[Coco] Harddrive Specialists floppy controller

[Arthur Flexser]

Actually, I now realize that I erred in the pin numbering.  It's the two
pairs of pins at either end of the 28-pin socket that have nothing plugged
into them when using a 24-pin EPROM in the socket:  pins 1 and 28 at one
end, and 14 and 15 at the other end.  Though probably anyone attempting to
use these instructions would have inferred that's what I meant in any case.

Art

On Sat, Aug 12, 2017 at 3:22 PM, Arthur Flexser <flexser at fiu.edu> wrote:

> I used one of those HDS controllers for years, with a rectangular hole I
> cut in the plastic cover to make enough room to piggyback the ROM (EPROM)
> on top of a SmartWatch.
>
> Art
>
> On Sat, Aug 12, 2017 at 2:32 PM, Kip Koon <computerdoc at sc.rr.com> wrote:
>
>> Hi Art,
>> Thank you for that information.  I have the Harddrive Specialist Floppy
>> Controller also.  Mine is working great with the HDB-DOS DW3 Coco 3 rom in
>> it.  I have squirrelled this vital piece of information about this
>> controller away for later use as well.  I appreciate your efforts over the
>> years.  Thank you very much.
>>
>>
>> Kip Koon
>> computerdoc at sc.rr.com
>> http://www.cocopedia.com/wiki/index.php/User:Computerdoc
>>
>> -----Original Message-----
>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Arthur
>> Flexser
>> Sent: Saturday, August 12, 2017 3:41 AM
>> To: CoCoList for Color Computer Enthusiasts
>> Subject: Re: [Coco] Harddrive Specialists floppy controller
>>
>> Here's an exchange on the list about that from way back in 2003 that I
>> filed away:
>>
>> ------------------------------------------------------------
>> ------------------------------
>>
>> Here you go, Mark:
>>
>> The ABC jumper selects between ROM sockets A (24 pin) and B (28
>> pin)--AB=socket A; BC=socket B.
>>
>> The other 2 jumpers affect the 28-pin socket B, which may be set to
>> accept either a 28-pin ROM or a 24-pin one (by leaving pins 1, 2, 27, and
>> 28 with nothing plugged into them).  The DEFGH jumper handles that:
>> Connect EF and GH for 28 pin operation, DE and FG for 24.  Under 28-pin
>> operation, IJK selects ROM capacity: IJ for a 2764, JK for a 27128.
>>
>> Art
>>
>>
>> On Sat, 22 Nov 2003, Mark Marlette wrote:
>>
>> >
>> >
>> > Does someone have the jumper settings for the HDS floppy controller?
>> > The one I have has the following jumpers in groups.
>> >
>> > A,B,C
>> >
>> > D,E,F,G,H
>> >
>> > I,J,K
>> >
>> > Any help would be appreciated.
>> >
>> > Thanks,
>> >
>> > Mark
>> > Cloud-9
>> >
>>
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>>
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>
>