[Coco] 3.5" FD drives

dave dave at davebiz.com
Fri Jul 24 22:55:47 EDT 2015


You are correct.  These drives don't even have the solder pads.  As far 
as I can tell you'd have to do the select with the cable.

Dave Philipsen


On , Bruce W. Calkins wrote:
> I would expect (and don't mind being proven wrong) that drives of that
> late a manufacture would have solder pads.  Generally 2 sets 1 of
> which will have a solder bridge.  To change it over you would remove
> the solder and bridge the other set.  By that date it was rare to find
> the full 4 sets of solder pads, jumpers or a 4 position switch.  I
> snagged a few 3.5" drives decades ago that had a 4 position switch,
> but outside of my collection it has been a very long time since I've
> seen one.
> 
> Bruce W.
> 
> 
> 
> ----- Original Message -----
> 
> From: "Dave Philipsen"
> 
>> I'm not sure if they have jumpers.  I'll have to check at the shop 
>> later today.  Typically, this sort of drive selects by means of the 
>> ribbon cable.
>> 
>> On 7/24/2015 8:54 AM, Kip Koon wrote:
>>> Hi Dave,
>>> What jumper settings are available?
>>> 
>>> Kip Koon
> 
>>>> -----Original Message-----
>>>> On Behalf Of dave
> 
>>>> 
>>>> I have 24 new old-stock floppy drives.  They are 3.5" 1.44MB drives 
>>>> made by NEC.
> 
>>>> 
>>>> Dave Philipsen
> 
> 
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