota, you ask?  Well, last year, I
> think it was a Tuesday.
> A pen in the hand of this president is far more
> dangerous than 200 million guns in the hands of
>         law-abiding citizens.
>
> --
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