[Coco] Disk drive question

[Bruce W. Calkins]

Sorry, it was the somewhat rare 26-3022 drive controller that required 12v. 
The 26-3029, FD-500/501/502 controllers were 5v.  There is a rather involved 
hardware hack to make the 26-3022 capable of addressing the 1.44 Meg 
floppies too.  For most practical use any drive works with any controller.

Bruce W.

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----- Original Message ----- 
From: "Rogelio Perea"

> Controllers from RS catalog 26-3029 onward were 5v only ones and usable
> with the CoCo 2 & 3, that will include the FD500/501/502.
>
> Don't have the RS catalog handy for the older controller but if it ain't
> the 3029 (which is housed in the long length pak) then it is more or less 
> a
> sure bet it will be the older 12v requiring controller.
>
>
> -- RP
>
>
> On Wed, Jan 18, 2012 at 10:37 PM, Bill Pierce <ooogalapasooo at aol.com> 
> wrote:
>
>> Wasn't there a problem running the FD-501 with a Coco 3? Seems like it 
>> was
>> a voltage problem. Something like no 12v on the Coco 3 and the FD-501s 
>> need
>> the 12v? Or was this the FD-500? I remember reading somewhere that you
>> needed the FD-502 for a Coco 3. This may even apply to some of the later
>> Coco 2s. Seems like you had to have a Multipak to use them as the 
>> Multipak
>> supplied the proper voltages.
>